Task-dependent warping of semantic representations during search for visual action categories

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buir.contributor.authorShahdloo, Mo
buir.contributor.authorÇelik, Emin
buir.contributor.authorBurcu A., Urgen
buir.contributor.authorÇukur, Tolga
buir.contributor.orcidShahdloo, Mo|0000-0003-1935-3845
buir.contributor.orcidBurcu A., Urgen|0000-0001-9664-0309
buir.contributor.orcidÇukur, Tolga|0000-0002-2296-851X
dc.citation.epage6799en_US
dc.citation.issueNumber35en_US
dc.citation.spage6782en_US
dc.citation.volumeNumber42en_US
dc.contributor.authorShahdloo, Mo
dc.contributor.authorÇelik, Emin
dc.contributor.authorUrgen, Burcu A.
dc.contributor.authorGallant, J.L.
dc.contributor.authorÇukur, Tolga
dc.date.accessioned2023-02-27T07:18:50Z
dc.date.available2023-02-27T07:18:50Z
dc.date.issued2022-08-31
dc.departmentNational Magnetic Resonance Research Center (UMRAM)en_US
dc.description.abstractObject and action perception in cluttered dynamic natural scenes relies on efficient allocation of limited brain resources to prioritize the attended targets over distractors. It has been suggested that during visual search for objects, distributed semantic representation of hundreds of object categories is warped to expand the representation of targets. Yet, little is known about whether and where in the brain visual search for action categories modulates semantic representations. To address this fundamental question, we studied brain activity recorded from five subjects (one female) via functional magnetic resonance imaging while they viewed natural movies and searched for either communication or locomotion actions. We find that attention directed to action categories elicits tuning shifts that warp semantic representations broadly across neocortex and that these shifts interact with intrinsic selectivity of cortical voxels for target actions. These results suggest that attention serves to facilitate task performance during social interactions by dynamically shifting semantic selectivity toward target actions and that tuning shifts are a general feature of conceptual representations in the brain.en_US
dc.identifier.doi10.1523/JNEUROSCI.1372-21.2022en_US
dc.identifier.eissn1529-2401
dc.identifier.urihttp://hdl.handle.net/11693/111791
dc.language.isoEnglishen_US
dc.publisherThe Journal of Neuroscienceen_US
dc.relation.isversionofhttps://doi.org/10.1523/JNEUROSCI.1372-21.2022en_US
dc.source.titleJournal of Neuroscienceen_US
dc.subjectAttentionen_US
dc.subjectfMRIen_US
dc.subjectNatural moviesen_US
dc.subjectVisual actionsen_US
dc.subjectVoxelwise modelingen_US
dc.titleTask-dependent warping of semantic representations during search for visual action categoriesen_US
dc.typeArticleen_US
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National Magnetic Resonance Research Center (UMRAM)
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