The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements.

The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements. Research Abstract Details 

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The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements. Abstract Text:

S R Jackson,G M Jackson,J Harrison,L Henderson,C Kennard,

This paper reports two experiments which examined the effects of Parkinson's disease (PD) upon the sensorimotor mechanisms used to control prehension movements. Transport and grasp kinematics for visually-guided and memory-guided prehension movements were examined in healthy control subjects and compared against those of patients with idiopathic PD. Two research questions were addressed: (1) Are patients with PD particularly susceptible to distraction by non-relevant objects? (2) Are patients with PD especially reliant on external feedback when executing goal-directed actions? The results indicated that the patient group were no more susceptible to distraction by non-relevant objects than the control group. In contrast, the patients with PD were shown to be significantly impaired when executing memory-guided reaches. Furthermore, the deficits exhibited by the PD group on memory-guided reaches were confined solely to those markers associated with the transport component of the prehension movement. That is, while both controls and patients with PD widened their grip aperture on memory-guided trials, the magnitude of this adjustment was comparable across the two groups. The implications of these findings for theories of visuomotor processing in sufferers of PD and the control of prehension movements more generally are discussed.

The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements. Publishing Authors By Initials

SR Jackson,GM Jackson,J Harrison,L Henderson,C Kennard,

For similar psychological phenomena and processes: mental processes: perception: visual perception research abstracts see: psychological phenomena and processes: mental processes: perception: visual perception research

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The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 105

Page Numbers: 147-62

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ISSN: 0014-4819

DAY: 15

MONTH: 02

YEAR: 1995

The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements. Information

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LANGUAGE: eng

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The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements. Keywords Mesh Terms:

KEYWORDS: Visual Perception

MESH TERMS: psychology

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Grant and Affiliation Information for The internal control of action and Parkinson's disease: a kinematic analysis of visually-guided and memory-guided prehension movements.

AFFILIATION: Clinical Neuroscience Unit, Charing Cross and Westminister Medical School, Charing Cross Hospital, London, UK.

Country: GERMANY

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MEDLINETA: Exp Brain Res

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