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

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...

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Bibliographic Details
Published in:Canadian journal of neurological sciences 1978-11, Vol.5 (4), p.413-415
Main Authors: Cooke, J.D., Brown, J.D., Brooks, V.B.
Format: Article
Language:English
Subjects:
Aged
Cues
Humans
Male
Motor Skills - physiology
Parkinson Disease - physiopathology
Space life sciences
Visual Perception - physiology
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Summary: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.
ISSN:0317-1671
2057-0155
DOI:10.1017/S0317167100024197