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| Research article summary (published 27 Feb 2002): |
The finger in flight: real-time motor control by visually masked color stimuli.
Full Abstract
Current theories of dual visual systems suggest that color is processed in a ventral cortical stream that eventually gives rise to visual awareness but is only indirectly involved in visuomotor control mediated by the dorsal stream. If the dorsal stream is indeed less sensitive to color than the ventral stream, color stimuli blocked from awareness by visual masking should also be blocked from guiding fast motor responses. In this study, pointing movements to one of two isoluminant color targets were preceded by consistent or inconsistent color primes. Trajectories were strongly affected by priming, with kinematics implying a continuous flow of color information into executive brain areas while the finger was already moving. Motor effects were more sensitive to color of the primes than were deliberate attempts to identify the primes in forced-choice tasks based on visual awareness. Priming was observed even when masking was complete.
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Author information
Author/s: Schmidt, Thomas (T);
Affiliation: Institute of Psychology, University of Göttingen, Germany. thomas.schmidt(-atsign-)psych.uni-goettingen.de
Journal and publication information
Publication Type: Journal Article
Journal: Psychological science : a journal of the American Psychological Society / APS (Psychol Sci), published in United States. (Language: eng)
Reference: 2002-Mar; vol 13 (issue 2) : pp 112-8
Dates: Created 2002/04/05; Completed 2002/10/29; Revised 2004/11/17;
PMID: 11933993, 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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