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.

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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.

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38 citations in Web of Science®
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ID Code: 74095
Item Type: Journal Article
Refereed: Yes
Additional Information: Articles free to read on journal website after 12 months
Holdstock, J S
Hocking, J
Notley, P
Devlin, J T
Price, C J
072282/Z/03/Z/Wellcome Trust/United Kingdom
082420/Wellcome Trust/United Kingdom
Research Support, Non-U.S. Gov't
New York, N.Y. : 1991
2009/04/24 09:00
Cereb Cortex. 2009 Dec;19(12):2993-3000. doi: 10.1093/cercor/bhp073. Epub 2009 Apr 22.
Keywords: Adult, *Brain Mapping, Entorhinal Cortex/*physiology, Somatosensory/*physiology, Visual/*physiology, Female, Humans, Male, Touch/*physiology, Visual Perception/*physiology
DOI: 10.1093/cercor/bhp073
ISSN: 1460-2199
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NEUROSCIENCES (110900) > Neurosciences not elsewhere classified (110999)
Australian and New Zealand Standard Research Classification > PSYCHOLOGY AND COGNITIVE SCIENCES (170000) > PSYCHOLOGY (170100) > Sensory Processes Perception and Performance (170112)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Deposited On: 17 Jul 2014 23:54
Last Modified: 22 Jun 2017 01:01

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