Does area V3A predict positions of moving objects?

Maus, G.W., Weigelt, S., Nijhawan, R. and Muckli, L. (2010) Does area V3A predict positions of moving objects? Frontiers in Psychology, 1(186), (doi: 10.3389/fpsyg.2010.00186) (PMID:21897824) (PMCID:PMC3158432)

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A gradually fading moving object is perceived to disappear at positions beyond its luminance detection threshold, whereas abrupt offsets are usually localized accurately. What role does retinotopic activity in visual cortex play in this motion-induced mislocalization of the endpoint of fading objects? Using functional magnetic resonance imaging (fMRI), we localized regions of interest (ROIs) in retinotopic maps abutting the trajectory endpoint of a bar moving either toward or away from this position while gradually decreasing or increasing in luminance. Area V3A showed predictive activity, with stronger fMRI responses for motion toward versus away from the ROI. This effect was independent of the change in luminance. In Area V1 we found higher activity for high-contrast onsets and offsets near the ROI, but no significant differences between motion directions. We suggest that perceived final positions of moving objects are based on an interplay of predictive position representations in higher motion-sensitive retinotopic areas and offset transients in primary visual cortex.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Muckli, Professor Lars
Authors: Maus, G.W., Weigelt, S., Nijhawan, R., and Muckli, L.
Subjects:B Philosophy. Psychology. Religion > BF Psychology
College/School:College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
College of Science and Engineering > School of Psychology
Journal Name:Frontiers in Psychology
Published Online:12 November 2010

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
474481Brain processes predicting forthcoming perception - cortical feedback and visual predictionsLars MuckliBiotechnology and Biological Sciences Research Council (BBSRC)BB/G005044/1INP - CENTRE FOR COGNITIVE NEUROIMAGING