Document Detail

Asymmetries in the discrete and pseudocontinuous regulation of visually guided reaching.
MedLine Citation:
PMID:  1575975     Owner:  NLM     Status:  MEDLINE    
An experiment was conducted to examine the contribution of the hemispheres to the organization of aiming movements. The spatial positions of targets were obtained by extrapolating from brief visual displays of geometric patterns. The patterns comprised linear, quadratic, cubic, and quartic mathematical functions and varied in spatial complexity. Vision of the hand was also manipulated. While the hands did not differ in spatial accuracy, movements made by the right hand were of shorter duration and had higher peak velocities. The stimulus pattern strongly influenced kinematics, in particular the number of discrete modifications of the movement trajectory. Vision of the hand resulted in superior accuracy, although subjects were unable to compare the relative positions of the limb and the target. Vision of the hand did not lead to an increase in discrete adjustments, suggesting that visual information was used in a continuous fashion. Movements into ipsilateral space differed from those into contralateral space with respect to a number of parameters.
R G Carson; D Goodman; D Elliott
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Brain and cognition     Volume:  18     ISSN:  0278-2626     ISO Abbreviation:  Brain Cogn     Publication Date:  1992 Mar 
Date Detail:
Created Date:  1992-06-11     Completed Date:  1992-06-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8218014     Medline TA:  Brain Cogn     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  169-91     Citation Subset:  IM    
School of Kinesiology, Simon Fraser University, Burnaby, BC, Canada.
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MeSH Terms
Dominance, Cerebral*
Motion Perception
Pattern Recognition, Visual
Psychomotor Performance*
Space Perception

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

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