Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics.

Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics. Research Abstract Details 

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Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics. Abstract Text:

J F Kalaska,D A Cohen,M Prud'homme,M L Hyde,

A previous study reported that proximal-arm related area 5 neurons showed continuously-graded changes in activity during unloaded arm movements in different directions (Kalaska et al. 1983), which resembled the responses of primary motor cortex cells in several respects (Georgopoulos et al. 1982). We report here that loading the arm reveals an important difference between cell activity in the two areas. Loads were continuously applied to the arm in different directions. The loads produced large continuously-graded changes in muscle activity but did not alter the handpath or joint angle changes of the arm during the movements. The activity of most area 5 cells was only weakly affected by the loads, and the overall pattern of population activity was virtually unaltered under all load conditions. This indicates that area 5 activity encodes the invariant spatial parameters (kinematics) of the movements. In contrast, many motor cortex cells showed large changes in activity during loading, and so signal the changing forces, torques or muscle activity (movement dynamics; Kalaska et al. 1989).

Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics. Publishing Authors By Initials

JF Kalaska,DA Cohen,M Prud'homme,ML Hyde,

For similar psychological phenomena and processes: psychomotor performance research abstracts see: psychological phenomena and processes: psychomotor performance research

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Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics. Journal Published:

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

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 80

Page Numbers: 351-64

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ISSN: 0014-4819

DAY: 15

MONTH: 02

YEAR: 1990

Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics. Information

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LANGUAGE: eng

NlmUniqueID: 43312

Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics. Keywords Mesh Terms:

KEYWORDS: Psychomotor Performance

MESH TERMS: physiology

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Grant and Affiliation Information for Parietal area 5 neuronal activity encodes movement kinematics, not movement dynamics.

AFFILIATION: Départment de Physiologie, Faculté de Médecine, Université de Montréal, Québec, Canada.

Country: GERMANY, WEST

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MEDLINETA: Exp Brain Res

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