Cited by 1,168Philosophy and Theoretical ScienceNeural dynamics and brain functionVisual perception and processing mechanisms

Conscious Processing and the Global Neuronal Workspace Hypothesis

Open access
Mashour, George A., Roelfsema, Pieter, Changeux, Jean-Pierre, Dehaene, Stanislas·2020·Neuron

Abstract

We review the central tenets and neuroanatomical basis of the global neuronal workspace (GNW) hypothesis, which attempts to account for the main scientific observations regarding the elementary mechanisms of conscious processing in the human brain. The GNW proposes that, in the conscious state, a non-linear network ignition associated with recurrent processing amplifies and sustains a neural representation, allowing the corresponding information to be globally accessed by local processors. We examine the GNW hypothesis in light of recent data that contrast brain activity evoked by either conscious or nonconscious contents, as well as during conscious or non-conscious states, particularly general anesthesia. We also discuss the relationship between the intertwined concepts of conscious processing, attention, and working memory.

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Written from the paper’s full text.

TL;DR

This review presents the global neuronal workspace hypothesis, arguing that conscious access arises when information triggers non-linear ignition and recurrent broadcasting across distributed cortical networks. It surveys supporting evidence from simulations, electrophysiology, imaging, anesthesia, disorders of consciousness, sleep, and development, while noting unresolved debates and comparisons with other theories.

Key findings

  • The GNW proposes that conscious access depends on sudden ignition of workspace neurons, with recurrent loops amplifying and sustaining representations for global access; prefrontal and parietal hubs are important but not the exclusive site of conscious access.
  • Empirical work reports a late divergence around 200–300 ms after stimulus onset between consciously perceived and unperceived trials, often linked to the P300/late-positive component, while early sensory processing can persist without awareness. Studies across visual, auditory, and tactile modalities, plus no-report monkey prefrontal recordings, support ignition; weak stimuli may fail at V1-to-V4 or V4-to-prefrontal stages.
  • Anesthesia, disorders of consciousness, and sleep are associated with disrupted long-range frontoparietal connectivity, reduced dynamic repertoire, and loss of late ignition/P3, while short-latency processing can remain. Thalamic or prefrontal stimulation may restore aspects of consciousness in some cases.
  • Attention and working memory overlap with GNW functions; conscious working memory is proposed to involve globally distributed persistent firing, whereas activity-silent or local memories remain unconscious until reinstated. Comparisons with IIT, RPT, and HOT note shared and divergent claims.

Methods

  • Narrative review of the GNW’s central tenets, neuroanatomical basis, simulations, and empirical evidence; no new primary data are reported.
  • Synthesizes computational models (Stroop, masking/inattention, macaque connectome, laminar connectivity) and human/nonhuman studies using EEG/MEG/fMRI, intracranial recordings, anesthesia, lesions, sleep, and development.
  • Main analysis is conceptual integration and comparison with other theories, including discussion of causal interventions and future directions.

Limitations

  • Stated: unresolved controversy over whether the P300/late positive or earlier N2/VAN indexes awareness versus post-perceptual processes; no-report paradigms have not resolved this.
  • Stated: difficulty experimentally adjudicating among GNW, IIT, RPT, and HOT because of shared predictions and coarse tools; many findings are correlational, causal evidence is limited, and lesion heterogeneity plus possible covert consciousness complicate inferences from disorders of consciousness.
  • Evident: as a review, it is selective and narrative rather than systematic, and some claims about development, self-consciousness, and working memory are presented as hypotheses or untested.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.neuron.2020.01.026

Cites

254 of 254 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

120 of 228 cited sources checked · 59 supported · 3 flagged · accuracy not yet measured

  • Premisecitation

    Noel et al. (2018) found that sudden late ignition was the only clear signature common to auditory, visual, and audiovisual conditions in human EEG.

    “They found that sudden late ignition was the only clear signature common to all three conditions.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Noel et al., 2018 source
  • Premisecitation

    Tracer studies in non-human primates show that these areas are connected as a high-efficiency cortical core with high-density connectivity.

    “Recent tracer studies in non-human primates indicate that these areas indeed connect together as a “high-efficiency cortical core” with high-density connectivity (Markov et al., 2013) (Figure 1C).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Markov et al., 2013 source
  • Premisecitation

    The GNW activates non-linearly in an event called ignition, marked by sudden, coherent, exclusive activation of a subset of workspace neurons coding the current conscious content while the rest are inhibited.

    “Ignition is characterized by the sudden, coherent, and exclusive activation of a subset of workspace neurons coding for the current conscious content, with the remainder of the workspace neurons being inhibited.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Dehaene et al., 2003 source
  • Premisecitation

    Recent evidence in rodents shows that persistence of neuronal firing rates for working memory storage is not purely cortical but relies on interactions with subcortical structures including thalamus and cerebellar nuclei.

    “Recent evidence in rodents demonstrated that the persistence of neuronal firing rates for working memory storage is not a purely cortical phenomenon but instead relies on the interactions with subcortical structures, including the thalamus (Guo et al., 2017) and cerebellar nuclei (Gao et al., 2018).”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites Guo et al., 2017 source
      Experimental — accuracy not yet measured
    • cites Gao et al., 2018 source
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  • Interpretationcitation

    The widespread presence of working-memory effects is important for the large diversity of contents that can enter working memory.

    “Its widespread presence is important for the large diversity of contents that can enter into working memory (Christophel et al., 2017).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Christophel et al., 2017 source
  • May combine two claims. 91
  • The quote only partly states this claim. 9
  • Classified as probably not a substantial claim. 37
  • May combine two claims.

    Premisecitation

    Ignition has been demonstrated in neural firing: human concept cells in anterior temporal lobe fire after 300-400 ms to specific pictures and words, with stronger and longer firing when the stimulus is consciously perceived or recalled; monkey prefrontal neurons encode the current content of consciousness during binocular rivalry in a no-report paradigm.

    “In humans, the so-called concept cells in the anterior temporal lobe, which fire after 300 to 400 ms to specific pictures and words such as “Bill Clinton” or “the World Trade Center,” do so with stronger and longer-lasting firing rates when the corresponding stimulus is consciously perceived”
    Quote in the paperSubstantial claim3 of 3 sources checked
    • cites Gelbard-Sagiv et al., 2018 source

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    • cites Kreiman et al., 2002 source

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    • cites Quiroga et al., 2008 source

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    Premisecitation

    Unseen subliminal stimuli can evoke long-lasting brain activations, sometimes over one second, but they do not evoke sudden ignition; instead they produce a slowing, decaying wave of activity.

    “The difference, however, is that subliminal stimuli do not evoke a sudden ignition but rather a slowing, decaying wave of activity.”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites King et al., 2016 source
    • cites Soto and Silvanto, 2014 source
    • cites Trübutschek et al., 2017 source
  • May combine two claims. The quote only partly states this claim.

    Premisecitation

    A recent modeling study confirmed that ignition emerges naturally in a network with reciprocal projections; simulations showed that when feedforward connections are balanced by local inhibition, stimuli elicit a stable cascade with late sudden ignition, and the feedforward signal must reach prefrontal cortex to activate a reverberant network involving posterior parietal cortex.

    “The simulations showed that, if feedforward connections are carefully balanced by local inhibitory influences, incoming stimuli elicit a stable cascade of activity characterized by a late and sudden ignition.”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites Joglekar et al., 2018 source
    • cites Dehaene et al., 2003 source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    Premisecitation

    The latency for conscious access can be delayed by much more than 300 ms when attention is distracted by a secondary task, and a retro-cue as late as 900 ms after a flashed stimulus can lead to retrospective conscious perception of an otherwise too-weak stimulus.

    “The latency for conscious access can in fact be delayed by much more than 300 ms when attention is temporarily distracted by a secondary task (dual-task conditions)”
    Quote in the paperSubstantial claim2 of 3 sources checked
    • cites Marti et al., 2012, 2015

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Sergent et al., 2013 source

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    • cites Thibault et al., 2016 source

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    Interpretationcitation

    Conscious access is increasingly described in terms of system dynamics with distinct trajectories for seen and unseen trials; ignition is a sudden high-speed divergence of trajectories on consciously perceived trials, generating metastable states that contain detailed decodable information about the specific consciously seen stimulus.

    “In this framework, ignition is seen as a sudden, high-speed divergence of the trajectories on trials reported as consciously perceived, generating a series of metastable activity states”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Baria et al., 2017 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites He, 2018

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites King et al., 2016 source
  • Classified as probably not a substantial claim.

    Premisecitation

    The global neuronal workspace hypothesis holds that conscious processing involves a non-linear network ignition with recurrent processing that amplifies and sustains a neural representation, making its information globally accessible to local processors.

    “The GNW proposes that, in the conscious state, a non-linear network ignition associated with recurrent processing amplifies and sustains a neural representation, allowing the corresponding information to be globally accessed by local processors.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Dehaene et al., 1998 source

      Theoretical Premises describes sudden, all-or-none activation of a globally interconnected workspace, and Computer Simulation describes mutually reinforcing connections that sustain activity and amplify processor responses. These support much of the paraphrase, though the paper does not call the process “network ignition.” Its Conclusions explicitly limit the model to features of effortful tasks rather than an exhaustive account of conscious processing, so the claim's generalization to the conscious state goes beyond this source. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
  • May combine two claims.

    Premisecitation

    Early perceptual processing in the first 200 ms can be fully preserved on trials without conscious perception, especially under inattention, whereas conscious appraisal correlates with late events lagging at least 200 ms, such as the P300 or late-positive component, which vanishes almost entirely under inattention or during sleep.

    “The first 200 ms of brain activity, corresponding to early perceptual processing, can be fully preserved on trials without conscious perception, particularly under inattention conditions”
    Quote in the paperSubstantial claim2 of 3 sources checked
    • cites Marti and Dehaene, 2017 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Marti et al., 2015 source

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    • cites Sergent et al., 2005 source
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    Premisecitation

    Simulations indicate that even without stimulation the GNW has continuous stochastic spontaneous activity, which matches the fluctuating fMRI and EEG functional connectivity seen in awake resting brains and its disappearance under anesthesia or in disorders of consciousness.

    “simulations show that the GNW is subject to a continuous stream of stochastic spontaneous activity”
    • Also stated in: § Central Tenets and Neuroanatomical Basis of the GNW Theory · plain
      “This property of the model fits with the constant variations in fMRI and electroencephalogram (EEG) functional connectivity that are observed in the awake resting brain and that vanish during anesthesia or in patients with disorders of consciousness”
    Quote in the paperNot a substantial claim3 of 3 sources checked
    • cites Dehaene and Changeux, 2005 source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Barttfeld et al., 2015 source

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    • cites Demertzi et al., 2019 source

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    Interpretationcitation

    The GNW theory can be combined with Bayesian inference, in which GNW neurons provide a compressed high-level model of the external world, top-down signals broadcast predictions, and bottom-up signals convey sensory input and either amplify predicted signals or measure prediction error, allowing the central model to be updated and achieving a coherent multisensory model.

    “GNW neurons, lying at the top of a deep feedforward network, provide a compressed, high-level symbolic model of an aspect of the external world; top-down signals broadcast the predictions that this model makes to lower-level areas; and bottom-up signals convey sensory signals and may either amplify the signals predicted by top-down input”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Keller and Mrsic-Flogel, 2018 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Kersten et al., 2004 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Rao and Ballard, 1999 source
  • May combine two claims.

    Interpretationcitation

    The P300/late-positive component is the most consistent scalp-recorded correlate of conscious ignition across auditory and visual paradigms, but this proposal has been criticized because an earlier negative event (N2, N3, or VAN) peaking around 260 ms is also often observed; VAN has been suggested as the earliest electrophysiological correlate of visual awareness, and it remains unclear whether P

    “This proposal received support but also criticism, because an earlier negative event (variably called N2, N3, or even “visual awareness negativity” [VAN]) peaking at ∼260 ms and with a total duration of ∼200 ms is also often observed when contrasting conscious to unconscious stimuli”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Dehaene and Changeux, 2011 source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Eklund and Wiens, 2018 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Koivisto and Revonsuo, 2010 source
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    Interpretationcitation

    Abundant human neurophysiological and neuroimaging studies support the ignition concept, reporting a sudden divergence in brain activity around 200-300 ms after stimulus onset between conscious and nonconscious trials, with additional propagation toward prefrontal and parietal cortex on conscious trials, regardless of stimulus modality or paradigm.

    “These investigations reported the existence of a sudden divergence in brain activity, around 200 to 300 ms after stimulus onset, between trials with or without conscious perception, with an intense propagation of additional activity, particularly toward the prefrontal and parietal cortex, on conscious trials”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Dehaene and Changeux, 2011 source

      Section V identifies sudden, all-or-none ignition of prefronto-parietal networks as a measure of conscious access, supporting the reported divergence and propagation. Section IV places global ignition around 200–300 ms, but also says its timing may vary with the experimental paradigm; Section II reports a 300–500 ms window in one study. The claim’s ‘regardless of stimulus modality or paradigm’ qualification is therefore not supported. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
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    Premisecitation

    Adding layer-specific connectivity to simulations produces frequency-band-specific causality patterns-bottom-up gamma from supragranular layers and top-down alpha-beta from bottom layers-which have been observed empirically across the cortical hierarchy in humans and non-human primates.

    “Addition of layer-specific connectivity in simulations (Mejias et al., 2016) leads to the emergence of frequency-band-specific patterns of causality (bottom-up gamma arising primarily in supragranular layers versus top-down alpha-beta arising primarily from bottom layers)”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Mejias et al., 2016 source
    • cites Bastos et al., 2015 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Michalareas et al., 2016 source
  • May combine two claims.

    Premisecitation

    Ignition can be triggered by an external stimulus, during a cognitive task, or can occur spontaneously and stochastically at rest.

    “Ignition may be triggered by an external stimulus, as part of a cognitive task, or it may occur spontaneously and stochastically at rest.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Dehaene and Changeux, 2005 source

      The Results sections “Spontaneous Ignition” and “Extinction of External Stimuli by Spontaneous Ignition” describe both stimulus-evoked ignition and ignition without external stimulation; the former also says spontaneous ignitions can visit assemblies in random order. The copy does not establish the separate claim that ignition is triggered as part of a cognitive task. It also describes the simulation as deterministic, so “stochastically” should be understood as describing its observed variability rather than a random simulation mechanism. Page numbers are unavailable in our copy. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
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    Interpretationcitation

    The framework predicts that global top-down signals related to working memory content depend on a conscious model, while some modular signals can persist non-consciously; this is supported by auditory mismatch negativity preserved in coma, sleep, or inattention while a later P3 to global sequence violation occurs only consciously, and by motor error-related negativity occurring only when the error

    “This framework predicts that, while some signals within modular pathways may persist under non-conscious conditions, global top-down signals related to the content of working memory depend on the availability of a conscious model.”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Bekinschtein et al., 2009 source
    • cites Chao et al., 2018 source
    • cites Charles et al., 2013 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    Premisecitation

    The GNW is not a localizationist account of conscious access, and conscious access is not posited to reside in a single node; rather the GNW acts as a distributed router, with prefrontal cortex playing a key but not exclusive role, and includes dorsolateral prefrontal and inferior parietal cortex along with other hubs.

    “the GNW is not a localizationist theory of conscious access, nor is conscious access posited to exist solely in a given node of the GNW”
    • Also stated in: § Central Tenets and Neuroanatomical Basis of the GNW Theory · plain
      “Rather, the GNW acts as a distributed “router” associated with millions of neurons distributed in many brain regions through which information can be amplified, sustained, and made available to specialized sensory processors and thalamocortical loops.”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites Boly et al., 2017 source

      Split into 2 atoms — 0 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 2 unverifiable. Expand the claim to see per-atom verdicts.

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    • cites Odegaard et al., 2017 source

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  • May combine two claims. The quote only partly states this claim.

    Premisecitation

    Simulations of masking and inattention show an initial brief feedforward excitation via fast AMPA connections, followed by a second stage assumed to be mediated by slower NMDA feedback that amplifies inputs in a cascade, driving the stimulus-relevant network into a global, self-sustained, reverberating, or ignited state characterized by increased gamma-band corticothalamic oscillations and cross-1

    “In a second stage, assumed to be mediated by the slower NMDA-mediated feedback connections, the advancing feedfor-ward wave amplified its own inputs in a cascading manner, quickly leading the whole stimulus-relevant network into a global, self-sustained, reverberating, or ignited state.”
    • Also stated in: § Simulations of the Global Workspace · plain
      “This ignition was characterized by an increased power of local corticothalamic oscillations in the gamma band and their synchrony across areas (Dehaene et al., 2003).”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites Dehaene and Changeux, 2005 source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured
    • cites Dehaene et al., 2003 source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    • The authors state this as an assumption: The second stage of the simulation is mediated by slower NMDA-mediated feedback connections.
  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationcitation

    The final result of attentional selection enters consciousness, where it can use the GNW to activate all features belonging to the same object even if represented in different cortical areas, allowing conscious perception to be occupied by coherent, multifeature, multimodal objects.

    “Irrespective of the precise interpretation of these experiments, the final result of attentional selection enters consciousness, where it can use the GNW to activate all features that belong to the same object even if they are represented in different cortical areas (Roelfsema and Houtkamp, 2011), allowing conscious perception to be occupied by coherent, multifeature, and multimodal objects (”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Roelfsema and Houtkamp, 2011 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    Premisecitation

    Recurrent circuits permit ignition and persistent firing and can be local or involve neurons in different cortical areas; the GNW emphasizes long-range loops between cortical areas, with connections from layers II/III and V/VI, and effects of recurrent processing are most pronounced in layers II/III and V of monkey primary visual cortex, with corresponding laminar profiles in humans during

    “Such recurrent circuits permit ignition and persistent neuronal firing and can either be built from local cortical circuits or include neurons in different cortical areas (Wang, 2001).”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Wang, 2001 source
    • cites Self et al., 2013 source
    • cites van Kerkoerle et al., 2017 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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    Premisecitation

    If subjects learn an ordered list of concepts, medial temporal lobe neurons tuned to an upcoming item activate, and similar prospective coding effects occur in monkey frontal cortex.

    “For example, if subjects learn an ordered list of concepts, neurons in the medial temporal lobe start to activate if they are tuned to an upcoming item in the list (Reddy et al., 2015) and similar “prospective coding” effects have been observed in the frontal cortex of monkeys (Rainer et al., 1999).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Reddy et al., 2015 source
    • cites Rainer et al., 1999 source
  • May combine two claims. The quote only partly states this claim.

    Premisecitation

    van Vugt et al. (2018) found that a minimum amount of activity must reach prefrontal cortex to elicit ignition, linking GNW to signal detection theory; the SDT threshold corresponds to the PFC ignition threshold, sensitivity depends on how efficiently the stimulus is propagated to PFC, and pre-stimulus brain-state markers predict sensitivity and false-alarm probability, with high false-alarm

    “The van Vugt et al. (2018) results revealed that a minimum amount of activity needs to reach PFC before it elicits ignition, thereby establishing a relationship between the GNW and the classic signal detection theory (SDT)”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites van Vugt et al., 2018 source
    • cites King and Dehaene, 2014 source

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The delayed response enhancement in V1 during figure-ground perception is thought to be caused by feedback from higher visual areas to V1.

    “This delayed response enhancement is thought to be caused by feedback from higher visual areas to V1 (Christophel et al., 2017; Klink et al., 2017; Lamme and Roelfsema, 2000).”
    Quote in the paperNot a substantial claim1 of 3 sources checked
    • cites Christophel et al., 2017 source

      The Different Levels of Abstraction section discusses a possible bias signal from prefrontal cortex to early visual cortex during working memory, not delayed V1 response enhancement during figure–ground perception. Searches for figure–ground perception and feedback from higher visual areas to V1 found no passage in our copy addressing that claim. (LLM, conf=0.75)

      Experimental — accuracy not yet measured
    • cites Klink et al., 2017 source
    • cites Lamme and Roelfsema, 2000 source
  • May combine two claims.

    Premisecitation

    Several studies have dissociated attention from awareness, for example by showing that a subliminal cue can summon attention to a location and improve perception of stimuli there.

    “Several studies have dissociated attention from awareness, for example, by demonstrating that attention can be summoned to a location by a subliminal cue so that the perception of stimuli at that location is improved (for reviews and discussions, see Dehaene and Changeux, 2011; Koch and Tsuchiya, 2007).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Dehaene and Changeux, 2011 source

      In “Selective Attention versus Conscious Access” (section I; page unavailable), the review says conscious access must be distinguished from attention and describes them as separate processes. The passages retrieved do not establish the cited example: that a subliminal cue draws attention to a location and improves perception of stimuli there. (LLM, conf=0.78)

      Experimental — accuracy not yet measured
    • cites Koch and Tsuchiya, 2007 source
  • May combine two claims.

    Premisecitation

    Concept cells fire when concepts are held in working memory and become active when concepts are retrieved from long-term memory.

    “A central finding is that concept cells fire when concepts are held in working memory (Kamiński et al., 2017; Kornblith et al., 2017) and become active when these concepts are retrieved from long-term memory (Gelbard-Sagiv et al., 2008).”
    Quote in the paperNot a substantial claim3 of 3 sources checked
    • cites Kamiński et al., 2017 source
    • cites Kornblith et al., 2017 source
    • cites Gelbard-Sagiv et al., 2008 source
  • May combine two claims.

    Premisecitation

    Attentional signals select information by amplifying its activity and reducing that of competing stimuli, whereas persistent neuronal activity keeps information online in working memory.

    “Attentional signals select a particular piece of information by amplifying its activity and reducing that of other competing stimuli, whereas persistent neuronal activity keeps information online in working memory (Roelfsema, 2005; Roelfsema et al., 2000; Zylberberg et al., 2011).”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Roelfsema, 2005 source
    • cites Roelfsema et al., 2000 source

      Sections 3.4.1 and 6.2 link attentional selection to enhanced neuronal firing, and section 3.5.2 describes a spatial signal that persists across a delay as a form of working memory. The paper also describes inhibition among competing object representations, but section 3.5.1 says it cannot distinguish active suppression of items losing relevance from passive decay. It therefore does not fully support the claim that attentional signals reduce competing stimuli’s activity. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
    • cites Zylberberg et al., 2011 source

      The ‘Single decision making by evidence accumulation’ section says sustained neuronal firing stores temporary, task-relevant information, and the ‘Opinion’ section describes attentional modulation as enhanced activity for selected visual information. The copy does not say that attention reduces the activity of competing stimuli; its discussion of mutual inhibition concerns competing productions instead. Page numbers were not provided for these passages. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
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    Premisecitation

    Simultaneous EEG and fMRI investigations in humans confirmed functional disconnection of prefrontal cortex from posterior cortex during propofol and sevoflurane anesthesia, with concomitant reduction of feedback connectivity identified using symbolic transfer entropy based on EEG.

    “Simultaneous EEG and fMRI investigations in humans have confirmed the functional disconnection of the prefrontal cortex from the posterior cortex during propofol and sevoflurane anesthesia by fMRI, with a concomitant reduction of feedback connectivity identified using symbolic transfer entropy based on EEG signals (Jordan et al., 2013; Ranft et al., 2016).”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites Jordan et al., 2013 source
    • cites Ranft et al., 2016 source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured
  • May combine two claims.

    Premisecitation

    The anesthetized brain is not just in a fixed state; recent observations found it to be more dynamic than previously considered, with metastable oscillations or connectivity patterns that appear to reflect intrinsic dynamics rather than pharmacokinetic instability or external stimuli.

    “Still, it is important to note that the anesthetized brain is not just in a fixed state; recent observations found it to be more dynamic than previously considered, with metastable oscillations or connectivity patterns that appear to reflect intrinsic dynamics rather than pharmacokinetic instability or external stimuli (Hudson et al., 2014; Li et al., 2019; Vlisides et al., 2019).”
    Quote in the paperNot a substantial claim1 of 3 sources checked
    • cites Hudson et al., 2014 source
    • cites Li et al., 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Vlisides et al., 2019 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured
  • May combine two claims.

    Interpretationcitation

    Persistent firing for accessory memory items is weaker than that of the attended item, which may explain why they are more difficult to detect with non-invasive methods such as fMRI and MEG.

    “However, persistent firing for these items is weaker than that of the attended item (Konecky et al., 2017), which may explain why they are more difficult to pick up with non-invasive methods, such as fMRI and MEG (Stokes, 2015; Trübutschek et al., 2017; Trübutschek et al., 2018).”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Konecky et al., 2017 source
    • cites Stokes, 2015 source
    • cites Trübutschek et al., 2017 source

      The Results section (‘Contents of conscious and non-conscious working memory can be tracked transiently’; page not provided) reports that MEG tracked seen target locations but found no statistically significant decoding of unseen locations. This supports the narrower point that some memory contents are difficult to detect with MEG. The paper does not establish that weaker persistent firing in accessory items explains the difficulty, or address their detection with fMRI. (LLM, conf=0.83)

      Experimental — accuracy not yet measured
  • May combine two claims.

    Interpretationcitation

    Maintenance in working memory gives rise to MEG signatures similar to conscious ignition, supporting the view that conscious ignition is a first step leading to entry of information into working memory.

    “Maintenance in working memory gave rise to similar MEG signatures as conscious ignition (Trübutschek et al., 2017), supporting the view that conscious ignition is a first step leading to the entry of information into working memory.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Trübutschek et al., 2017 source
  • May combine two claims.

    Premisecitation

    Electrocorticography during propofol and ketamine anesthesia in human and non-human primates reveals disrupted functional connectivity across S1 and M1 cortex, as well as altered beta oscillations typically associated with feedback processing.

    “Electrocorticography during propofol (Malekmohammadi et al., 2018) and ketamine (Schroeder et al., 2016) anesthesia in human and non-human primates, respectively, reveals disrupted functional connectivity across the S1 and M1 cortex, as well as altered beta oscillations, which are typically associated with feedback processing (Bastos et al., 2015).”
    Quote in the paperNot a substantial claim3 of 3 sources checked
    • cites Malekmohammadi et al., 2018 source
    • cites Schroeder et al., 2016 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured
    • cites Bastos et al., 2015 source
  • May combine two claims.

    Premisecitation

    This dynamic signature of conscious processing was initially discovered in fMRI studies of awake versus anesthetized monkeys and later found to generalize to humans in vegetative or minimally conscious states.

    “This dynamic signature of conscious processing was initially discovered in fMRI studies of awake versus anesthetized monkeys (Barttfeld et al., 2015) and later found to generalize to humans in vegetative or minimally conscious states (Demertzi et al., 2019).”
    Quote in the paperNot a substantial claim2 of 2 sources checked
    • cites Barttfeld et al., 2015 source
    • cites Demertzi et al., 2019 source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The perturbational complexity index might be useful in stratifying patients with pathologic disorders of conscious access.

    “Subsequent investigation revealed that the perturbational complexity index might be useful in stratifying patients with pathologic disorders of conscious access (Casarotto et al., 2016).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Casarotto et al., 2016 source
  • May combine two claims.

    Premisecitation

    Some surrogate measures of Φ have been successfully applied to altered levels of consciousness in humans and relate to network factors such as topological modularity or critical dynamics.

    “Furthermore, some surrogate measures of Φ have been successfully applied to altered levels of consciousness in humans (Kim et al., 2018) and also shown to relate to network factors such as topological modularity (Kim et al., 2018) or critical dynamics (Kim and Lee, 2019).”
    Quote in the paperNot a substantial claim2 of 2 sources checked
    • cites Kim et al., 2018 source
    • cites Kim and Lee, 2019 source
  • May combine two claims.

    Premisecitation

    IIT's Φ cannot be easily computed from large-scale data, making the theory difficult to test.

    “IIT’s Φ cannot be easily computed from large-scale data, making it difficult to test the theory (for attempts, see Oizumi et al., 2016 and Tajima et al., 2015).”
    Quote in the paperNot a substantial claim2 of 2 sources checked
    • cites Oizumi et al., 2016 source
    • cites Tajima et al., 2015 source

      The Introduction discusses challenges in characterizing brain-wide dynamics, and the Discussion relates the cross-embedding findings to theories of consciousness. Neither passage says that IIT’s Φ is difficult to compute from large-scale data or that this makes IIT difficult to test. Searches for Φ, integrated information, and computational difficulty found no passage addressing that specific claim. (LLM, conf=0.70)

      Experimental — accuracy not yet measured
  • May combine two claims.

    Interpretationcitation

    Because lucid dreaming is considered a hybrid of REM sleep and waking, studies showing a causal role for the prefrontal cortex in lucid dreaming support a role for the prefrontal cortex in waking consciousness.

    “Given that lucid dreaming is considered a hybrid of REM sleep and waking (Voss et al., 2009), studies demonstrating a causal role for the prefrontal cortex in lucid dreaming thus also support a role for the prefrontal cortex in waking consciousness.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Voss et al., 2009 source
  • May combine two claims.

    Premisecitation

    Electrical stimulation of the central thalamus reverses the anesthetized state in non-human primates and is associated with return of corticocortical connectivity.

    “Indeed, electrical stimulation of the central thalamus has recently been shown to reverse the anesthetized state in non-human primates, in association with a return of corticocortical connectivity (Donoghue et al., 2019; Redinbaugh et al., 2020; J. Tasserie et al., 2019, Soc. Neurosci., conference).).”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Donoghue et al., 2019 source

      The Abstract (page not specified) reports that central-thalamus stimulation awakened propofol-anesthetized non-human primates and restored awake-like cortical activity. The paper discusses corticocortical coherence when comparing awake and unconscious states, but the passages on stimulation do not show that corticocortical connectivity returned during stimulation. (LLM, conf=0.88)

      Experimental — accuracy not yet measured
    • cites Redinbaugh et al., 2020 source
    • cites J. Tasserie et al., 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationcitation

    Surrogate measures such as the perturbational complexity index might have originated in IIT, but their results are consistent with other theories, including GNW, which proposes that conscious processing depends on integration of differentiated processors across a network.

    “Similarly, surrogate measures, such as the perturbational complexity index that have shown promise (Casali et al., 2013), might have originated in one theory (in this case, IIT), but, as noted earlier, the results are consistent with other theories, e.g., the GNW, which also proposes that conscious processing critically depends on the integration of differentiated processors across a network.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Casali et al., 2013 source
  • May combine two claims.

    Premisecitation

    IIT has served as a theoretical framework for the perturbational complexity index, which has been successful in differentiating levels of consciousness in physiological, pharmacological, and pathological perturbations.

    “Nevertheless, IIT has served as a theoretical framework for more practical measures, such as the perturbational complexity index, which has been successful in differentiating levels of consciousness in the setting of physiological, pharmacological, and pathological perturbations (Casali et al., 2013).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Casali et al., 2013 source
  • May combine two claims.

    Premisecitation

    At birth, all major long-distance fiber tracts are already in place but immature in terminal connectivity and myelination.

    “At birth, all major long-distance fiber tracts are already in place (Dubois et al., 2016), although still immature in terms of both their terminal connectivity and their myelination.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Dubois et al., 2016 source
  • May combine two claims.

    Premisecitation

    The baby brain is not a miniature adult brain; regional changes in brain connectivity and differential myelination are asynchronous and protracted.

    “Importantly, the baby brain is not a miniature adult brain; regional changes of brain connectivity and differential myelination take place that are asynchronous and protracted (Dehaene-Lambertz and Spelke, 2015; Dubois et al., 2016).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Dehaene-Lambertz and Spelke, 2015 source
    • cites Dubois et al., 2016 source
  • May combine two claims.

    Premisecitation

    Recursion is absent or very limited in other animals; they may acquire language-like symbolic abilities slowly and to a limited level.

    “Such recursion is absent or very limited in other animals; although they may acquire some language-like symbolic abilities, they do so at a very slow pace and up to a limited level (Jiang et al., 2018; Yang, 2013).”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites Jiang et al., 2018 source
    • cites Yang, 2013 source

      The Results report that Nim learned about 125 signs but lacked the combinatorial range of a rule-based grammar. The Discussion says chimpanzees showed patterns of imitation even after years of training. This supports limited language-like abilities in the primates discussed, but the paper does not establish that recursion is absent or limited in other animals generally, or measure the pace at which they acquire symbolic abilities. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductcitation

    Data are insufficient to determine whether preterm infant processes correspond to preserved sensory processing in coma or whether minimal consciousness already exists in preterm infants.

    “The data are insufficient to determine whether those processes correspond to the type of sensory processing that is known to be preserved in coma patients or whether a lowest level of minimal consciousness, as characterized in adult disorders of consciousness (Chennu et al., 2017), may already exist in preterm infants (Lagercrantz et al., 2010).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Chennu et al., 2017 source
    • cites Lagercrantz et al., 2010

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Social relationships, which appear altered in autism and autism spectrum disorder, are thought to affect GNW architectures for conscious processing.

    “Social relationships, which appear altered in autism and autism spectrum disorder, are thought to affect the GNW architectures for conscious processing (Bourgeron, 2015; Graziano and Kast-ner, 2011).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Bourgeron, 2015 source
    • cites Graziano and Kast-ner, 2011 source

      In “Awareness as a product of social perception” (page unavailable), the paper proposes that social-perception machinery contributes awareness to information in a global workspace. It does not say that social relationships alter GNW architecture or address autism or autism spectrum disorder in the passages found (searched: GNW, global workspace, autism, social relationships). (LLM, conf=0.83)

      Experimental — accuracy not yet measured
  • May combine two claims. The quote only partly states this claim.

    Interpretationcitation

    During visual processing, activity from lower visual areas is fed forward to higher areas and then fed back to form recurrent loops; early loops in lower areas may correspond to VAN, while later loops involving higher areas including the frontal-parietal network produce global recurrent processing captured by the late positive component and enable report of awareness.

    “The early recurrent loops occur in lower areas (Lamme and Roelfsema, 2000) and may correspond to VAN (Koivisto and Revonsuo, 2010). As later recurrent loops involve higher areas, including the frontal-parietal network, global recurrent processing ensues.”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Lamme and Roelfsema, 2000 source
    • cites Koivisto and Revonsuo, 2010 source
    • cites Koivisto and Grassini, 2016

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    These convergent findings indicate that conscious access is not attached to early sensory processing but instead relates to a late stage whose timing is often decoupled from the timing of the actual stimulus.

    “These convergent findings indicate that conscious access is not attached to early sensory processing but instead relates to a late stage whose timing is often decoupled from the timing of the actual stimulus.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisenone given

    The GNW hypothesis assigns a key role to large pyramidal cells in cortical layer II/III and also a contribution from pyramidal cells in deeper layer V.

    “At the neuronal level, the GNW hypothesis postulates a key role for large pyramidal cells in cortical layer II/III (Figure 1B) but also a contribution of pyramidal cells in deeper layer V, as illustrated by recent studies (see below).”
    Quote in the paperNot a substantial claim
  • May combine two claims. The quote only partly states this claim.

    Premiseown data

    The 1998 GNW model simulation of Stroop tasks showed increased workspace activation during acquisition of a novel task, effortful execution, and after errors, and generated predictions for spatiotemporal brain imaging patterns, especially dorsolateral prefrontal and anterior cingulate contributions.

    “This simulation showed that workspace activation increased during the acquisition of a novel task, its effortful execution, and after errors.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisereasoning

    The cortical areas involved in the GNW are neither identical nor redundant; each has its own functional specificity and connectivity, yet their communication is extensive and rapid, and their tight bidirectional connectivity creates the conditions for ignition.

    “Note that these areas are neither identical nor redundant: each has their own functional specificity and connectivity pattern, yet the communication between them is so extensive and rapid that any information available to one is quickly made available to others.”
    Quote in the paperSubstantial claim
  • May combine two claims. The quote only partly states this claim.

    Premisecitation

    In van Vugt et al. (2018), both perceived and unperceived weak visual stimuli caused V1 and V4 activity, but only perceived stimuli elicited sudden, strong, sustained frontal cortex activity akin to ignition; non-perceived signals could be lost at successive stages, with very weak stimuli lost from V1 to V4 and stronger stimuli reaching V4 but not propagating enough to frontal cortex; false alarm

    “Both perceived and unperceived stimuli caused activity in V1 and V4, but only the perceived ones elicited a sudden, strong, and sustained activity in the frontal cortex akin to ignition.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites van Vugt et al., 2018 source
  • May combine two claims.

    Premisecitation

    Sanchez et al. (2019) found a late sudden ignition (>200 ms) that generalized across visual, auditory, and tactile modalities, and the supramodal activity patterns included late activity in sensory regions of other modalities, compatible with global top-down broadcasting.

    “Multivariate decoders trained to classify perceived versus unperceived stimuli identified a late sudden ignition (>200 ms) that generalized across modalities.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Sanchez et al., 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims. The quote only partly states this claim.

    Interpretationcitation

    In many experiments N2 precedes P3, and their succession may index the spread of global ignition; only N2 remains when stimuli are task-irrelevant yet reported as consciously perceived, and it is unresolved whether such stimuli are truly seen or merely potentially visible but unattended.

    “In many experiments, the N2 simply precedes the P3, and their succession may index the spread of global ignition as reflected in intracranial and MEG signals.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Pitts et al., 2012, 2014

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Pitts et al., 2018 source
  • May combine two claims.

    Interpretationcitation

    Tampering with NMDA receptors, for example with ketamine, may selectively affect ignition and conscious perception, mimicking the impairment of conscious perception observed in schizophrenia.

    “This observation is important because tampering with NMDA receptors, by using ketamine, for instance, may selectively affect ignition and conscious perception, mimicking the impairment of conscious perception observed in schizophrenia (Berkovitch et al., 2017).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Berkovitch et al., 2017 source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    Models of attentional feature integration share the GNW's aim to integrate information across distributed cortical processors.

    “Thus, models of attentional feature integration share the GNW’s aim to integrate information across distributed cortical processors.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    van Vugt et al. (2018) data were explained well by a late difference in prefrontal cortex activity between reported and unreported stimuli, with only modest but significant differences in late recurrent activation of visual cortex.

    “The van Vugt et al. (2018) data were explained well by a late difference in PFC activity between stimuli that were and were not reported, with only modest (but significant) differences in the late recurrent activation of visual cortex”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites van Vugt et al. (2018) source
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    Binding mechanisms co-select distributed feature representations belonging to a single object and explain why object representations in conscious experience are usually coherent and integrated.

    “The binding mechanisms co-select distributed feature representations that are part of a single object and explain why the object representations that become part of conscious experience are usually coherent and integrated.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationcitation

    Some studies provide evidence for a causal role of top-down inputs in perception, although most experiments on conscious perception are correlational.

    “Although most experiments on conscious perception are correlational in nature and merely observe neural “correlates” or “signatures” of conscious perception, some studies (Manita et al., 2015; Sachidhanandam et al., 2013) provide evidence for a causal role of top-down inputs in perception.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Manita et al., 2015 source
    • cites Sachidhanandam et al., 2013 source
  • May combine two claims.

    Premisecitation

    The initial feedforward sweep predominantly relies on AMPA glutamate receptors, whereas NMDA receptors play a dominant role in later feedback effects.

    “Pharmacological studies indicate that, in agreement with the GNW hypothesis (Dehaene and Changeux, 2005), the initial feedforward sweep predominantly relies on AMPA glutamate receptors, whereas NMDA receptors play a dominant role in the later feedback effects (Self et al., 2012).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Self et al., 2012 source
  • May combine two claims.

    Interpretationreasoning

    In some attention/awareness dissociation experiments, the attended spatial location differed from the feature for which consciousness was established, implying the dissociation was incomplete: subjects presumably could not direct feature-based attention to features that failed to enter consciousness, and were most likely aware of the location to which they had to attend.

    “However, we note that the spatial location that was attended to in some of these experiments differed from the feature for which consciousness was established (e.g., a grating at that location), implying that the dissociation was incomplete: subjects presumably could not direct feature-based attention to features that failed to enter consciousness, and conversely, they were most likely aware of”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisenone given

    Concept cells are found in the human medial temporal lobe and activate when subjects perceive or think about specific concepts.

    “These cells are found in the medial temporal lobe of humans and activate when subjects perceive or think about specific concepts.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationcitation

    Working memory operations can execute successive mental steps required to solve a task and permit mental simulations, allowing subjects to navigate sequences of working memory states to explore future consequences of actions.

    “Working memory operations can thereby execute the successive mental steps required to solve a task and permit mental simulations; i.e., subjects can navigate through sequences of working memory states to explore the future consequences of actions (Pezzulo and Cisek, 2016).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Pezzulo and Cisek, 2016 source
  • May combine two claims.

    Interpretationreasoning

    The critical brain regions engaging in recurrent interactions for conscious perception may be task and stimulus dependent: recurrent metastable activity in PFC and interconnected associative areas may be systematically present during conscious perception, while recurrent interactions with primary sensory areas may or may not play a role depending on task emphasis on high-resolution sensory input.

    “Taken together, these findings suggest that the critical brain regions engaging in the recurrent interactions for conscious perception may be task and stimulus dependent: whereas recurrent, metastable activity in the PFC and interconnected associative areas may be systematically present during conscious perception, recurrent interactions with primary sensory areas may play a role or not, depending”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    In tasks relying on recurrent interactions between V1 and higher areas, V1 neurons become part of the global neuronal workspace, and fine-grained visual percepts can enter conscious awareness.

    “In tasks that rely on recurrent interactions between V1 and higher areas, V1 neurons become part of the GNW, and the fine-grained visual percepts can enter into conscious awareness.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    Attention is a diverse set of temporal, spatial, and cognitive filters; many may operate non-consciously, with only the final one gating entry into the global workspace.

    “It should be recognized that what we call “attention” is actually a diverse set of temporal, spatial, and cognitive filters; thus, many of these filters may operate non-consciously, with only the final one gating entry in the global workspace.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Feedback from frontal cortex amplifies tactile-stimulus-elicited neuronal activity in somatosensory cortex, and this amplification predicts successful perception.

    “Feedback from the frontal cortex thereby amplifies neuronal activity elicited by tactile stimuli in the somatosensory cortex, and this amplification predicts successful perception (Sachidhanandam et al., 2013; Takahashi et al., 2016).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Sachidhanandam et al., 2013 source
    • cites Takahashi et al., 2016 source
  • May combine two claims.

    Interpretationreasoning

    Experience builds associative memory networks in which activity can spread from one concept to the next, resembling the spread of activity for attentional operations.

    “Thus, our experience builds associative memory networks, in which activity can spread from one concept to the next, a function that resembles the spread of activity for attentional operations described above.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationcitation

    van Vugt et al. (2018) simulations described the observed visual and frontal activity as perceived stimuli igniting a self-sustained reverberating pattern between frontal and other cortices; together with a balanced amplification regime, these results suggest conscious access depends on recurrent interactions between higher cortical areas that maintain a weak stimulus as persistent activity until

    “Together, these results suggest that conscious access depends on recurrent interactions between higher cortical areas (e.g., the frontal and parietal cortex) that can maintain a representation of a weak stimulus as persistent activity until a behavioral response is required by the task.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites van Vugt et al., 2018 source
    • cites Joglekar et al., 2018 source
  • May combine two claims.

    Premisecitation

    In a monkey texture-segregation task, initial feedforward visual cortex activity was driven by texture elements in receptive fields, whereas later activity reflected successful figure-ground perception; figures that reached awareness elicited more V1 activity than background, but subliminal figures did not.

    “The initial feedforward activity elicited in the visual cortex was driven by the texture elements in the neurons’ receptive fields, whereas later activity reflected successful figure-ground perception; figures that reached awareness elicited more V1 activity than the background, but figures that stayed subliminal did not.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Supèr et al., 2001 source
  • May combine two claims.

    Premisecitation

    Tactile perception in mice is associated with reverberation of activity between frontal and somatosensory cortex, accompanied by NMDA-receptor-driven calcium events in distal dendrites of sensory neurons.

    “studies that examined tactile perception in mice revealed that it is associated with the reverberation of activity between the frontal cortex and somatosensory cortex that is accompanied by NDMA-receptor-driven calcium events in the distal dendrites of sensory neurons (Larkum, 2013).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Larkum, 2013 source
  • May combine two claims.

    Premisecitation

    Optogenetic silencing of feedback from mouse secondary motor cortex to somatosensory cortex selectively attenuates late amplification in somatosensory cortex and prevents perception.

    “If the feedback from a higher cortical area, the mouse secondary motor cortex, back to somatosensory cortex is silenced optogenetically, the late amplification in the somatosensory cortex is selectively attenuated and perception is prevented (Manita et al., 2015).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Manita et al., 2015 source
  • May combine two claims.

    Premisecitation

    Long-latency evoked potentials are preferentially susceptible to general anesthesia, whereas short-latency potentials are preserved.

    “In the clinical setting, for example, it is well known that long-latency-evoked potentials are preferentially susceptible to general anesthesia, whereas short-latency potentials are preserved (Banoub et al., 2003).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Banoub et al., 2003 source
  • May combine two claims.

    Premisecitation

    Recent experiments support the view that whenever information in working memory must be transformed, an active form of working memory is reinstated and a decodable state of activity reemerges, accompanied by classical signatures of conscious access.

    “Recent experiments support this view; whenever the information in working memory must be transformed, an active form of working memory is reinstated, and a decodable state of activity reemerges, accompanied by classical signatures of conscious access (Trübutschek et al., 2019).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Trübutschek et al., 2019 source
  • May combine two claims.

    Interpretationnone given

    The attended working memory item is conscious and uses the GNW for broadcasting.

    “We propose that the attended working memory item is conscious and uses the GNW for broadcasting.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Ma et al. (2019) found hypersynchrony between frontal eye fields and lateral intraparietal area in monkeys anesthetized with propofol, a mechanism that would restrict information transfer.

    “For example, Ma et al., (2019) found hypersynchrony, also a mechanism that would restrict information transfer, between frontal eye fields and the lateral intraparietal area in monkeys anesthetized with propofol.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Ma et al., (2019)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Additional working memory items can be stored as short-term changes in synaptic weights so that their representation can be quickly reinstalled when useful, a form called activity-silent working memory.

    “Mongillo and colleagues proposed that the additional working memory items can also be stored as short-term changes in synaptic weights so that their representation can be quickly reinstalled when useful (Mongillo et al., 2008), a form of working memory that is called “activity-silent.””
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Mongillo et al., 2008 source
  • May combine two claims.

    Interpretationreasoning

    Working memory is conscious only when coded by global, highly distributed persistent neural firing, as occurs during initial encoding, later refresh, and when the memory item influences other mental processing steps.

    “Thus, we propose that working memory is conscious only when it is coded by global, highly distributed persistent neural firing, as occurs during both initial encoding, during the later refresh stage, and when the memory item influences other mental processing steps.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    Periodic refreshing may correspond to early psychological conceptions of working memory as a decaying buffer requiring regular rehearsal.

    “Such periodic refreshing may correspond to early psychological conceptions of working memory as a decaying buffer that requires regular rehearsal to be refreshed (Baddeley, 2012).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Baddeley, 2012 source
  • May combine two claims.

    Premisecitation

    Disruption of GNW functional interactions during general anesthesia may be partly mediated by thalamic effects; the thalamus is depressed by virtually all sedative-hypnotic drugs except ketamine.

    “The disruption of functional interactions of the GNW during general anesthesia may, in part, be mediated by effects on the thalamus, which is depressed by virtually all sedative-hypnotic drugs (with the exception of ketamine) (Mashour and Alkire, 2013a).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Mashour and Alkire, 2013a

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    Disruption of conscious access would reduce the probability of information being available to other cognitive systems, including working memory, which may comprehensively account for the functional outcome of general anesthesia in routine clinical care.

    “Such a disruption would reduce the probability of information being available to other cognitive systems, including working memory, which may comprehensively account for the functional outcome of general anesthesia in routine clinical care.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    Anesthetics can render the brain persistently isoelectric, completely disrupting information processing.

    “On one end of the spectrum, anesthetics can render the brain persistently isoelectric, thereby completely disrupting information processing.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    Activity-silent working memories, although capable of bridging delays, differ from active states: only active neural states can be mentally transformed, e.g., by mental rotation, whereas activity-silent states merely store previously computed states and should be termed short-term memory.

    “Crucially, this view predicts that activity-silent working memories, although capable of bridging over delays, differ in an important way: only active neural states can be mentally transformed, e.g., by mental rotation, whereas activity-silent states merely store previously computed states (and thus should be more appropriately termed short-term memory).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    Clinically, the two major therapeutic traits of the anesthetized state are hypnosis and amnesia.

    “Clinically, the two major therapeutic traits of the anesthetized state are hypnosis and amnesia.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    A key correlate of REM-sleep dreaming involves GNW structures, and this correlation occurs in the absence of report.

    “Thus, a key correlate of REM-sleep dreaming involves structures of the GNW, and, importantly, this correlation happens in the absence of report (which occurs only after waking).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisereasoning

    IIT minimizes the relevance of the prefrontal cortex and considers a posterior cortical hot zone sufficient for conscious experience.

    “IIT, on the other hand, minimizes the relevance of the prefrontal cortex and, based on anatomical considerations, considers a posterior complex—the so-called posterior cortical “hot zone”—to be sufficient for conscious experience.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisenone given

    GNW theory is representational and views consciousness as an evolved neurocomputational system enabling global sharing of representations.

    “The GNW theory is representational in nature and views consciousness as an evolved neurocomputational system that enables the global sharing of representations.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationnone given

    The effects of general anesthetics in suppressing recurrent processing, both locally and globally, are broadly consistent with all four theories.

    “For example, the effects of general anesthetics in suppressing recurrent processing (both locally and globally) are broadly consistent with all four theories.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    GNW relies on well-defined neuronal architectures, including cellular and molecular mechanisms that extract, represent, and manipulate information from outside and inside the brain.

    “The GNW relies upon well-defined neuronal architectures, including cellular and molecular mechanisms of information processing that extract, represent, and manipulate information originating from both outside the brain (from interactions with the environment) and inside the brain (from spontaneous activity patterns).”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Dreaming during REM sleep has been argued to represent proto-consciousness, a building block for conscious experience during wakefulness.

    “Indeed, it is dreaming during REM sleep that has been argued to represent “proto-consciousness,” a building block for conscious experience during wakefulness (Hobson, 2009).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Hobson, 2009 source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    For HOTs, the prefrontal cortex generates a second-order metacognitive representation of a first-order state.

    “For HOTs, the role of the prefrontal cortex is to generate a second-order, metacognitive representation of a first-order state (e.g., one generated by primary sensory cortex).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisenone given

    During sleep, the brain loses its normal level or state of conscious processing and loses the capacity to access specific sensory contents.

    “During sleep, the brain not only loses its normal level or state of conscious processing (and occasionally gains access to internally generated dreams), but also loses the capacity to access specific sensory contents.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisenone given

    IIT is ostensibly a theory of phenomenal consciousness, whereas GNW focuses on conscious access and processing and questions the distinction between phenomenal and access consciousness.

    “Furthermore, IIT is ostensibly a theory of phenomenal consciousness, whereas the GNW theory is focused on conscious access and processing and, furthermore, brings into question the very distinction between phenomenal and access consciousness.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    GNW proposes that conscious access requires a more extensive architecture of reverberant loops, including frontal-parietal regions enabling access of a representation to a wider array of modular processors.

    “By contrast, the GNW proposes that conscious access requires a more extensive architecture of reverberant loops, including frontal-parietal regions that enable access of a given representation to a wider array of modular processors.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    It remains difficult to draw firm conclusions about support for specific theories of conscious processing because of lesion heterogeneity and possible covert consciousness in behavioral unresponsiveness.

    “Although there is an abundance of neuroimaging studies focused on pathologic disorders of consciousness, it remains difficult to draw firm conclusions regarding support for specific theories of conscious processing because of the heterogeneity of lesions and the possibility of covert consciousness in the setting of behavioral unresponsiveness.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    RPT shares with GNW the postulate that feedforward processing is not sufficient for conscious processing, whereas feedback from higher-order to lower-order areas is critical.

    “The RPT of consciousness (Lamme, 2006, 2010) also shares with the GNW the postulate that, given a hierarchically ordered neurocognitive architecture, feedforward processing is not sufficient for conscious processing, whereas feedback from higher-order to lower-order areas is critical.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Lamme, 2006, 2010

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisereasoning

    No clear function is assigned to consciousness according to HOT.

    “By contrast, there is no clear function assigned to consciousness according to HOT.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    Results from the perturbational complexity index, though inspired by IIT, are fully compatible with GNW, which predicts that the conscious state leads to deeper and more prolonged propagation of activation through long-distance connections than the unconscious state.

    “Although this experiment was inspired by an alternative theory of consciousness (integrated information theory [IIT], discussed further below), the results are fully compatible with the GNW, which predicts that the conscious state leads to a deeper and more prolonged propagation of activation through long-distance connections compared to the unconscious state.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    REM-sleep dreaming is associated with metabolic deactivation of the dorsolateral prefrontal cortex and is still associated with high-frequency activity in the prefrontal cortex.

    “As noted, REM-sleep dreaming, during which there is a metabolic deactivation of the dorsolateral prefrontal cortex (Maquet et al., 1996), is still associated with high-frequency activity in the prefrontal cortex.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Maquet et al., 1996 source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Global broadcasting is an important function associated with consciousness according to GNW.

    “Furthermore, global broadcasting is an important function associated with consciousness according to the GNW theory.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Non-sensory thalamic nuclei play a role in working memory and facilitate coordination of cortical communication important to a functional GNW.

    “In addition to its role in transmitting arousal and sensory signals, non-sensory nuclei of the thalamus are thought to play a role in working memory (outlined above) and to facilitate the coordination of cortical communication (Saalmann et al., 2012, 2014), which is important to a functional GNW.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Saalmann et al., 2012, 2014

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisereasoning

    For higher-order theory, the meta-representation is the mechanism by which a first-order representation becomes conscious, so the prefrontal cortex is the ultimate source of consciousness.

    “Since, for higher-order theory, the meta-representation is the mechanism by which a first-order representation becomes conscious, the prefrontal cortex is the ultimate source of consciousness.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    In RPT, re-entrant or feedback processes within sensory processing pathways are considered sufficient for phenomenal experience.

    “In RPT, which has focused primarily on the visual modality, re-entrant or feedback processes within sensory processing pathways are considered sufficient for phenomenal experience.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    GNW and IIT both require integrated neural processing beyond the level of primary sensory cortex.

    “Although the GNW and IIT are superficially aligned regarding certain aspects of how conscious processes are generated—e.g., both require integrated neural processing beyond the level of primary sensory cortex—these two theories are grounded in foundationally different perspectives of brain function.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    Both GNW and IIT ascribe importance to neural activity beyond early sensory cortices, neural information sharing, and recurrent connections as a mechanism of integration.

    “Both the GNW and IIT ascribe importance to neural activity beyond early sensory cortices, neural information sharing, and recurrent connections as a mechanism of integration.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    The prefrontal cortex is one of the nodes of the highly distributed GNW network.

    “As noted, the prefrontal cortex is one of the nodes of the highly distributed GNW network.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Transcranial direct-current stimulation of the dorsolateral prefrontal cortex may transiently enhance the level of consciousness in some minimally conscious state patients, and similar observations exist in normal subjects.

    “Transcranial direct-current stimulation of the dorsolateral prefrontal cortex may also transiently enhance the level of consciousness in some patients in a minimally conscious state (Thibaut et al., 2014, 2015), and similar observations exist in normal subjects (Douglas et al., 2015).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Thibaut et al., 2014, 2015

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Douglas et al., 2015 source
  • May combine two claims.

    Premisecitation

    An elevated threshold for conscious perception has been reported in patients with frontal-lobe syndrome, neglect, multiple sclerosis, or schizophrenia and related to abnormal long-distance fiber tracts measured by diffusion tensor imaging.

    “Indeed, an elevated threshold for conscious perception has been reported in patients with frontal-lobe syndrome, neglect, multiple sclerosis, or schizophrenia and related to abnormal long-distance fiber tracts, as measured by diffusion tensor imaging (Del Cul et al., 2009; Pettersson-Yeo et al., 2011; Reuter et al., 2007, 2009; Thiebaut de Schotten et al., 2005).”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Del Cul et al., 2009 source
    • cites Pettersson-Yeo et al., 2011 source
    • cites Reuter et al., 2007, 2009

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisenone given

    IIT proposes that the system is closed and non-representational, with information abstractly generated by the system and for the system.

    “By contrast, IIT proposes that the system (e.g., the brain, in a biological instantiation) is closed and non-representational; information is abstractly generated by the system and for the system.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    The elementary mechanisms underlying ignition are already present in infancy, though they mature and accelerate during development.

    “These results therefore reveal that the elementary mechanisms underlying ignition are already present in infancy—although they undoubtedly undergo a maturation and an acceleration during development, in addition to the development of more elaborate higher-order processes.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationnone given

    The GNW hypothesis is bringing considerable coherence to otherwise distant fields of research.

    “Indeed, the GNW hypothesis is bringing considerable coherence to otherwise distant fields of research.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    25- to 30-week preterm babies can process tactile and painful stimuli in the sensory cortex, discriminate sounds, and perceive pain.

    “25- to 30-week preterm babies can already process tactile and painful stimuli in the sensory cortex (Bartocci et al., 2006), discriminate sounds (Mahmoudzadeh et al., 2013), and perceive pain (Bembich et al., 2016).”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Bartocci et al., 2006 source
    • cites Mahmoudzadeh et al., 2013 source
    • cites Bembich et al., 2016 source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    There is currently no good theory of how the brain achieves meta-representations, though algorithmic models are beginning to be formulated within lambda calculus.

    “There is currently no good theory of how the brain achieves such meta-representations, although algorithmic models are beginning to be formulated within the abstract framework of lambda calculus (Goodman and Frank, 2016).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Goodman and Frank, 2016 source
  • May combine two claims.

    Premisecitation

    Primary sensorimotor areas develop earlier than adjacent unimodal associative cortices, while higher-order associative regions and their long-range connectivity develop later and slowly over decades.

    “Primary sensorimotor areas develop earlier than adjacent unimodal associative cortices, whereas higher-order associative regions and their long-range connectivity further develop later and slowly over decades (Dubois et al., 2014; Lebenberg et al., 2019).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Dubois et al., 2014 source
    • cites Lebenberg et al., 2019 source
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    The GNW hypothesis has thus far received substantial experimental support.

    “The GNW hypothesis—even in its simple and limited original formulation—has thus far received substantial experimental support.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    The same regions appear to be involved during self-consciousness and during representation of other people's thoughts (theory of mind).

    “Interestingly, the same regions appear to be involved during self-consciousness and during the representation of other people’s thoughts (theory of mind).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Intracranial recordings indicate that the early ERN does not predict next-trial slowing; bridging across time associated with error awareness relies on late sustained, integrative, and synchronous neural firing.

    “Furthermore, intracranial recordings indicate that the early ERN is not predic-tive of whether subjects will react more slowly on the next trial but rather that such bridging across time, putatively associated with error awareness, relies on late sustained, integrative, and synchronous neural firing (Fu et al., 2019).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Fu et al., 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    As in sensory access, the first approximately 200 ms of firing corresponding to the ERN can occur for non-conscious errors, whereas late ignition occurs only when the error is consciously detected.

    “As in sensory access, the first ∼200 ms of firing, corresponding to the ERN, can occur even for non-conscious errors, whereas the late ignition occurs only when the error is consciously detected (Nieuwenhuis et al., 2001).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Nieuwenhuis et al., 2001 source
  • Classified as probably not a substantial claim.

    Premisecitation

    When conscious intention and the actual ongoing response diverge, an error is detected.

    “When the conscious intention and the actual ongoing response diverge, as may occur due to differential noise or conflicting stimuli, an error is detected (Charles et al., 2013, 2014).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Charles et al., 2013, 2014

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S1 (asserted), S3 (load-bearing).

    Interpretationcitation

    The human brain may host an internal model of its own attention, an attention schema similar to the body schema, serving as a basis for subjective awareness.

    “For instance, the human brain may also host an internal model of its own attention, an “attention schema” similar to the “body schema,” that serves as a basis for our subjective sense of awareness (Graziano et al., 2019).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Graziano et al., 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Within the first year of life, all GNW areas become active, including the prefrontal cortex, but lack of myelination makes them very slow to process information.

    “Within the first year of life, all GNW areas quickly become active, including the prefrontal cortex, although their lack of myelination renders them very slow to process information (Dehaene-Lambertz and Spelke, 2015).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Dehaene-Lambertz and Spelke, 2015 source
  • May combine two claims.

    Premisecitation

    In simple motor tasks, erroneous responses elicit an early error-related negativity from the pre-supplementary motor area and dorsal anterior cingulate cortex, followed by later ignition of a late positive response similar to the P3 wave.

    “In simple motor tasks, erroneous responses elicit an early error-related negativity (ERN) arising from the pre-supplementary motor area and the dorsal anterior cingulated cortex (Fu et al., 2019), followed by a later igni-tion of a late positive response (the error-positivity [PE], similar to the P3 wave).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Fu et al., 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    A multisite, preregistered, adversarial collaboration testing the main predictions of GNW versus IIT using fMRI, MEG, and intracranial recordings during passive viewing and active dual-tasking is currently underway.

    “A multisite, preregistered, adversarial collaboration testing the main predictions of the GNW versus IIT using fMRI, MEG, and intracranial recordings during passive viewing and active dual-tasking is currently underway (Reardon, 2019).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Reardon, 2019 source
  • Probably not a substantial claim: may not pass S1 (asserted), S3 (load-bearing).

    Interpretationcitation

    The current hypothesis is that error detection involves a simple consistency check between a fast non-conscious route linking perception to action and a slower conscious route computing the intended response.

    “The current hypothesis is that of a simple consistency check between two simultaneous processes: a fast, non-conscious route linking perception to action and a slower, conscious route that computes the intended response.”
    Quote in the paperNot a substantial claim
120 of 120
  • The authors state this as an assumption.

    The second stage of the simulation is mediated by slower NMDA-mediated feedback connections.

    “In a second stage, assumed to be mediated by the slower NMDA-mediated feedback connections”
  • The paper relies on this without support.

    Severe encephalitis caused by antibodies against NMDA receptors produces psychotic symptoms and then complete loss of consciousness.

    “In fact, a severe form of encephalitis due to antibodies against NMDA receptors leads to psychotic symptoms followed by a complete loss of consciousness, suggesting a causal link between NMDA-mediated top-down connectivity and conscious perception.”
  • The authors state this as an assumption.

    Some degree of functional architecture among GNW nodes is preserved during anesthesia.

    “Even assuming some degree of preserved functional architecture among nodes of the GNW during anesthesia (as in Figure 5)”
  • The authors state this as an assumption.

    Social consciousness engages cortical areas including the superior temporal sulcus, temporoparietal junction, and medial prefrontal cortex, mostly in the right hemisphere.

    “Social consciousness is assumed to engage cortical areas, including the superior temporal sulcus, the temporoparietal junction, and the medial prefrontal cortex, mostly in the right hemisphere (Graziano and Kastner, 2011).”
4 of 4

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Before this study, predictions from IIT and GNWT were typically tested with one data modality at a time, leaving room for negative results to be easily attributed to the limitations of the chosen modality.

    “Before this study, predictions from IIT and GNWT were typically tested with one data modality at a time23,24, leaving room for negative results to be easily attributed to the limitations of the chosen modality51.”

    From Adversarial testing of global neuronal workspace and integrated information theories of consciousness (2025) · cites this paper as [23]

    The Conclusions (page unavailable) say that direct tests comparing GNW with other theories were emerging and that a study testing GNW against IIT with fMRI, MEG, and intracranial recordings was underway. They do not establish that earlier tests typically used one data modality at a time. The separate claim about attributing negative results to modality limitations is cited to another source (51). (LLM, conf=0.72)

    Experimental — accuracy not yet measured
  • Now both GNWT and IIT increasingly try to explain processes, contents, and states/levels of consciousness.

    “However, now both theories increasingly try to explain processes, contents, and states/levels, 28,16 a tendency shared with RPT, PP/NREP, and DIT.12,14,56”

    From An integrative, multiscale view on neural theories of consciousness (2024) · cites this paper as [28]

    The Introduction (page unavailable) explicitly says the review addresses GNW’s relevance to both the level and content of conscious processing. Its section on other theories describes IIT’s account of conscious experience, how conscious processes are generated, and the degree of consciousness. These passages support the broad overlap, but do not establish that both theories are increasingly trying to explain all three categories. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • Global workspace theorists have pointed out that the high density of long-range excitatory pyramidal neurons found in the ACC could plausibly serve as a substrate for a highly integrative function, such as consciousness.

    “Global workspace theorists have also pointed out that the high density of long-range excitatory pyramidal neurons found in the ACC could plausibly serve as a substrate for a highly integrative function, such as consciousness (Dehaene and Changeux, 2011;Mashour et al., 2020).”

    From Does the Prefrontal Cortex Play an Essential Role in Consciousness? Insights from Intracranial Electrical Stimulation of the Human Brain (2021) · cites this paper as Mashour et al., 2020

    The Introduction’s “Central Tenets and Neuroanatomical Basis” section (page not provided) describes long-range excitatory pyramidal neurons as part of the global neuronal workspace and names the anterior cingulate cortex as a potentially important hub. It attributes a greater density of neurons important for global broadcasting to the prefrontal cortex generally, but does not establish a high density of those neurons specifically in the ACC. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • There is extensive evidence for global workspace theory, drawn from many studies.

    “There is extensive evidence for global workspace theory, drawn from many studies, of which we can mention only a few representative examples (see Dehaene 2014 andMashour et al. 2020 for reviews).”
  • This widespread activity seems to arise late in perceptual processing, around 250-300ms after stimulus onset, supporting the claim that global broadcast requires sustained perceptual representations.

    “This widespread activity seems to arise late in perceptual processing, around 250-300ms after stimulus onset, supporting the claim that global broadcast requires sustained perceptual representations (Mashour et al. 2020).”

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Authors
Mashour, G. A., Roelfsema, P., Changeux, J.-P., & Dehaene, S.
Affiliations
  • University of Michigan (US)
  • Netherlands Institute for Neuroscience (NL)
  • Centre National de la Recherche Scientifique (FR)
  • Université Paris-Sud (FR)
Corresponding author
  • Changeux, Jean-Pierre
  • Dehaene, Stanislas
Venue
Neuron
Publisher
Elsevier BV
Published
2020-03
Volume
105
Issue
5
Pages
776-798
ISSN
0896-6273 (ISSN-L)
OpenAlex
W3009555114
Cited by
1,164
References
260
Citations by year
2026: 269 · 2025: 197 · 2024: 209 · 2023: 163 · 2022: 159 · 2021: 107 · 2020: 58 · 2019: 2
FWCI
17.75
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • KNAW research portal (Royal Academy of Art and Sciences (KNAW)) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (acceptedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, cc-by-nc-nd)
  • HAL (submittedVersion, cc-by-nc)
  • Pure Amsterdam UMC (submittedVersion)
  • VU Research Portal (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Funders
National Institutes of Health
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Philosophy and Theoretical Science
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
consciousness, conscious processing, recurrent processing, neural representations, general anesthesia, attention, working memory, neural correlates of consciousness
MeSH terms
Anesthesia, General, Attention, Brain, Cognition, Consciousness, Humans, Memory, Short-Term, Neurons, Psychological Theory

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read under definition version 3 (extract-v3) on 2026-09-28.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-09-28.

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