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    STRUCTURAL AND FUNCTIONAL CEREBELLAR NETWORKS IN THEORY OF MIND

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    Genre
    Thesis/Dissertation
    Date
    2020
    Author
    Metoki, Athanasia cc
    Advisor
    Olson, Ingrid R.
    Committee member
    Chein, Jason M.
    Murty, Vishnu
    Wright, Geoffrey W.
    Peng, Huiling
    Dosenbach, Nico
    Department
    Psychology
    Subject
    Neurosciences
    Cognitive psychology
    Cerebellum
    Effective connectivity
    Mentalizing
    Social cognition
    Theory of Mind
    Tractography
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/4738
    
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    DOI
    http://dx.doi.org/10.34944/dspace/4720
    Abstract
    Theory of Mind (ToM) is the ability to infer mental states of others and this skill relies on a distributed network of brain regions. A brain region that has been traditionally disregarded in relation to non-motor functions is the cerebellum. Here, we leveraged large-scale multimodal neuroimaging data to elucidate the structural and functional role of the cerebellum in ToM. We used functional activations to determine whether the cerebellum has a domain-general or domain-specific functional role. We found that the cerebellum is organized in a domain-specific way. We used effective connectivity and probabilistic tractography to map the cerebello-cerebral ToM network. We found a left cerebellar effective and structural lateralization, with more and stronger effective connections from the left cerebellar hemisphere to the contralateral cerebral ToM areas and greater cerebello-thalamo-cortical (CTC) and cortico-ponto-cerebellar (CPC) streamline counts from and to the left cerebellum. Lastly, we examined the relationship between CTC and CPC white matter and ToM speed and accuracy but found no correlation. Our study provides novel insights to the network organization of the cerebellum, an overlooked brain structure, and ToM, one of humans’ most essential abilities to navigate the social world.
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