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Related Experiment Videos

A relation between rest and the self in the brain?

Bruno Wicker1, Perrine Ruby, Jean-Pierre Royet

  • 1Institut de Neurosciences Physiologiques et Cognitives, CNRS, 31 Chemin Joseph Aiguier, 13009 Marseille, France.

Brain Research. Brain Research Reviews
|October 24, 2003
PubMed
Summary

Resting-state neuroimaging reveals specific brain regions, including the cingulate gyrus and medial frontal gyrus, are more active during rest than during cognitive tasks. This suggests the resting brain focuses inward, potentially on self-referential processing.

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Area of Science:

  • Neuroimaging
  • Cognitive Neuroscience
  • Brain Activity Analysis

Background:

  • Neuroimaging techniques like PET and fMRI are crucial for understanding cognitive processes.
  • The resting state, while a useful reference, is variable and ill-defined.
  • Identifying brain areas more active during rest than cognitive tasks is a key challenge.

Purpose of the Study:

  • To perform a meta-analysis of five studies investigating brain activity during rest versus cognitive tasks.
  • To identify common brain regions showing greater activity in the resting state across diverse cognitive tasks.
  • To hypothesize the function of these brain regions during rest.

Main Methods:

  • Meta-analysis of five neuroimaging studies.
  • Utilized the general linear model to assess statistical differences.

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  • Calculated contrasts of resting state activity minus activity during specific cognitive tasks.
  • Identified the intersection of these contrasts to find commonly activated regions.

    • Main Results:

    • A meta-analysis of five studies identified common brain regions with higher activity during rest.
    • Key areas include the anterior cingulate gyrus and medial/superior frontal gyrus.
    • These regions showed greater activity during rest compared to tasks involving intention attribution, pleasantness judgment, spatial discrimination, belief judgment, and gaze perception.

    Conclusions:

    • The medial prefrontal cortex shows decreased activity when attention is externally focused.
    • Resting state activity in these regions is higher than during both externally and internally directed attention.
    • Hypothesizes that the resting state involves self-referential processing, where individuals focus on their internal states.