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dc.contributor.authorPenacchio, Olivier
dc.contributor.authorOtazu, Xavier
dc.contributor.authorDempere-Marco, Laura
dc.identifier.citationPenacchio , O , Otazu , X & Dempere-Marco , L 2013 , ' A neurodynamical model of brightness induction in V1 ' , PLoS One .
dc.identifier.otherPURE: 103104749
dc.identifier.otherPURE UUID: 114f655f-14fa-4785-9ca0-660123a6df18
dc.identifier.otherScopus: 84878022170
dc.description.abstractBrightness induction is the modulation of the perceived intensity of an area by the luminance of surrounding areas. Recent neurophysiological evidence suggests that brightness information might be explicitly represented in V1, in contrast to the more common assumption that the striate cortex is an area mostly responsive to sensory information. Here we investigate possible neural mechanisms that offer a plausible explanation for such phenomenon. To this end, a neurodynamical model which is based on neurophysiological evidence and focuses on the part of V1 responsible for contextual influences is presented. The proposed computational model successfully accounts for well known psychophysical effects for static contexts and also for brightness induction in dynamic contexts defined by modulating the luminance of surrounding areas. This work suggests that intra-cortical interactions in V1 could, at least partially, explain brightness induction effects and reveals how a common general architecture may account for several different fundamental processes, such as visual saliency and brightness induction, which emerge early in the visual processing pathway.
dc.relation.ispartofPLoS Oneen
dc.rights© 2013 Penacchio et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en
dc.subjectPrimary Visual Cortexen
dc.subjectContextual influencesen
dc.subjectSpatial-frequency channelsen
dc.subjectNeural dynamicsen
dc.subjectSaliency mapen
dc.subjectIntracortical interactionsen
dc.subjectRC0321 Neuroscience. Biological psychiatry. Neuropsychiatryen
dc.titleA neurodynamical model of brightness induction in V1en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Psychology and Neuroscienceen
dc.description.statusPeer revieweden

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