Forster, B.

Gillmeister, H.

City Research Online

Forster, B. & Gillmeister, H. (2009). VIEWING FINGERS OF THE SAME HAND CAN DISTURB TACTILE ATTENTIONAL SELECTION. PSYCHOPHYSIOLOGY, 46, S121 - S121. City Research OnlineOriginal citation: Forster, B. & Gillmeister, H. (2009). VIEWING FINGERS OF THE SAME HAND CAN DISTURB TACTILE ATTENTIONAL SELECTION. PSYCHOPHYSIOLOGY, 46, S121 - S121. Permanent City Research Online URL: http://openaccess.city.ac.uk/4548/ Copyright & reuseCity University London has developed City Research Online so that its users may access the research outputs of City University London's staff. Copyright © and Moral Rights for this paper are retained by the individual author(s) and/ or other copyright holders.  All material in City Research Online is checked for eligibility for copyright before being made available in the live archive. URLs from City Research Online may be freely distributed and linked to from other web pages. Versions of researchThe version in City Research Online may differ from the final published version. Users are advised to check the Permanent City Research Online URL above for the status of the paper.EnquiriesIf you have any enquiries about any aspect of City Research Online, or if you wish to make contact with the author(s) of this paper, please email the team at publications@city.ac.uk.PSYCHOPHYSIOLOGY Volume 46, Issue s1, September 2009, s121, DOI: 10.1111/j.1469-8986.2009.00920.x    VIEWING FINGERS OF THE SAME HAND CAN DISTURB TACTILE ATTENTIONAL SELECTION  Bettina Forster, & Helge Gillmeister City University London  Descriptors: tactile, attention, somatosensory erps  Viewing the body has been shown to enhance tactile spatial resolution by modifying the cortical representation of the viewed body part in primary somatosensory cortex (SI). Here we report that vision can have detrimental effects on tactile spatial processing when adjacent  body parts that compete for attentional selection are viewed simultaneously. In Experiment 1, we used somatosensory event-related potentials(ERPs) to demonstrate that viewing two fingers of the same hand substantially delays selecting one over the other. Importantly, a detrimental effect of vision does not arise when selecting between fingers of different hands. In Experiment 2, we replicated the within-hand selection task and manipulated hand posture. We found that the detrimental effect of vision on tactile attentional selection depends on the separation of adjacent fingers in external space. Taken together, we peopose that visual exposure disturbs tactile selection by smearing the cortical boundaries of adjacent finger representations in S1, only, when these are viewed close together.      

VIEWING FINGERS OF THE SAME HAND CAN DISTURB TACTILE ATTENTIONAL SELECTION

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