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Brain Cogn. 2007 Jun;64(1):104-9. Epub 2006 Nov 22.

Spatial limits on referred touch to an alien limb may reflect boundaries of visuo-tactile peripersonal space surrounding the hand.

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School of Psychological Sciences, The University of Manchester, Zochonis Building, Brunswick Street, Oxford Rd, Manchester, M13 9PL, UK.


In this study, the spatial limits of referred touch to a rubber hand were investigated. Participants rated the strength of the perceived illusion when the rubber hand was placed in one of six different spatial positions (at a distance of 17.5-67.5cm horizontal from the participant's own hand). The results revealed a significant nonlinear relationship in the strength of the illusion, with the strongest ratings given when the two hands were closest; decaying significantly after a distance of 30cm. The time taken to elicit the illusion followed a similar trend. These results may reflect the response properties of bimodal visuo-tactile cells encoding peripersonal space around the hand.

[Indexed for MEDLINE]

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