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  Contrasting semantic versus inhibitory processing in the angular gyrus: An fMRI study

Lewis, G. A., Poeppel, D., & Murphy, G. L. (2019). Contrasting semantic versus inhibitory processing in the angular gyrus: An fMRI study. Cerebral Cortex, 29(6), 2470-2481. doi:10.1093/cercor/bhy118.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-6D41-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-6D42-8
Genre: Journal Article

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 Creators:
Lewis, Gwyneth A.1, Author
Poeppel, David1, 2, Author              
Murphy, Gregory L.1, Author
Affiliations:
1Department of Psychology, New York University, 6 Washington Place, New York, NY 10003, USA, ou_persistent22              
2Department of Neuroscience, Max Planck Institute for Empirical Aesthetics, Max Planck Society, ou_2421697              

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Free keywords: angular gyrus, fMRI, taxonomic categories, concepts, thematic relations
 Abstract: Recent studies of semantic memory have focused on dissociating the neural bases of two foundational components of human thought: taxonomic categories, which group similar objects like dogs and seals based on features, and thematic categories, which group dissimilar objects like dogs and leashes based on events. While there is emerging consensus that taxonomic concepts are represented in the anterior temporal lobe, there is disagreement over whether thematic concepts are represented in the angular gyrus (AG). We previously found AG sensitivity to both kinds of concepts; however, some accounts suggest that such activity reflects inhibition of irrelevant information rather than thematic activation. To test these possibilities, an fMRI experiment investigated both types of conceptual relations in the AG during two semantic judgment tasks. Each task trained participants to give negative responses (inhibition) or positive responses (activation) to word pairs based on taxonomic and thematic criteria of relatedness. Results showed AG engagement during both negative judgments and thematic judgments, but not during positive judgments about taxonomic pairs. Together, the results suggest that activity in the AG reflects functions that include both thematic (but not taxonomic) processing and inhibiting irrelevant semantic information.

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Language(s): eng - English
 Dates: 2018-05-102019-06-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1093/cercor/bhy118
 Degree: -

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Title: Cerebral Cortex
Source Genre: Journal
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Publ. Info: New York, NY : Oxford University Press
Pages: - Volume / Issue: 29 (6) Sequence Number: - Start / End Page: 2470 - 2481 Identifier: ISSN: 1047-3211
CoNE: https://pure.mpg.de/cone/journals/resource/954925592440