Abstract
The response to perturbation of the manipulation component during prehension was assessed for both hands of a hemiParkinson and of a Control subject. With perturbed trials, the hemiParkinson showed the same pattern as the Control: a reorganization of kinematic parameters and no increase of movement time. However, for both limbs of the hemiParkinson subject there was a transition phase from precision grip to whole hand prehension--this was more pronounced for the affected limb. The manipulation component did not show a delay of activation [2]. Thus the global dysfunction in the performance of sequential movement patterns was related to aspects of task predictability.
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Aged
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Antiparkinson Agents / adverse effects
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Antiparkinson Agents / therapeutic use
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Attention / drug effects
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Attention / physiology
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Dominance, Cerebral / drug effects
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Dominance, Cerebral / physiology*
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Functional Laterality / drug effects
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Functional Laterality / physiology
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Humans
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Male
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Muscle Contraction / drug effects
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Muscle Contraction / physiology*
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Orientation / drug effects
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Orientation / physiology
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Parkinson Disease / drug therapy
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Parkinson Disease / physiopathology*
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Psychomotor Performance / drug effects
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Psychomotor Performance / physiology*
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Reaction Time / drug effects
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Reaction Time / physiology
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Signal Processing, Computer-Assisted