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Integrating visual and tactile information in the perirhinal cortex

Holdstock, J. S.; Hocking, J.; Notley, P.; Devlin, J. T.; Price, C. J.; (2009) Integrating visual and tactile information in the perirhinal cortex. Cerebral Cortex , 19 (12) pp. 2993-3000. 10.1093/cercor/bhp073. Green open access

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Abstract

By virtue of its widespread afferent projections, perirhinal cortex is thought to bind polymodal information into abstract object-level representations. Consistent with this proposal, deficits in cross-modal integration have been reported after perirhinal lesions in nonhuman primates. It is therefore surprising that imaging studies of humans have not observed perirhinal activation during visual–tactile object matching. Critically, however, these studies did not differentiate between congruent and incongruent trials. This is important because successful integration can only occur when polymodal information indicates a single object (congruent) rather than different objects (incongruent). We scanned neurologically intact individuals using functional magnetic resonance imaging (fMRI) while they matched shapes. We found higher perirhinal activation bilaterally for cross-modal (visual–tactile) than unimodal (visual–visual or tactile–tactile) matching, but only when visual and tactile attributes were congruent. Our results demonstrate that the human perirhinal cortex is involved in cross-modal, visual–tactile, integration and, thus, indicate a functional homology between human and monkey perirhinal cortices.

Type: Article
Title: Integrating visual and tactile information in the perirhinal cortex
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/cercor/bhp073
Publisher version: http://dx.doi.org/10.1093/cercor/bhp073
Language: English
Additional information: © 2009 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords: Cross-modal, fMRI, integration, perception, visual–tactile
UCL classification: UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Experimental Psychology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Imaging Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/20055
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