Effects of practice on myoelectric and kinematic correlates of human movement

Slobodan Jaric; Daniel M. Corcos; Gerald L. Gottlieb; Gyan C. Agarwal

doi:10.1016/0021-9290(89)90298-4

Effects of practice on myoelectric and kinematic correlates of human movement

Slobodan Jaric^*, Daniel M. Corcos, Gerald L. Gottlieb, Gyan C. Agarwal

^*Corresponding author for this work

Physical Therapy and Human Movement Sciences

Research output: Contribution to journal › Conference article › peer-review

Abstract

Eight subjects performed 1400 fast, accurate elbow flexion movements in blocks of two hundred trials over a two week period. Kinematic and electromyographic (EMG) changes were most noticeable over the first 600 to 1000 trials. Peak acceleration, peak deceleration and peak velocity all increased. The increase in peak deceleration was much more pronounced than the increase in peak acceleration and the movements became more oscillatory. There was also a substantial decrease in the variability of peak movement velocity. Analysis of the EMGs from agonist and antagonist muscles suggests that the increased performance (as reflected in the kinematic parameters) is associated with the following changes in EMG parameters. The slope of the rising phase of the agonist and antagonist EMGs increased and the second agonist burst became larger and more consistent.

Original language	English (US)
Number of pages	1
Journal	Journal of Biomechanics
Volume	22
Issue number	10
DOIs	https://doi.org/10.1016/0021-9290(89)90298-4
State	Published - Jan 1 1989
Event	Abstracts of the XII Congress, International Society of Biomechanics - Los Angeles, CA, USA Duration: Jun 26 1989 → Jun 30 1989

ASJC Scopus subject areas

Biophysics
Orthopedics and Sports Medicine
Biomedical Engineering
Rehabilitation

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10.1016/0021-9290(89)90298-4

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title = "Effects of practice on myoelectric and kinematic correlates of human movement",

abstract = "Eight subjects performed 1400 fast, accurate elbow flexion movements in blocks of two hundred trials over a two week period. Kinematic and electromyographic (EMG) changes were most noticeable over the first 600 to 1000 trials. Peak acceleration, peak deceleration and peak velocity all increased. The increase in peak deceleration was much more pronounced than the increase in peak acceleration and the movements became more oscillatory. There was also a substantial decrease in the variability of peak movement velocity. Analysis of the EMGs from agonist and antagonist muscles suggests that the increased performance (as reflected in the kinematic parameters) is associated with the following changes in EMG parameters. The slope of the rising phase of the agonist and antagonist EMGs increased and the second agonist burst became larger and more consistent.",

author = "Slobodan Jaric and Corcos, {Daniel M.} and Gottlieb, {Gerald L.} and Agarwal, {Gyan C.}",

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TY - JOUR

T1 - Effects of practice on myoelectric and kinematic correlates of human movement

AU - Jaric, Slobodan

AU - Corcos, Daniel M.

AU - Gottlieb, Gerald L.

AU - Agarwal, Gyan C.

PY - 1989/1/1

Y1 - 1989/1/1

N2 - Eight subjects performed 1400 fast, accurate elbow flexion movements in blocks of two hundred trials over a two week period. Kinematic and electromyographic (EMG) changes were most noticeable over the first 600 to 1000 trials. Peak acceleration, peak deceleration and peak velocity all increased. The increase in peak deceleration was much more pronounced than the increase in peak acceleration and the movements became more oscillatory. There was also a substantial decrease in the variability of peak movement velocity. Analysis of the EMGs from agonist and antagonist muscles suggests that the increased performance (as reflected in the kinematic parameters) is associated with the following changes in EMG parameters. The slope of the rising phase of the agonist and antagonist EMGs increased and the second agonist burst became larger and more consistent.

AB - Eight subjects performed 1400 fast, accurate elbow flexion movements in blocks of two hundred trials over a two week period. Kinematic and electromyographic (EMG) changes were most noticeable over the first 600 to 1000 trials. Peak acceleration, peak deceleration and peak velocity all increased. The increase in peak deceleration was much more pronounced than the increase in peak acceleration and the movements became more oscillatory. There was also a substantial decrease in the variability of peak movement velocity. Analysis of the EMGs from agonist and antagonist muscles suggests that the increased performance (as reflected in the kinematic parameters) is associated with the following changes in EMG parameters. The slope of the rising phase of the agonist and antagonist EMGs increased and the second agonist burst became larger and more consistent.

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DO - 10.1016/0021-9290(89)90298-4

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T2 - Abstracts of the XII Congress, International Society of Biomechanics

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ER -

Effects of practice on myoelectric and kinematic correlates of human movement

Abstract

ASJC Scopus subject areas

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