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Increased Dependence on Visual Information for Movement Control in Patients with Parkinson's disease

Published online by Cambridge University Press:  18 September 2015

J.D. Cooke ,
J.D. Brown  and
V.B. Brooks
J.D. Cooke*
Affiliation:
Departments of Physiology and Clinical Neurological Sciences, University of Western Ontario, London, Canada
J.D. Brown
Affiliation:
Departments of Physiology and Clinical Neurological Sciences, University of Western Ontario, London, Canada
V.B. Brooks
Affiliation:
Departments of Physiology and Clinical Neurological Sciences, University of Western Ontario, London, Canada
*
Department of Physiology, The University of Western Ontario, London, Ontario, Canada, N6A 5C1.
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Studies were made of visually and nonrvisitally guided movements by patients with Parkinson's disease. The subjects moved a light, horizontal handle using rotation primarily about the elbow. During visually guided trials both handle and target positions were displayed to the subject; during non-visually guided trials only the handle position was displayed. During non-visually guided trials all patients showed a tendency for an overall flexion drift, although there was no change in average movement amplitude. The overall error in position by the end of the non-visually guided trials was greatly in excess of the reported values for passive displacement thresholds in normal subjects. It is suggested that the data indicate an increased dependence on visual information for control of motor activity in Parkinson's patients.

Type
Research Article
Information
Canadian Journal of Neurological Sciences , Volume 5 , Issue 4 , November 1978 , pp. 413 - 415
Copyright
Copyright © Canadian Neurological Sciences Federation 1978

References

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