Document Detail


Updating target location at the end of an orienting saccade affects the characteristics of simple point-to-point movements.
MedLine Citation:
PMID:  16366805     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Six results are reported. (a) Reaching accuracy increases when visual capture of the target is allowed (e.g., target on vs. target off at saccade onset). (b) Whatever the visual condition, trajectories diverge only after peak acceleration, suggesting that accuracy is improved through feedback mechanisms. (c) Feedback corrections are smoothly implemented, causing the corrected and uncorrected velocity profiles to exhibit similar shapes. (d) Initial kinematics poorly predict final accuracy whatever the condition, indicating that target capture is not the only critical input for feedback control. (e) Hand and eye final variability are unrelated, suggesting that gaze direction is not a target signal for arm control. (f) Extent errors are corrected without modification of movement straightness; direction errors cause path curvature to increase. Together these data show that movements with straight paths and bell-shaped velocity profiles are not necessarily ballistic.
Authors:
Michel Desmurget; Robert S Turner; Claude Prablanc; Gary S Russo; Garret E Alexander; Scott T Grafton
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of experimental psychology. Human perception and performance     Volume:  31     ISSN:  0096-1523     ISO Abbreviation:  J Exp Psychol Hum Percept Perform     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-21     Completed Date:  2006-03-30     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7502589     Medline TA:  J Exp Psychol Hum Percept Perform     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1510-36     Citation Subset:  IM    
Copyright Information:
(c) 2005 APA, all rights reserved.
Affiliation:
Institut National de la Santé et de la Recherche Médicale (INSERM), Bron, France. desmurget@lyon.inserm.fr
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MeSH Terms
Descriptor/Qualifier:
Adult
Feedback
Female
Hand
Humans
Male
Middle Aged
Movement*
Psychomotor Performance
Saccades*
Visual Perception*
Grant Support
ID/Acronym/Agency:
NS37470/NS/NINDS NIH HHS; NS38399/NS/NINDS NIH HHS; NS40442/NS/NINDS NIH HHS

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


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