Abstract:
:Here, we demonstrate a systematic shift in the perceived location of a tactile stimulus on the arm toward where the eye is looking. Participants reported the perceived position of touches presented between the elbow and the wrist while maintaining eye positions at various eccentricities. The perceived location of the touch was shifted by between 1 and 5 cm (1.9 degrees -9.5 degrees visual angle) by a change in eye position of +/-25 degrees from straight ahead. In a control condition, we repeat the protocol with the eyes fixating straight ahead. Changes in attention accounted for only 17% of the shift due to eye position. The pattern of tactile shifts due to eye position was comparable whether or not the arm was visible. However, touches at locations along the forearm were perceived as being farther apart when the arm was visible compared to when it was covered. These results are discussed in terms of the coding of tactile space, which seems to require integration of tactile, visual and eye position information.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Harrar V,Harris LRdoi
10.1007/s00221-009-1884-4subject
Has Abstractpub_date
2009-09-01 00:00:00pages
403-10issue
2-3eissn
0014-4819issn
1432-1106journal_volume
198pub_type
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