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Cerebral Cortex Advance Access originally published online on January 11, 2006
Cerebral Cortex 2006 16(12):1766-1770; doi:10.1093/cercor/bhj111
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© The Author 2006. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Visual Area V5/MT Remembers "What" but Not "Where"

Gianluca Campana1,2, Alan Cowey2 and Vincent Walsh3

1 Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131 Padova, Italy, 2 Department of Experimental Psychology, University Oxford, South Parks Road, Oxford OX1 3UD, UK, 3 Institute of Cognitive Neuroscience and Department of Psychology, University College of London, 17 Queen Square, London WC1N 3AR, UK

Address correspondence to Gianluca Campana, Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131 Padova, Italy. Email: gianluca.campana{at}unipd.it.

Priming for motion direction has been shown to depend upon the functional integrity of extrastriate area V5/MT. Its retinotopic organization and the interactions recently found between motion adaptation and misperceived localization may suggest, for this area, a role for priming of spatial position in addition to the established priming of motion direction. Disruption of V5/MT with repetitive transcranial magnetic stimulation during the intertrial interval had the effect of abolishing priming of motion direction but no effect in priming of spatial position. These effects cannot be explained in terms of perception or task demands but only in terms of the effects of information irrelevant to the correct performance of the task stored over the intertrial interval. We suggest that the attribute of spatial position might be stored in short-term memory either in earlier areas of the motion pathways such as V3 or in higher cortical areas traditionally associated with the analysis of spatial information, for example, posterior parietal cortex or the frontal eye fields.

Key Words: motion direction • priming • spatial position • TMS, V5/MT


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