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| Research article summary (published 18 Nov 2002): |
Visual-tactile spatial interaction in saccade generation.
Full Abstract
Saccadic reaction times to visual targets tend to be faster when non-visual stimuli are presented in close temporal or spatial proximity even if subjects are instructed to ignore the accessory input. The effect tends to decrease with increasing spatial distance between the stimuli. Multisensory interaction effects measured in neural structures involved in saccade generation have demonstrated a similar spatial dependence. The present study investigated visual-tactile interaction effects on saccadic reaction time using a focused attention paradigm. Compared to unimodal visual targets saccadic reaction time to bimodal stimuli was reduced by up to 30 ms. The effect was larger for ipsi- than for contralateral presentations, and it increased with the eccentricity of the visual target. The results are consistent with attributing part of the facilitation to a multisensory effect of bimodal neurons with overlapping visual and tactile receptive field structures in the deep layers of the superior colliculus.
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Author information
Author/s: Diederich, Adele (A); Colonius, Hans (H); Bockhorst, Daniela (D); Tabeling, Sandra (S);
Affiliation: School of Humanities and Social Sciences, International University Bremen, Bremen, Germany.
Journal and publication information
Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't
Journal: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale (Exp Brain Res), published in Germany. (Language: eng)
Reference: 2003-Feb; vol 148 (issue 3) : pp 328-37
Dates: Created 2003/01/23; Completed 2003/04/23; Revised 2008/02/15;
PMID: 12541144, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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