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Cerebral Cortex
Article
License: implied-oa
Data sources: UnpayWall
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PubMed Central
Article . 2009
Data sources: PubMed Central
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UCL Discovery
Article . 2009
Data sources: UCL Discovery
Cerebral Cortex
Article . 2009 . Peer-reviewed
Data sources: Crossref
Cerebral Cortex
Article . 2010
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Integrating Visual and Tactile Information in the Perirhinal Cortex

Authors: Holdstock, J; Hocking, Julia; Notley, P; Devlin, J; Price, C;

Integrating Visual and Tactile Information in the Perirhinal Cortex

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.

Countries
United Kingdom, Australia
Keywords

Adult, Male, Somatosensory/*physiology, 150, integration, perception, Entorhinal Cortex/*physiology, *Brain Mapping, C1, Cross-modal, Evoked Potentials, Somatosensory, Entorhinal Cortex, Humans, Visual/*physiology, 110999 Neurosciences not elsewhere classified, Brain Mapping, Touch/*physiology, 970117 Expanding Knowledge in Psychology and Cognitive Sciences, fMRI, visual-tactile, Articles, cross-modal, Visual Perception/*physiology, Touch, Visual Perception, Evoked Potentials, Visual, Female, visual–tactile

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    71
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
71
Top 10%
Top 10%
Top 10%
Green
hybrid