Integrating Visual and Tactile Information in the Perirhinal Cortex

J. S. Holdstock, J. Hocking, P. Notley, J. T. Devlin and C. J. Price (2009) Integrating Visual and Tactile Information in the Perirhinal Cortex. Cerebral Cortex, 19 12: 2993-3000. doi:10.1093/cercor/bhp073


Author J. S. Holdstock
J. Hocking
P. Notley
J. T. Devlin
C. J. Price
Title Integrating Visual and Tactile Information in the Perirhinal Cortex
Journal name Cerebral Cortex   Check publisher's open access policy
ISSN 1047-3211
1460-2199
Publication date 2009-12-01
Sub-type Article (original research)
DOI 10.1093/cercor/bhp073
Open Access Status Not Open Access
Volume 19
Issue 12
Start page 2993
End page 3000
Total pages 7
Editor Pasko Rakic
Place of publication United Kingdom
Publisher Oxford University Press
Language eng
Subject C1
110999 Neurosciences not elsewhere classified
970117 Expanding Knowledge in Psychology and Cognitive Sciences
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.
Keyword cross-modal
fMRI
integration
perception
visual-tactile
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Sun, 29 Nov 2009, 10:04:38 EST