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A large-scale structural and functional connectome of social mentalizing
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A large-scale structural and functional connectome of social mentalizing
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Journal Article
A large-scale structural and functional connectome of social mentalizing
2021
Overview
Humans have a remarkable ability to infer the mind of others. This mentalizing skill relies on a distributed network of brain regions but how these regions connect and interact is not well understood. Here we leveraged large-scale multimodal neuroimaging data to elucidate the brain-wide organization and mechanisms of mentalizing processing. Key connectomic features of the mentalizing network (MTN) have been delineated in exquisite detail. We found the structural architecture of MTN is organized by two parallel subsystems and constructed redundantly by local and long-range white matter fibers. We uncovered an intrinsic functional architecture that is synchronized according to the degree of mentalizing, and its hierarchy reflects the inherent information integration order. We also examined the correspondence between the structural and functional connectivity in the network and revealed their differences in network topology, individual variance, spatial specificity, and functional specificity. Finally, we scrutinized the connectome resemblance between the default mode network and MTN and elaborated their inherent differences in dynamic patterns, laterality, and homogeneity. Overall, our study demonstrates that mentalizing processing unfolds across functionally heterogeneous regions with highly structured fiber tracts and unique hierarchical functional architecture, which make it distinguishable from the default mode network and other vicinity brain networks supporting autobiographical memory, semantic memory, self-referential, moral reasoning, and mental time travel.
Publisher
Elsevier Inc,Elsevier Limited,Elsevier
Subject
/ Cerebral Cortex - anatomy & histology
/ Cerebral Cortex - diagnostic imaging
/ Cerebral Cortex - physiology
/ Default Mode Network - anatomy & histology
/ Default Mode Network - diagnostic imaging
/ Default Mode Network - physiology
/ Humans
/ Nerve Net - anatomy & histology
/ Nerve Net - diagnostic imaging
