Human visual cortical responses to specular and matte motion flows

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dc.citation.issueNumberOCTOBERen_US
dc.citation.volumeNumber9en_US
dc.contributor.authorKam, T.-E.en_US
dc.contributor.authorMannion, D.J.en_US
dc.contributor.authorLee, S.-W.en_US
dc.contributor.authorDoerschner, K.en_US
dc.contributor.authorKersten, D.J.en_US
dc.date.accessioned2016-02-08T11:03:43Z
dc.date.available2016-02-08T11:03:43Z
dc.date.issued2015en_US
dc.departmentDepartment of Psychologyen_US
dc.description.abstractDetermining the compositional properties of surfaces in the environment is an important visual capacity. One such property is specular reflectance, which encompasses the range from matte to shiny surfaces. Visual estimation of specular reflectance can be informed by characteristic motion profiles; a surface with a specular reflectance that is difficult to determine while static can be confidently disambiguated when set in motion. Here, we used fMRI to trace the sensitivity of human visual cortex to such motion cues, both with and without photometric cues to specular reflectance. Participants viewed rotating blob-like objects that were rendered as images (photometric) or dots (kinematic) with either matte-consistent or shiny-consistent specular reflectance profiles. We were unable to identify any areas in low and mid-level human visual cortex that responded preferentially to surface specular reflectance from motion. However, univariate and multivariate analyses identified several visual areas; V1, V2, V3, V3A/B, and hMT+, capable of differentiating shiny from matte surface flows. These results indicate that the machinery for extracting kinematic cues is present in human visual cortex, but the areas involved in integrating such information with the photometric cues necessary for surface specular reflectance remain unclear. © 2015 Kam, Mannion, Lee, Doerschner and Kersten.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T11:03:43Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2015en
dc.identifier.doi10.3389/fnhum.2015.00579en_US
dc.identifier.issn16625161
dc.identifier.urihttp://hdl.handle.net/11693/26707
dc.language.isoEnglishen_US
dc.publisherFrontiers Media S. Aen_US
dc.relation.isversionofhttp://dx.doi.org/10.3389/fnhum.2015.00579en_US
dc.source.titleFrontiers in Human Neuroscienceen_US
dc.subjectClassificationen_US
dc.subjectFunctional magnetic resonance imaging (fMRI)en_US
dc.subjectMotion flowen_US
dc.subjectSurface materialsen_US
dc.subjectVisual perceptionen_US
dc.subjectArticleen_US
dc.subjectassociation cortexen_US
dc.subjectcontrolled studyen_US
dc.subjectevoked cortical responseen_US
dc.subjectfunctional magnetic resonance imagingen_US
dc.subjecthumanen_US
dc.subjectinformation processingen_US
dc.subjectnormal humanen_US
dc.subjectsecondary visual cortexen_US
dc.subjectstriate cortexen_US
dc.subjectvisual area V3en_US
dc.subjectvisual area V4en_US
dc.subjectvisual cortexen_US
dc.subjectvisual informationen_US
dc.titleHuman visual cortical responses to specular and matte motion flowsen_US
dc.typeArticleen_US

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