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Regional Specialization and Coordination Within the Network for Perceiving and Knowing About Others
Aidas Aglinskas1, Scott L Fairhall1
1Center for Mind/Brain Sciences, University of Trento, Corso Bettini 31, Rovereto, Italy.
Cerebral Cortex (New York, N.Y. : 1991)
|July 25, 2019
Summary
Brain imaging reveals how we store knowledge about people. Different brain regions specialize in social, episodic, semantic, physical, and nominal information, showing a network for person knowledge.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Familiar faces trigger rich person-related knowledge recall.
- Encoding this information within the brain's face-/person-selective network is not fully understood.
Purpose of the Study:
- Investigate how different domains of person knowledge are represented in the brain.
- Examine the functional organization of the person knowledge network using network-level representational similarity analysis (NetRSA).
Main Methods:
- Functional magnetic resonance imaging (fMRI) study.
- Participants rated famous faces across 10 tasks spanning 5 domains: social, episodic, semantic, physical, and nominal knowledge.
- Multivariate network-level representational similarity analysis (NetRSA) was applied.
Main Results:
- Multiple cognitive domains were important in most brain regions.
- The anterior temporal lobe showed a preference for social over nominal knowledge.
- The temporoparietal junction was functionally subdivided into perceptual (superior temporal sulcus) and knowledge-related (angular gyrus) areas.
- NetRSA identified a division between default-mode and fronto-lateral cognitive regions.
- Semantic retrieval processes were found to be more similar to episodic than nominal knowledge.
Conclusions:
- The findings highlight the coordinated activity within the person knowledge network.
- This network supports diverse cognitive capacities related to person perception and knowledge retrieval.
- The study provides insights into the system-level organization of person knowledge in the brain.
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