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dc.contributor.authorXu, Yaoda
dc.contributor.authorChun, Marvin M.
dc.date.accessioned2009-09-21T13:29:29Z
dc.date.issued2007
dc.identifier.citationXu, Yaoda and Marvin M. Chun. 2007. Visual grouping in human parietal cortex. Proceedings of the National Academy of Sciences of the United States of America 104(47): 18766-18771.en_US
dc.identifier.issn1091-6490en_US
dc.identifier.issn0027-8424en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:3296249
dc.description.abstractTo efficiently extract visual information from complex visual scenes to guide behavior and thought, visual input needs to be organized into discrete units that can be selectively attended and processed. One important such selection unit is visual objects. A crucial factor determining object-based selection is the grouping between visual elements. Although human lesion data have pointed to the importance of the parietal cortex in object-based representations, our understanding of these parietal mechanisms in normal human observers remains largely incomplete. Here we show that grouped shapes elicited lower functional MRI (fMRI) responses than ungrouped shapes in inferior intraparietal sulcus (IPS) even when grouping was task-irrelevant. This relative ease of representing grouped shapes allowed more shape information to be passed onto later stages of visual processing, such as information storage in superior IPS, and may explain why grouped visual elements are easier to perceive than ungrouped ones after parietal brain lesions. These results are discussed within a neural object file framework, which argues for distinctive neural mechanisms supporting object individuation and identification in visual perception.en_US
dc.description.sponsorshipPsychologyen_US
dc.language.isoen_USen_US
dc.publisherNational Academy of Sciencesen_US
dc.relation.isversionofhttp://dx.doi.org/10.1073/pnas.0705618104en_US
dc.relation.hasversionhttp://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2141851en_US
dash.licenseLAA
dc.subjectfMRIen_US
dc.subjectworking memoryen_US
dc.subjectvisual attentionen_US
dc.subjectobject processingen_US
dc.subjectbrain imagingen_US
dc.subjectfunctional MRIen_US
dc.titleVisual Grouping in Human Parietal Cortexen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalProceedings of the National Academy of Sciencesen_US
dash.depositing.authorXu, Yaoda
dc.date.available2014-10-22T07:30:37Z
dc.identifier.doi10.1073/pnas.0705618104*
workflow.legacycommentsBrightening on 10/21/2014, per new OSC interpretation of PNAS policy.
dash.contributor.affiliatedXu, Yaoda


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