A double dissociation between striate and extrastriate visual cortex for pattern motion perception revealed using rTMS.

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dc.contributor.author Thompson, Benjamin en
dc.contributor.author Aaen-Stockdale, C en
dc.contributor.author Koski, L en
dc.contributor.author HESS, RF en
dc.date.accessioned 2012-03-09T02:28:29Z en
dc.date.issued 2009 en
dc.identifier.citation Human Brain Mapping 30(10):3115-3126 Oct 2009 en
dc.identifier.issn 1065-9471 en
dc.identifier.uri http://hdl.handle.net/2292/13635 en
dc.description.abstract The neural mechanisms underlying the integration and segregation of motion signals are often studied using plaid stimuli. These stimuli consist of two spatially coincident dynamic gratings of differing orientations, which are either perceived to move in two unique directions or are integrated by the visual system to elicit the percept of a checkerboard moving in a single direction. Computations pertaining to the motion of the individual component gratings are thought to take place in striate cortex (V1) whereas motion integration is thought to involve neurons in dorsal stream extrastriate visual areas, particularly V5/MT. By combining a psychophysical task that employed plaid stimuli with 1 Hz offline repetitive transcranial magnetic stimulation (rTMS), we demonstrated a double dissociation between striate and extrastriate visual cortex in terms of their contributions to motion integration. rTMS over striate cortex increased coherent motion percepts whereas rTMS over extrastriate cortex had the opposite effect. These effects were robust directly after the stimulation administration and gradually returned to baseline within 15 minutes. This double dissociation is consistent with previous patient data and the recent hypothesis that both coherent and transparent motion percepts are supported by the visual system simultaneously and compete for perceptual dominance en
dc.publisher Wiley-Blackwell en
dc.relation.ispartofseries Human Brain Mapping en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from: http://www.sherpa.ac.uk/romeo/issn/1065-9471/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title A double dissociation between striate and extrastriate visual cortex for pattern motion perception revealed using rTMS. en
dc.type Journal Article en
dc.identifier.doi 10.1002/hbm.20736 en
pubs.issue 10 en
pubs.begin-page 3115 en
pubs.volume 30 en
dc.rights.holder Copyright: Wiley-Blackwell en
dc.identifier.pmid 19224619 en
pubs.end-page 3126 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 89820 en
pubs.record-created-at-source-date 2010-09-01 en
pubs.dimensions-id 19224619 en

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