Document Detail


Congenitally blind individuals rapidly adapt to coriolis force perturbations of their reaching movements.
MedLine Citation:
PMID:  11024106     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Reaching movements made to visual targets in a rotating room are initially deviated in path and endpoint in the direction of transient Coriolis forces generated by the motion of the arm relative to the rotating environment. With additional reaches, movements become progressively straighter and more accurate. Such adaptation can occur even in the absence of visual feedback about movement progression or terminus. Here we examined whether congenitally blind and sighted subjects without visual feedback would demonstrate adaptation to Coriolis forces when they pointed to a haptically specified target location. Subjects were tested pre-, per-, and postrotation at 10 rpm counterclockwise. Reaching to straight ahead targets prerotation, both groups exhibited slightly curved paths. Per-rotation, both groups showed large initial deviations of movement path and curvature but within 12 reaches on average had returned to prerotation curvature levels and endpoints. Postrotation, both groups showed mirror image patterns of curvature and endpoint to the per-rotation pattern. The groups did not differ significantly on any of the performance measures. These results provide compelling evidence that motor adaptation to Coriolis perturbations can be achieved on the basis of proprioceptive, somatosensory, and motor information in the complete absence of visual experience.
Authors:
P DiZio; J R Lackner
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of neurophysiology     Volume:  84     ISSN:  0022-3077     ISO Abbreviation:  J. Neurophysiol.     Publication Date:  2000 Oct 
Date Detail:
Created Date:  2000-10-30     Completed Date:  2000-11-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375404     Medline TA:  J Neurophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2175-80     Citation Subset:  IM; S    
Affiliation:
Ashton Graybiel Spatial Orientation Laboratory and Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454-9110, USA.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological*
Adult
Arm / physiopathology*
Blindness / congenital*,  physiopathology*
Coriolis Force*
Female
Humans
Male
Psychomotor Performance*
Reference Values
Rotation
Investigator
Investigator/Affiliation:
J R Lackner / Brandeis U, Waltham, MA

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


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