Cited by 363Functional Brain Connectivity StudiesMind wandering and attentionNeural dynamics and brain function

Consistency and functional specialization in the default mode brain network

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Harrison, Ben J., Pujol, Jesus, López-Solà, Marina, Hernández-Ribas, Rosa, Deus, Joan, Ortiz, Hector, Soriano-Mas, Carles, Yücel, Murat +2 more·2008·Proceedings of the National Academy of Sciences

Abstract

The notion of a “default mode of brain function” has taken on certain relevance in human neuroimaging studies and in relation to a network of lateral parietal and midline cortical regions that show prominent activity fluctuations during passive imaging states, such as rest. In this study, we perform three fMRI experiments that demonstrate consistency and specialization in the default mode network. Correlated activity fluctuations of default mode network regions are identified during ( i ) eyes-closed spontaneous rest, ( ii ) activation by moral dilemma, and ( iii ) deactivation by Stroop task performance. Across these imaging states, striking uniformity is shown in the basic anatomy of the default mode network, but with both tasks clearly and differentially modulating this activity compared with spontaneous fluctuations of the network at rest. Against rest, moral dilemma is further shown to evoke regionally specific activity increases of hypothesized functional relevance. Mapping spontaneous and task-related brain activity will help to constrain the meaning of the default mode network. These findings are discussed in relation to recent debate on the topic of default modes of brain function.

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Crossref · 10.1073/pnas.0711791105

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  • Functional deactivations may be as equally informative for understanding the neural substrates of complex mental activities, including emotion processing, as activations.

    “As is now broadly recognized in the neuroimaging field, functional deactivations may be as equally informative for understanding the neural substrates of complex mental activities, [8][9][10] including emotion processing.8,11,12”
  • The vmPFC and PCC are recognized as a characteristic functional signature of the human default mode network, a large-scale brain system that exhibits consistent functional decreases in activity in fMRI studies when goal-directed task performance is compared with low task demand such as passive resting states.

    “vmPFC and PCC, in particular, has become recognized as a characteristic functional signature of the human 'default mode network'-a large-scale brain system that exhibits consistent functional decreases in activity in fMRI studies when conditions of goal-directed task performance are compared with conditions of low task demand, such as passive resting states.8,9”

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Authors
Harrison, B. J., Pujol, J., López-Solà, M., Hernández-Ribas, R., Deus, J., Ortiz, H., Soriano-Mas, C., Yücel, M., Pantelis, C., & Cardoner, N.
Affiliations
  • The University of Melbourne (AU)
  • *Institut d'Alta Tecnologia-Parc de Recerca Biomèdica de Barcelona, CRC Corporació Sanitària, 08003 Barcelona, Spain;
  • Universitat Autònoma de Barcelona (ES)
  • Barcelona Biomedical Research Park (ES)
Venue
Proceedings of the National Academy of Sciences
Published
2008-07-15
Volume
105
Issue
28
Pages
9781-9786
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2156395637
Cited by
363
References
57
Citations by year
2026: 7 · 2025: 16 · 2024: 14 · 2023: 15 · 2022: 23 · 2021: 29 · 2020: 15 · 2019: 10 · 2018: 22 · 2017: 20 · 2016: 21 · 2015: 22 · 2014: 36 · 2013: 20 · 2012: 33
FWCI
10.16
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ramaciotti Foundations
  • Medical Research Council
  • National Health and Medical Research Council (350241, 400420)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Mind wandering and attention
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
default mode network, spontaneous brain activity, resting state, ethical dilemmas, Stroop task, deactivation, functional specialization, network consistency, parietal cortex
MeSH terms
Attention, Brain Mapping, Cerebral Cortex, Humans, Magnetic Resonance Imaging, Mental Processes, Morals, Neural Pathways, Rest, Task Performance and Analysis

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