Document Detail

The effects of dynamic visual stimulation on perception and motor control.
MedLine Citation:
PMID:  1342403     Owner:  NLM     Status:  MEDLINE    
A set of research findings is described that deals with three principal laboratory measures of visual orientation (vection and postural and manual control). Two studies are highlighted, one of which compared the latencies of vection and visually induced postural change and the other of which investigated manual tracking under visually disorienting conditions. The first study showed that although vection and postural change are somewhat related to each other (for example, both were greater in response to roll and pitch as opposed to linear visual motion), the onset of vection is delayed by several seconds relative to the initiation of visually induced postural shifts. The second study showed that manual biases induced by visual roll motion are not overcome using a thumb-and-forefinger (pyramidal) motor strategy, and may not be equivalent to the "giant hand" illusion that is believed to reflect the predominance of the vestibulospinal (extrapyramidal) motor pathways during extreme spatial disorientation. These and other findings indicate that various visual orientation effects may involve at least partially independent mechanisms.
F H Previc
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Review    
Journal Detail:
Title:  Journal of vestibular research : equilibrium & orientation     Volume:  2     ISSN:  0957-4271     ISO Abbreviation:  J Vestib Res     Publication Date:  1992  
Date Detail:
Created Date:  1994-02-07     Completed Date:  1994-02-07     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9104163     Medline TA:  J Vestib Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  285-95     Citation Subset:  IM; S    
Crew Technology Division, Armstrong Laboratory, Brooks Air Force Base, Texas 78235-5104.
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MeSH Terms
Motion Perception / physiology
Motor Activity / physiology
Psychomotor Performance / physiology*
Vestibule, Labyrinth / physiology
Visual Perception / physiology*

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