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Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
12:09

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Published on: August 5, 2014

Reduced functional coupling in the default-mode network during self-referential processing.

Mariët van Buuren1, Thomas E Gladwin, Bram B Zandbelt

  • 1Department of Psychiatry, Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, the Netherlands. m.vanbuuren-2@umcutrecht.nl

Human Brain Mapping
|January 29, 2010
PubMed
Summary
This summary is machine-generated.

The default-mode network (DMN) shows specialized activity during self-referential processing. Brain regions within the DMN exhibit altered coupling, suggesting distinct roles in self-related thought.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • The default-mode network (DMN) is traditionally viewed as a unified network.
  • Emerging evidence suggests functional specialization within DMN subregions for self-referential processing.

Purpose of the Study:

  • To investigate functional specialization within the DMN.
  • To examine changes in functional coupling between DMN areas during self-referential tasks.

Main Methods:

  • fMRI data acquired during self-referential, other-referential, and control conditions.
  • fMRI signal corrected for cardiorespiratory confounds.
  • Analysis of activity and functional coupling within and between DMN regions.

Main Results:

  • Increased activity in dorsal medial prefrontal cortex, ventral medial prefrontal cortex, and posterior cingulate cortex during self-referential processing.
  • Decreased coupling between DMN areas during self-referential tasks.
  • Increased coupling between DMN and non-DMN regions during self-referential tasks.

Conclusions:

  • Findings indicate functional specialization within the DMN.
  • Suggests distinct subfunctions for different DMN areas in self-referential processing.