Journal
CEREBRAL CORTEX
Volume 30, Issue 12, Pages 6325-6335Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhaa188
Keywords
areal parcellation; boundary mapping; functional connectivity; inferior frontal gyrus; stop-signal task
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Funding
- JSPS KAKENHI [18K07348, 19K07807]
- Takeda Science Foundation
- Grants-in-Aid for Scientific Research [19K07807, 18K07348] Funding Source: KAKEN
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The right inferior frontal cortex (IFC) is critical to response inhibition. The right IFC referred in the human studies of response inhibition is located in the posterior part of the inferior frontal gyrus and the surrounding regions and consists of multiple areas that implement distinct functions. Recent studies using resting-state functional connectivity have parcellated the cerebral cortex and revealed across-subject variability of parcel-based cerebrocortical networks. However, how the right IFC of individual brains is functionally organized and what functional properties the IFC parcels possess regarding response inhibition remain elusive. In the present functional magnetic resonance imaging study, precision functional mapping of individual human brains was adopted to the parcels in the right IFC to evaluate their functional properties related to response inhibition. The right IFC consisted of six modules or subsets of subregions, and the spatial organization of the modules varied considerably across subjects. Each module revealed unique characteristics of brain activity and its correlation to behavior related to response inhibition. These results provide updated functional features of the IFC and demonstrate the importance of individual-focused approaches in studying response inhibition in the right IFC.
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