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Vision of the body modulates processing in primary somatosensory cortex

Longo, Matthew R. and Pernigo, S. and Haggard, P. (2011) Vision of the body modulates processing in primary somatosensory cortex. Neuroscience Letters 489 (3), pp. 159-163. ISSN 0304-3940.

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Official URL: http://dx.doi.org/10.1016/j.neulet.2010.12.007

Abstract

Viewing the body affects somatosensory processing, even when entirely non-informative about stimulation. While several studies have reported effects of viewing the body on cortical processing of touch and pain, the neural locus of this modulation remains unclear. We investigated whether seeing the body modulates processing in primary somatosensory cortex (SI) by measuring short-latency somatosensory evoked-potentials (SEPs) elicited by electrical stimulation of the median nerve while participants looked directly at their stimulated hand or at a non-hand object. Vision of the body produced a clear reduction of the P27 component of the SEP recorded over contralateral parietal channels, which is known to reflect processing in SI. These results provide the first direct evidence that seeing the body modulates processing in SI and demonstrate that vision can affect even the earliest stages of cortical somatosensory processing.

Item Type: Article
Keyword(s) / Subject(s): SI, somatosensory evoked potential, body representation
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Psychological Sciences
Depositing User: Administrator
Date Deposited: 27 Jan 2011 13:56
Last Modified: 17 Apr 2013 12:20
URI: http://eprints.bbk.ac.uk/id/eprint/2986

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