Document Detail


Transcranial magnetic stimulation of extrastriate cortex degrades human motion direction discrimination.
MedLine Citation:
PMID:  7941409     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The human temporo-parieto-occipital junction is an extrastriate visual area that may mediate motion vision processing. We determined if transcranial magnetic stimulation (TMS) delivered over this extrastriate area would degrade motion discrimination, similar to the transient decrease in spatial acuity observed when TMS is delivered over striate cortex. TMS was delivered 50-250 msec after the onset of a brief, random dot, motion direction discrimination task or a spatial acuity task. TMS significantly reduced correct motion discrimination when delivered 100-150 msec after the random dot stimulus. During the same time window TMS did not significantly effect spatial acuity. TMS over the left extrastriate cortex reduced motion discrimination in both hemifields and its effect had a crude topographical organization. TMS safely perturbs extrastriate visual areas and may reveal the temporal sequence of higher perceptual processing.
Authors:
J Hotson; D Braun; W Herzberg; D Boman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  34     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1994 Aug 
Date Detail:
Created Date:  1994-11-01     Completed Date:  1994-11-01     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  2115-23     Citation Subset:  IM; S    
Affiliation:
Department of Neurology and Neurological Sciences, Santa Clara Valley Medical Center, San Jose, CA 95128.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Brain Mapping
Cerebral Cortex / physiology*
Discrimination (Psychology) / physiology
Electromagnetic Fields*
Humans
Middle Aged
Motion Perception / physiology*
Visual Acuity / physiology
Visual Cortex / physiology
Grant Support
ID/Acronym/Agency:
EY03387/EY/NEI NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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