Cited by 263Motor Control and AdaptationAction Observation and SynchronizationEmbodied and Extended Cognition

Mental imagery of speech and movement implicates the dynamics of internal forward models

Open access
Tian, Xing·2010·Frontiers in Psychology

Abstract

The classical concept of efference copies in the context of internal forward models has stimulated productive research in cognitive science and neuroscience. There are compelling reasons to argue for such a mechanism, but finding direct evidence in the human brain remains difficult. Here we investigate the dynamics of internal forward models from an unconventional angle: mental imagery, assessed while recording high temporal resolution neuronal activity using magnetoencephalography. We compare two overt and covert tasks; our covert, mental imagery tasks are unconfounded by overt input/output demands - but in turn necessitate the development of appropriate multi-dimensional topographic analyses. Finger tapping (studies 1 and 2) and speech experiments (studies 3-5) provide temporally constrained results that implicate the estimation of an efference copy. We suggest that one internal forward model over parietal cortex subserves the kinesthetic feeling in motor imagery. Secondly, observed auditory neural activity ~170 ms after motor estimation in speech experiments (studies 3-5) demonstrates the anticipated auditory consequences of planned motor commands in a second internal forward model in imagery of speech production. Our results provide neurophysiological evidence from the human brain in favor of internal forward models deploying efference copies in somatosensory and auditory cortex, in finger tapping and speech production tasks, respectively, and also suggest the dynamics and sequential updating structure of internal forward models.

Integrity signals

Registry

Crossref · 10.3389/fpsyg.2010.00166

Cites

102 of 102 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

5 of 57 cited sources checked · 4 supported · 0 flagged · accuracy not yet measured

  • Premisecitation

    Support for forward models obtained from healthy people is uncommon.

    “Evidence for this important mechanism from healthy human participants is rare, although data from a variety of behavioral (e.g., Sabes, 2000) and cognitive neuroscience experiments are providing tantalizing hints (e.g., Salmelin et al., 2000; Houde et al., 2002; van Wassenhove et al., 2005; Skipper et al., 2007).”
    Quote in the paperNot a substantial claim1 of 3 sources checked
    • cites Sabes, 2000 source
    • cites Salmelin et al., 2000 source

      The Abstract and the discussion section headed ‘the word’ report MEG evidence from fluent speakers: articulatory encoding preceded motor preparation, a sequence the authors consider reasonable for fluent speech. That makes the study a plausible example of a cognitive-neuroscience hint, but our copy does not identify this sequence as evidence for a forward model or assess how rare such evidence is in healthy participants. (LLM, conf=0.76)

      Experimental — accuracy not yet measured
    • cites Houde et al., 2002 source
  • Premisecitation

    Lipreading and silent speech can produce a comparable attenuation of responses to pure tones.

    “Recently, it has been demonstrated that the tasks of lipreading and covert speech can induce a similar suppression of the auditory responses to pure tones (Kauramaki et al., 2010).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Kauramaki et al., 2010 source
  • Findingown data

    Compared with execution, the imagery response displayed a more posterior distribution over parietal areas.

    “The imagery response shows a more posterior pattern over parietal regions (bottom right plot, dipole pattern highlighted in a red box) compared with the execution response (top right plot, dipole pattern highlighted in a green box).”
    Quote in the paperSubstantial claim
  • Findingown data

    Imagery responses averaged to a location in inferior parietal cortex (Brodmann area 40), close to the anterior intraparietal sulcus.

    “Based on the relative distance between the execution and imagery responses, the mean imagery responses are located in inferior parietal cortex (Brodmann area 40) near anterior intraparietal sulcus, as illustrated in Figure 6B (Experiment 1: [−36.1 ± 6.1, −43.1 ± 6.6, 36.1 ± 5.3]; Experiment 2: [−35.1 ± 5.0, −39.6 ± 5.0, 39.4 ± 8.1]).”
    Quote in the paperSubstantial claim
  • Findingown data

    The timing of execution responses matched the median behavioral reaction times.

    “The execution response latencies were similar to behavioral median reaction times (Table 1).”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. 21
  • May combine two claims. 32
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Houde and colleagues, as well as Rauschecker and Scott, have advanced comparable models.

    “Similar models are proposed by Houde (Houde et al., 2007; Ventura et al., 2009) and Rauschecker and Scott (2009).”
    Quote in the paperNot a substantial claim1 of 3 sources checked
    • cites Houde et al., 2007 source
    • cites Ventura et al., 2009

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

    • cites Rauschecker and Scott, 2009 source
  • Probably not a substantial claim: may not pass S1 (asserted).

    Premisecitation

    Grush proposes that the proprioceptive and kinesthetic feelings experienced in motor imagery arise from emulating intended motor commands.

    “Grush (2004) further proposes, based on the notion of a Kalman filter, that the proprioceptive and kinesthetic sensations produced during motor imagery are the consequences of emulation of planned motor commands.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Grush, 2004 source
  • Classified as probably not a substantial claim.

    Premisecitation

    Motor execution and motor imagery have similar completion time courses.

    “Because previous studies suggest that the time courses for completing motor execution and imagery are comparable (Decety and Michel, 1989; Decety et al., 1989; Sirigu et al., 1995, 1996)”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Decety and Michel, 1989 source
    • cites Decety et al., 1989

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

    • cites Sirigu et al., 1995

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

  • May combine two claims.

    Findingown data

    In Experiment 1, 11 of 12 participants had more posterior ECDs for imagery than execution, and in Experiment 2, 10 of 12 participants had more posterior ECD locations.

    “In Experiment 1 (Figure 6A), 11 out of 12 participants presented more posterior ECDs, whereas only one participant showed a more anterior and medial ECD (mean distance (mm) = [9.9, −27.1, −14.9]1 and SEM (mm) = [6.1, 6.6, 5.3]).”
    • Also stated in: § Finger tapping: experiments 1 and 2 · plain
      “Similar results were obtained in Experiment 2 (Figure S3 in Supplementary Material), where 10 out of 12 participants had more posterior ECD locations (mean distance (mm) = [10.9, −23.6, −11.6] and SEM (mm) = [5.0, 5.0, 8.1]).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Execution responses did not differ between Experiments 1 and 2, nor between participants who used the thumb versus the index finger.

    “There were no differences between the execution responses in Experiments 1 and 2, nor between the responses of participants using their thumb or index finger to respond.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Parietal cortex activity preceded both execution and imagery responses, consistent with motor intention research.

    “Our results demonstrate that neural activity in parietal cortex was observed prior to both execution and imagery responses, which is in agreement with motor intention studies (Snyder et al., 1997; Quiroga, 2006; Desmurget et al., 2009).”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Snyder et al., 1997 source
    • cites Quiroga, 2006

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

    • cites Desmurget et al., 2009

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

  • May combine two claims.

    Findingown data

    In Experiment 1, imagery was more posterior than execution in eleven of twelve participants; one participant instead showed a more anterior and medial pattern.

    “In Experiment 1, 11 of 12 participants showed more posterior activity in the imagery task when compared to individual execution responses, whereas only one participant showed more anterior and medial activity patterns.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    In Experiments 1 and 2, the cue-locked execution response topography became similar to the execution-locked template around execution onset, and at the execution peak there was no significant difference between within and between angle measures.

    “As depicted in Figure 5A, the between angle measure was significantly smaller prior to or after the execution onset in Experiment 1. However, the between angle measure between the cue-locked and execution-locked activity patterns began to overlap with the within angle measure as time approached the execution onset (time 0).”
    • Also stated in: § Finger tapping: experiments 1 and 2 · plain
      “No significant differences were found between the within angle measure and between angle measure in either Experiment 1, [t(11) = −1.47, p = 0.17], or Experiment 2 [t(11) = 0.72, p = 0.49].”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Execution tasks yielded a left-lateralized frontal pattern in all twelve participants, likely reflecting motor-cortex activity from right-hand finger movement.

    “In the execution tasks, the spatial activity pattern was left lateralized over frontal lobe, consistent for all 12 participants, presumably reflecting activity in motor cortex evoked by right finger movement.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Covert articulation imagery showed patterns distinct from overt articulation, with time-locked parietal activation.

    “The activity patterns for the imagery task (Figure 9A, right plot) were different from execution response, with time-locked activation appearing in parietal cortex.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    The intervals between movement intention and execution responses varied among participants, with a mean of 231.3 ms and SEM of 31.9 ms.

    “The intervals between the intention responses and execution responses varied among participants (mean = 231.3 ms, SEM = 31.9 ms).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Experiment 1 showed peaks near 550 ms for both tasks, with execution at 550 ms and imagery at 545 ms but lower amplitude.

    “The peak amplitudes of the responses occurred around 550 ms in both tasks: the execution response peaked at 550 ms (Figure 4A), and the imagery response peaked at 545 ms, though with smaller amplitude (Figure 4B).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Imagery patterns differed from execution patterns, and participants varied individually.

    “The activity patterns in the imagery task were different from those of the execution task, and individual differences appeared among participants.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Experiment 2 had peaks near 1200 ms, at 1238 ms for execution and 1244 ms for imagery, again with imagery weaker.

    “The peak amplitudes of the responses in Experiment 2 occurred around 1200 ms, with peaks at 1238 ms in the execution task, and 1244 ms in the imagery task, though again with smaller amplitude (Figure S1 in Supplementary Material).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Experiment 2 found more posterior imagery activity in ten of twelve participants, with two showing anterior and medial dipole patterns.

    “Similar results were obtained in Experiment 2, where 10 of 12 participants showed more posterior activity in the imagery task and 2 participants showed more anterior and medial dipole patterns”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    RAIA-to-imagery-articulation intervals fell within actual hearing response latencies, averaging 175.4 ms in Exp3, 170.4 ms in Exp4, and 141.5 ms in Exp5.

    “The latencies of RAIA are shown in Table 2, and the interval between the RAIA and the IA responses were in the range of actual hearing response latencies (mean = 175.4 ms, SEM = 21.1 ms in Experiment 3; mean = 170.4 ms, SEM = 18.1 ms in Experiment 4; and mean = 141.5 ms, SEM = 22.6 ms in Experiment 5).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The DIVA architecture uses a copy of the motor command to shape later motor preparation and a separate auditory copy to forecast the sound that may result.

    “In their model, an efference copy of a motor command is used to constrain further motor preparation (Guenther et al., 1998) and an additional auditory efference copy is used to predict the possible auditory outcome (Guenther et al., 2006).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Guenther et al., 1998

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

    • cites Guenther et al., 2006

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

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    Speaking aloud reduces responses to sounds presented at the same time, and this suppression has been interpreted as evidence for auditory efference copies.

    “overt speech usually has dampening effects on simultaneously presented auditory stimuli (Numminen et al., 1999; Curio et al., 2000; Houde et al., 2002), and such speaking-induced response suppression has been argued to point to auditory efference copies.”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Numminen et al., 1999 source
    • cites Curio et al., 2000

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

    • cites Houde et al., 2002 source
  • Classified as probably not a substantial claim. May combine two claims.

    Premisereasoning

    The elaborated control scheme contains two forward models: one estimates the motor state that would follow execution of intended commands, and the other forecasts the sensory effects arising from that first estimate.

    “The first model estimates what the motor state would be after executing the target motor commands. The second model predicts the sensory consequences induced by the estimation of first forward model.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Premisereasoning

    Evidence with fine temporal resolution can offer a new test of whether kinesthetic experience during motor imagery depends on an efference-copy prediction of motor state.

    “Hence, temporally constrained evidence can provide a novel test for the hypothesis that the kinesthetic feeling in motor imagery is caused by the internal prediction of motor status from an efference copy – the estimation results of the first internal forward model (Figure 1).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S1 (asserted).

    Premisecitation

    A recent account holds that awareness of movement incorporates internally estimated somatosensory effects of planned commands, generated from an efference copy in posterior parietal cortex.

    “A recent theory proposes that motor awareness is not merely the result of action execution, but includes the somatosensory consequences estimated internally from the efference copy of planned motor commands, in posterior parietal regions (Desmurget and Sirigu, 2009).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Desmurget and Sirigu, 2009

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

  • Classified as probably not a substantial claim.

    Premisecitation

    The forward-model framework holds that the brain simulates motor commands and forecasts the sensory outcomes those commands will produce.

    “Forward models incorporate at their core the presupposition that neural systems internally simulate motor (output) commands and predict their perceptual consequences (for review see Wolpert and Ghahramani, 2000).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Wolpert and Ghahramani, 2000 source
  • Classified as probably not a substantial claim.

    Premisecitation

    That study left unresolved whether the reported motor awareness came from stronger stimulation or from longer-lasting activity in posterior parietal neural populations.

    “In that case, it remained unclear whether motor awareness was caused by high stimulation intensity or prolonged activation of neural assemblies in posterior parietal cortex.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Desmurget et al., 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).

    Premisecitation

    Prior findings have been taken to support an auditory efference copy during speech production.

    “Some evidence has already been marshaled to support the existence of an auditory efference copy in speech production.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisereasoning

    During speech, the initial forward model estimates the state of the vocal tract, while the second forecasts the auditory result.

    “In speech production, the status of the vocal apparatus is estimated by the first, the auditory output is predicted by the second model.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    Several forward models have been proposed to operate during the control of ongoing speech.

    “Multiple internal forward models have been hypothesized in the online control of speech production.”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Guenther, 1995

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

    • cites Guenther et al., 1998

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

    • cites Guenther et al., 2006

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

  • Classified as probably not a substantial claim.

    Premisereasoning

    MEG supplies neural data at a useful level of detail because of its timing and adequate spatial resolution.

    “MEG was used in all experiments because its temporal resolution and suitable spatial resolution provide neurophysiological data at an appropriate granularity.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    Under identical temporal constraints, motor imagery uses a neural substrate distinct from motor execution, with parietal activity linked to imagery.

    “First, in time-cued finger tapping experiments (designed in part to develop and validate the approach to investigating mental imagery in electrophysiology) we discovered that motor imagery draws on a different neuronal substrate from motor execution under the same temporal constraints. Imagery is associated with parietal activity.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    The findings offer human neurophysiological support for forward models that use efference copies in somatosensory cortex during finger tapping and in auditory cortex during speech production.

    “Our results provide neurophysiological evidence from the human brain in favor of internal forward models deploying efference copies in somatosensory and auditory cortex, in finger tapping and speech production tasks, respectively”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The auditory M100 is a strong, reliable response occurring about 100 ms after sound onset.

    “The auditory M100 is a prominent and robust response, observed around 100 ms after auditory stimulus onset and has been a widely investigated auditory MEG response (for review see Roberts et al., 2000).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Roberts et al., 2000 source
  • May combine two claims.

    Interpretationown data

    Articulation imagery engaged posterior parietal areas rather than primary motor cortex, matching the finger movement findings from Experiments 1 and 2.

    “Both the results of visual inspection and quantitative pattern analyses show that articulation motor imagery did not activate primary motor cortex but more posterior parietal areas, consistent with the results obtained in Experiments 1 and 2 for finger movement.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    The data link kinesthetic feeling to parietal cortex activity, consistent with prior lesion and stimulation studies highlighting inferior and posterior parietal cortex in motor imagery.

    “Furthermore, our data suggest that the kinesthetic feeling is associated with activity in parietal cortex, which agrees with previous findings suggesting the importance of inferior and posterior parietal cortex during motor imagery in neurological lesion studies (Sirigu et al., 1996) and direct stimulation studies (Desmurget et al., 2009).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Sirigu et al., 1996

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

    • cites Desmurget et al., 2009

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

  • May combine two claims.

    Interpretationown data

    Covert articulation is followed by auditory cortex activation, likely the predicted perceptual outcome of estimating an auditory efference copy in the second internal forward model.

    “The results supported the view that auditory cortex is activated after covert articulation, and this auditory-like response is most likely the predicted perceptual consequence as the estimation of an auditory efference copy in the second internal forward model.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    Motor intention responses precede execution by roughly 230 ms, matching the idea that conscious intention arises about 250 ms before movement or imagery from posterior parietal cortex activity.

    “The data suggest that the motor intention responses occur ~230 ms before motor execution, consistent with the hypothesis that conscious motor intention occurs around 250 ms before movement or imagery, as a result of the neural activity in posterior parietal cortex (Desmurget and Sirigu, 2009).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Desmurget and Sirigu, 2009

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

  • May combine two claims.

    Interpretationreasoning

    Because visual imagery findings are similar, the data support a principled distinction between perceptual and motor imagery.

    “Given the similar findings on visual imagery in the literature, our data are consistent with a principled perceptual versus motor imagery distinction.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    Overt versus covert speech replicated the distinct-substrate pattern, suggesting this is a general feature of motor imagery and that kinesthetic feeling arises from internal forward model estimation.

    “This pattern was replicated for overt versus covert (imagined) speech, suggesting that it is a more general property of motor imagery, and that the kinesthetic feeling is the result of estimation in an internal forward model.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Study design and conductcitation

    The angle test of response similarity allows spatial similarity to be evaluated in electrophysiological work.

    “This technique permits the assessment of spatial similarity in electrophysiological experiments (Huber et al., 2008; Tian and Huber, 2008; Davelaar et al., submitted)”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Huber et al., 2008 source
    • cites Tian and Huber, 2008 source
    • cites Davelaar et al., submitted

      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.

    Study design and conductown data

    Head position remained largely stable across each experiment, with average coil displacement before versus after recording below 5 mm and standard error below 0.62 mm.

    “The mean distance between pre- and post-experiment coil location was less than 5 mm with SEM less than 0.62 mm in all experiments. Such small distance demonstrated that the head positions did not change much throughout the experiments.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    The short interval between movement intention and execution is presumably due to the simple task and the temporally constrained experimental design.

    “The short interval between the movement intention and execution is presumably because of the simple task and the temporally constrained experimental design.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: The simple button-pressing task requires no complex movement planning.
  • Classified as probably not a substantial claim.

    Study design and conductnone given

    The covert imagery tasks avoid confounding from overt input and output requirements.

    “our covert, mental imagery tasks are unconfounded by overt input/output demands – but in turn necessitate the development of appropriate multi-dimensional topographic analyses.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductcitation

    The multivariate method's limited spatial resolution prevents finer quantification of the neural ensembles underlying overt stimulation, covert imagery, and the auditory efference copy; fMRI is needed for this.

    “Although the pattern similarity between overt stimulation, covert imagery, and the implicated auditory efference copy was quantified by a multivariate method, the limited spatial resolution of the method prevents more granular quantification of the neural ensembles that mediate them. High spatial resolution techniques, such as fMRI, are needed to assess this question (Zatorre and Halpern, 2005).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Zatorre and Halpern, 2005 source
  • May combine two claims.

    Interpretationcitation

    Auditory imagery and perception show similar neural responses, matching fMRI findings of shared substrates.

    “The resemblance of neural responses in auditory imagery and auditory perception (Experiments 3–5) agrees with findings that similar neural substrates mediate auditory perception and imagery in fMRI studies (Zatorre et al., 1996; Wheeler et al., 2000; Schürmann et al., 2002; Halpern et al., 2004; Aleman et al., 2005; Bunzeck et al., 2005; Zatorre et al., 2009).”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Zatorre et al., 1996 source
    • cites Wheeler et al., 2000

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

    • cites Schürmann et al., 2002 source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Mental imagery is complex and necessarily involves distributed neural systems.

    “Moreover, mental imagery is surely a complex process that must involve distributed neural systems (Mellet et al., 1998; Handy et al., 2004; Mechelli et al., 2004; Sack et al., 2008).”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Mellet et al., 1998 source
    • cites Handy et al., 2004 source
    • cites Mechelli et al., 2004

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

  • May combine two claims.

    Interpretationcitation

    Results fit a model of auditory verbal hallucinations in schizophrenia: hallucinations reflect misinterpreting self-generated vocalizations, with patients failing to predict their own articulation's consequences and attributing them externally.

    “Moreover, the results align well with a model that accounts for auditory verbal hallucinations in schizophrenia patients (for review see Frith, 2005): auditory verbal hallucinations are explained as the results of erroneous interpretations of self-generated vocalizations. That is, patients fail to predict the consequence of their own articulation, but attribute them to the external causes.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Frith, 2005

      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.

    Premisecitation

    Task demands and content can alter the neural mechanisms of mental imagery, while attention affects imagery depth and perceptual processing within a hierarchical architecture.

    “In addition, task demands and content can modulate the neural mechanisms that mediate the mental imagery (Kosslyn and Thompson, 2003; Kraemer et al., 2005), and attentional factors also influence the depth of imagery and perceptual processing in a hierarchical neural architecture (Moscovitch et al., 1994; Roland and Gulyas, 1994; Sakai and Miyashita, 1994; Mellet et al., 1998).”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Kosslyn and Thompson, 2003 source
    • cites Kraemer et al., 2005 source
    • cites Moscovitch et al., 1994 source
45 of 45
  • The authors state this as an assumption.

    Forward models are assumed to update sequentially, with each sensory prediction based on the preceding internal estimate and this process repeatable without limit.

    “A critical assumption of the theory concerns the sequential updating structure of forward models (Kawato, 1999; Hesslow, 2002; Schubotz, 2007). Specifically, a sensory consequence can be predicted based on the previous internal estimate, and this process can be iterated ad infinitum.”
  • The authors state this as an assumption.

    The kinesthetic feeling during motor imagery is assumed to occur at a latency similar to that of an overt execution response.

    “under the assumption that the kinesthetic feeling is elicited at a similar latency as the latency of an overt execution response”
  • The authors state this as an assumption.

    Motor commands are assumed to be generated during articulation imagery.

    “On the premise that motor commands are formed during articulation imagery, the potential auditory consequences can then be estimated in such an imagery task.”
  • The authors state this as an assumption.

    People are assumed to be able to simulate perception and action internally.

    “The central assumption – that people can simulate perception and action internally (Hesslow, 2002) – is supported by multiple lines of evidence.”
  • The paper relies on this without support.

    An efference copy becomes available only after motor intention.

    “because the efference copy can only be available after the motor intention”
  • The paper relies on this without support.

    The simple button-pressing task requires no complex movement planning.

    “the simple button pressing task does not require complex movement planning”
6 of 6

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?

  • Imagined speaking and hearing both localized to bilateral temporal cortex, but imagery for speaking localized first to left parietal cortex.

    “Imagined speaking and hearing both localized to bilateral temporal cortex (which was interpreted as indicating the auditory simulation process), but imagery for speaking localized first to left parietal cortex (Tian & Poeppel, 2010).”

    From Inner Speech: Development, Cognitive Functions, Phenomenology, and Neurobiology (2015) · cites this paper as Tian & Poeppel, 2010

    In Results, “Overt versus covert speech: experiments 3–5” (page unavailable), imagined hearing produced responses over bilateral temporal areas, and imagined articulation was followed by a bilateral temporal auditory-like response. The same section reports parietal activity during imagined articulation before that response, but does not localize the speech-imagery activity specifically to the left parietal cortex. The left-sided parietal localization reported elsewhere in Results concerns finger-tapping imagery. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Neuroimaging studies of inner speech have been driven primarily by an interest in the possible role of inner speech in the experience of auditory verbal hallucinations.

    “Such studies have been conducted since the earliest days of neuroimaging (McGuire et al., 1995), and have been driven primarily by an interest in the possible role of inner speech in the experience of auditory verbal hallucinations (see Adult Psychopathology), although neuroimaging research on verbal working memory (e.g., Marvel & Desmond, 2010) and imagery for speech (Tian & Poeppel, 2010) has”

    From Inner Speech: Development, Cognitive Functions, Phenomenology, and Neurobiology (2015) · cites this paper as Tian & Poeppel, 2010

Statistics recomputed

Every reported test result, recomputed from its test statistic and degrees of freedom. A result shows as not adding up only once an independent check has confirmed it.

  • Consistentt(11) = -1.47reported p = .17 · recomputed p = .170

    “t(11) = −1.47, p = .17”

  • Consistentt(11) = 0.72reported p = .49 · recomputed p = .487

    “t(11) = 0.72, p = .49”

  • Consistentt(11) = 2.89reported p < .05 · recomputed p = .015

    “t(11) = 2.89, p < .05”

  • Consistentt(11) = 2.92reported p < .05 · recomputed p = .014

    “t(11) = 2.92, p < .05”

  • Consistentt(11) = 2.38reported p < .05 · recomputed p = .037

    “t(11) = 2.38, p < .05”

  • Consistentt(11) = 2.98reported p < .05 · recomputed p = .013

    “t(11) = 2.98, p < .05”

  • Consistentt(11) = 3.81reported p < .01 · recomputed p = .003

    “t(11) = 3.81, p < .01”

  • Consistentt(11) = -0.09reported p = .93 · recomputed p = .930

    “t(11) = −0.09, p = .93”

  • Consistentt(11) = 3.22reported p < .01 · recomputed p = .008

    “t(11) = 3.22, p < .01”

  • Consistentt(11) = 3.54reported p < .005 · recomputed p = .005

    “t(11) = 3.54, p < .005”

  • Consistentt(11) = 0.33reported p = .75 · recomputed p = .748

    “t(11) = 0.33, p = .75”

  • Consistentt(11) = 3.7reported p < .005 · recomputed p = .004

    “t(11) = 3.70, p < .005”

  • Consistentt(9) = 3.31reported p < .01 · recomputed p = .009

    “t(9) = 3.31, p < .01”

  • Consistentt(9) = 2.53reported p < .05 · recomputed p = .032

    “t(9) = 2.53, p < .05”

  • Consistentt(7) = 5.42reported p < .01 · recomputed p < .001

    “t(7) = 5.42, p < .01”

  • Consistentt(9) = 0.85reported p = .42 · recomputed p = .417

    “t(9) = 0.85, p = .42”

  • Consistentt(9) = 0.48reported p = .64 · recomputed p = .643

    “t(9) = 0.48, p = .64”

  • Consistentt(7) = 1.62reported p = .15 · recomputed p = .149

    “t(7) = 1.62, p = .15”

  • Consistentt(9) = 3.48reported p < .01 · recomputed p = .007

    “t(9) = 3.48, p < .01”

  • Consistentt(9) = 2.28reported p < .05 · recomputed p = .049

    “t(9) = 2.28, p < .05”

  • Consistentt(9) = 2.71reported p < .05 · recomputed p = .024

    “t(9) = 2.71, p < .05”

  • Consistentt(9) = 2.27reported p < .05 · recomputed p = .049

    “t(9) = 2.27, p < .05”

  • Consistentt(7) = 3.81reported p < .01 · recomputed p = .007

    “t(7) = 3.81, p < .01”

  • Consistentt(7) = 2.65reported p < .05 · recomputed p = .033

    “t(7) = 2.65, p < .05”

  • Consistentt(9) = 0.72reported p = .49 · recomputed p = .490

    “t(9) = 0.72, p = .49”

  • Consistentt(9) = 0.01reported p = .99 · recomputed p = .992

    “t(9) = 0.01, p = .99”

  • Consistentt(7) = 1.49reported p = .18 · recomputed p = .180

    “t(7) = 1.49, p = .18”

  • Consistentt(9) = 4.38reported p < .01 · recomputed p = .002

    “t(9) = 4.38, p < .01”

  • Consistentt(9) = 4.92reported p < .001 · recomputed p < .001

    “t(9) = 4.92, p < .001”

  • Consistentt(9) = 2.36reported p < .05 · recomputed p = .043

    “t(9) = 2.36, p < .05”

  • Consistentt(9) = 3.23reported p < .05 · recomputed p = .010

    “t(9) = 3.23, p < .05”

  • Consistentt(7) = 5.8reported p < .001 · recomputed p < .001

    “t(7) = 5.80, p < .001”

  • Consistentt(7) = 2.47reported p < .05 · recomputed p = .043

    “t(7) = 2.47, p < .05”

33 of 33

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Self-check results appear here once an independent check has confirmed them.

Cites

Flagged first, then by citations

17 of the 119 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Tian, X.
Affiliations
New York University (US)
Corresponding author
Tian, Xing
Venue
Frontiers in Psychology
Published
2010
Volume
1
Pages
166-166
ISSN
1664-1078 (ISSN-L)
OpenAlex
W2139581981
Cited by
259
References
119
Citations by year
2026: 10 · 2025: 16 · 2024: 11 · 2023: 13 · 2022: 35 · 2021: 16 · 2020: 19 · 2019: 23 · 2018: 21 · 2017: 14 · 2016: 12 · 2015: 20 · 2014: 15 · 2013: 19 · 2012: 10
FWCI
6.40
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Psychology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Multidisciplinary University Research Initiative
  • Army Research Office
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Social Sciences › Psychology › Social Psychology › Action Observation and Synchronization
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Embodied and Extended Cognition
Keywords
efference copy, motor imagery, speech imagery, finger tapping, parietal cortex, somatosensory cortex, auditory cortex, kinesthetic feedback, motor planning, neural dynamics

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 by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-09-28.

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

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

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