Grey matter volume in early human visual cortex predicts proneness to the sound-induced flash illusion
Identifieur interne : 002427 ( Main/Merge ); précédent : 002426; suivant : 002428Grey matter volume in early human visual cortex predicts proneness to the sound-induced flash illusion
Auteurs : Benjamin De Haas [Royaume-Uni] ; Ryota Kanai [Royaume-Uni] ; Lauri Jalkanen [Royaume-Uni] ; Geraint Rees [Royaume-Uni]Source :
- Proceedings of the Royal Society B: Biological Sciences [ 0962-8452 ] ; 2012.
Abstract
Visual perception can be modulated by sounds. A drastic example of this is the sound-induced flash illusion: when a single flash is accompanied by two bleeps, it is sometimes perceived in an illusory fashion as two consecutive flashes. However, there are strong individual differences in proneness to this illusion. Some participants experience the illusion on almost every trial, whereas others almost never do. We investigated whether such individual differences in proneness to the sound-induced flash illusion were reflected in structural differences in brain regions whose activity is modulated by the illusion. We found that individual differences in proneness to the illusion were strongly and significantly correlated with local grey matter volume in early retinotopic visual cortex. Participants with smaller early visual cortices were more prone to the illusion. We propose that strength of auditory influences on visual perception is determined by individual differences in recurrent connections, cross-modal attention and/or optimal weighting of sensory channels.
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DOI: 10.1098/rspb.2012.2132
PubMed: 23097516
PubMed Central: 3497249
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strict</wicri:regionArea></affiliation></author><author><name sortKey="Jalkanen, Lauri" sort="Jalkanen, Lauri" uniqKey="Jalkanen L" first="Lauri" last="Jalkanen">Lauri Jalkanen</name><affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>University College London Institute of Cognitive Neuroscience, 17 Queen Square, London WC1N 3BG</addr-line>,<country>UK</country></nlm:aff><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Rees, Geraint" sort="Rees, Geraint" uniqKey="Rees G" first="Geraint" last="Rees">Geraint Rees</name><affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>University College London Institute of Cognitive Neuroscience, 17 Queen Square, London WC1N 3BG</addr-line>,<country>UK</country></nlm:aff><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="af2"><addr-line>Wellcome Trust Centre for Neuroimaging</addr-line>,<institution>University College London</institution>,<addr-line>12 Queen Square, London WC1N 3AR</addr-line>,<country>UK</country></nlm:aff><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Proceedings of the Royal Society B: Biological Sciences</title><idno type="ISSN">0962-8452</idno><idno type="eISSN">1471-2954</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Visual perception can be modulated by sounds. A drastic example of this is the sound-induced flash illusion: when a single flash is accompanied by two bleeps, it is sometimes perceived in an illusory fashion as two consecutive flashes. However, there are strong individual differences in proneness to this illusion. Some participants experience the illusion on almost every trial, whereas others almost never do. We investigated whether such individual differences in proneness to the sound-induced flash illusion were reflected in structural differences in brain regions whose activity is modulated by the illusion. We found that individual differences in proneness to the illusion were strongly and significantly correlated with local grey matter volume in early retinotopic visual cortex. Participants with smaller early visual cortices were more prone to the illusion. We propose that strength of auditory influences on visual perception is determined by individual differences in recurrent connections, cross-modal attention and/or optimal weighting of sensory channels.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Shams, L" uniqKey="Shams L">L. Shams</name></author><author><name sortKey="Kamitani, Y" uniqKey="Kamitani Y">Y. Kamitani</name></author><author><name sortKey="Shimojo, S" uniqKey="Shimojo S">S. Shimojo</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Colavita, F B" uniqKey="Colavita F">F. B. Colavita</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ernst, M O" uniqKey="Ernst M">M. O. Ernst</name></author><author><name sortKey="Banks, M S" uniqKey="Banks M">M. S. Banks</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shams, L" uniqKey="Shams L">L. 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Kwong</name></author><author><name sortKey="Belliveau, J W" uniqKey="Belliveau J">J. W. Belliveau</name></author><author><name sortKey="Brady, T J" uniqKey="Brady T">T. J. Brady</name></author><author><name sortKey="Rosen, B R" uniqKey="Rosen B">B. R. Rosen</name></author><author><name sortKey="Tootell, R B" uniqKey="Tootell R">R. B. Tootell</name></author></analytic></biblStruct></listBibl></div1></back></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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