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Varieties of perceptual instability and their neural correlates.

Ishizu, T; Zeki, S; (2014) Varieties of perceptual instability and their neural correlates. Neuroimage , 91 pp. 203-209. 10.1016/j.neuroimage.2014.01.040. Green open access

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Abstract

We report experiments designed to learn whether different kinds of perceptually unstable visual images engage different neural mechanisms. 21 subjects viewed two types of bi-stable images while we scanned the activity in their brains with functional magnetic resonance imaging (fMRI); in one (intra-categorical type) the two percepts remained within the same category (e.g. face-face) while in the other (cross-categorical type) they crossed categorical boundaries (e.g. face-body). The results showed that cross- and intra-categorical reversals share a common reversal-related neural circuitry, which includes fronto-parietal cortex and primary visual cortex (area V1). Cross-categorical reversals alone engaged additional areas, notably anterior cingulate cortex and superior temporal gyrus, which have been posited to be involved in conflict resolution.

Type: Article
Title: Varieties of perceptual instability and their neural correlates.
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.neuroimage.2014.01.040
Publisher version: http://dx.doi.org/10.1016/j.neuroimage.2014.01.040
Additional information: © 2014 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).
Keywords: Ambiguity, Anterior cingulate cortex, Conflict resolution, Cross categorical boundary, Perceptual reversal
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Cell and Developmental Biology
URI: http://discovery.ucl.ac.uk/id/eprint/1426491
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