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Task Encoding across the Multiple Demand Cortex Is Consistent with a Frontoparietal and Cingulo-Opercular Dual

Ben M Crittenden1, Daniel J Mitchell2, John Duncan3

  • 1Medical Research Council, Cognition and Brain Science Unit, Cambridge CB2 7EF, United Kingdom, University of Cambridge, Cambridge CB2 7EF, United Kingdom, Centre for Functional Magnetic Resonance Imaging of the Brain, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford 0X3 9DU, United Kingdom, and ben.crittenden@ndcn.ox.ac.uk.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
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PubMed
Summary
This summary is machine-generated.

The brain's multiple-demand (MD) regions coactivate during tasks, but functional MRI reveals distinct frontoparietal (FP) and cingulo-opercular (CO) subnetworks with specialized roles in task encoding.

Keywords:
cognitive controldual networksexecutive functionmultiple demand

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience

Background:

  • Multiple-demand (MD) brain regions are critical for executive functions and problem-solving.
  • Previous research suggests MD regions comprise two subnetworks: frontoparietal (FP) and cingulo-opercular (CO).

Purpose of the Study:

  • To investigate the functional division and specialization of MD subnetworks during executive task performance using on-task fMRI.
  • To determine if the FP and CO subnetworks differentially encode task-relevant information.

Main Methods:

  • On-task functional magnetic resonance imaging (fMRI) was employed during an executive task.
  • Functional connectivity analysis was used to assess relationships between MD regions.
  • Multivoxel pattern analysis (MVPA) was applied to decode task-specific information.

Main Results:

  • Activity across the entire MD cortex was correlated during task performance.
  • Stronger functional connectivity was observed within each subnetwork (FP and CO) than between them.
  • The FP subnetwork showed higher classification accuracy, indicating more differentiated coding of task events compared to the CO subnetwork.

Conclusions:

  • The MD cortex exhibits a nested organization, with overall coactivation and broad rule representation.
  • Significant functional distinctions exist between the FP and CO subnetworks, with the FP subnetwork showing specialized coding for specific task events.