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| Research article summary (published 30 Mar 2003): |
Graspable objects grab attention when the potential for action is recognized.
Full Abstract
Visually guided grasping movements require a rapid transformation of visual representations into object-specific motor programs. Here we report that graspable objects may facilitate these visuomotor transformations by automatically grabbing visual spatial attention. Human subjects viewed two task-irrelevant objects--one was a 'tool', the other a 'non-tool'--while waiting for a target to be presented in one of the two object locations. Using event-related potentials (ERPs), we found that spatial attention was systematically drawn to tools in the right and lower visual fields, the hemifields that are dominant for visuomotor processing. Using event-related fMRI, we confirmed that tools grabbed spatial attention only when they also activated dorsal regions of premotor and prefrontal cortices, regions associated with visually guided actions and their planning. Although it is widely accepted that visual sensory gain aids perception, our results suggest that it may also have consequences for object-directed actions.
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Author information
Author/s: Handy, Todd C (TC); Grafton, Scott T (ST); Shroff, Neha M (NM); Ketay, Sarah (S); Gazzaniga, Michael S (MS);
Affiliation: Center for Cognitive Neuroscience, 6162 Moore Hall, Dartmouth College, Hanover, New Hampshire 03755, USA. todd.c.handy@dartmouth.edu
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.
Journal: Nature neuroscience (Nat Neurosci), published in United States. (Language: eng)
Reference: 2003-Apr; vol 6 (issue 4) : pp 421-7
Dates: Created 2003/03/26; Completed 2003/06/10; Revised 2006/11/15;
PMID: 12640459, 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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