Force production characteristics in Parkinson's disease

Stelmach, George E., Teasdale, Normand, Phillips, James, & Worringham, Charles J. (1989) Force production characteristics in Parkinson's disease. Experimental Brain Research, 76(1), pp. 165-172.

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This experiment examined the preparation and the production of isometric force in Parkinson's disease (PD). PD patients, elderly, and young subjects generated force levels that were a percentage of their maximum (15, 30, 45, and 60%). Subjects were cued on the upcoming target force level and they were asked to produce the required response as fast as possible. PD patients showed a similar progression of force variability and dispersion of peak forces to that of control subjects, implying they have an accurate "internal model" of the required forces. Force production impairments were seen, however, at the within?trial level. PD patients had more irregular force?time curves that were characterized by changes in the rate of force production. The results suggest a more "noisy" output from the motor system and an inability to produce smooth forces. PD patients were also substantially slower in initiating a force production and the delay was localized in the pre?motor reaction time.

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ID Code: 2445
Item Type: Journal Article
Refereed: Yes
Keywords: Reaction time, force, isometric, movement time, pre, motor, aiming
DOI: 10.1007/BF00253633
ISSN: 1432-1106
Subjects: Australian and New Zealand Standard Research Classification > PSYCHOLOGY AND COGNITIVE SCIENCES (170000) > PSYCHOLOGY (170100) > Sensory Processes Perception and Performance (170112)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1989 Springer
Copyright Statement: The original publication is available at SpringerLink
Deposited On: 08 Nov 2005 00:00
Last Modified: 01 Sep 2010 12:38

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