Quantification of peripherally induced reciprocal activation during voluntary muscle contraction

Martha Flanders; Paul J. Cordo

doi:10.1016/0013-4694(87)90001-0

Quantification of peripherally induced reciprocal activation during voluntary muscle contraction

Martha Flanders, Paul J. Cordo

Neuroscience

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

A new method was developed to compare patterns of coactivation and reciprocal activation of antagonistic muscles during different experimental conditions. Pure coactivation was defined as a muscle activity pattern where there was never a difference between the slope of the agonist EMG record and the slope of the antagonist EMG record. The degree of reciprocal activation was defined as being proportional to the average absolute value of the difference between these two slope values. Use of this method for the comparison of muscle activity patterns during isometric contractions and unexpected movements showed that peripheral input related to agonist unloading and antagonist stretch significantly increased reciprocal activity.

Original language	English (US)
Pages (from-to)	389-394
Number of pages	6
Journal	Electroencephalography and clinical neurophysiology
Volume	67
Issue number	5
DOIs	https://doi.org/10.1016/0013-4694(87)90001-0
State	Published - Nov 1987

Bibliographical note

Funding Information:
I Supported by National Research Service Award NS07661. 2 Supported by USPHS Grant AN31017 and by a grant from The Medical Research Foundation of Oregon, Inc.

Keywords

Coactivation
Electromyography
Isometric contraction
Reciprocal activation
Triphasic pattern
Voluntary movement

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title = "Quantification of peripherally induced reciprocal activation during voluntary muscle contraction",

abstract = "A new method was developed to compare patterns of coactivation and reciprocal activation of antagonistic muscles during different experimental conditions. Pure coactivation was defined as a muscle activity pattern where there was never a difference between the slope of the agonist EMG record and the slope of the antagonist EMG record. The degree of reciprocal activation was defined as being proportional to the average absolute value of the difference between these two slope values. Use of this method for the comparison of muscle activity patterns during isometric contractions and unexpected movements showed that peripheral input related to agonist unloading and antagonist stretch significantly increased reciprocal activity.",

keywords = "Coactivation, Electromyography, Isometric contraction, Reciprocal activation, Triphasic pattern, Voluntary movement",

author = "Martha Flanders and Cordo, {Paul J.}",

note = "Funding Information: I Supported by National Research Service Award NS07661. 2 Supported by USPHS Grant AN31017 and by a grant from The Medical Research Foundation of Oregon, Inc.",

year = "1987",

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doi = "10.1016/0013-4694(87)90001-0",

language = "English (US)",

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pages = "389--394",

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T1 - Quantification of peripherally induced reciprocal activation during voluntary muscle contraction

AU - Flanders, Martha

AU - Cordo, Paul J.

N1 - Funding Information: I Supported by National Research Service Award NS07661. 2 Supported by USPHS Grant AN31017 and by a grant from The Medical Research Foundation of Oregon, Inc.

PY - 1987/11

Y1 - 1987/11

N2 - A new method was developed to compare patterns of coactivation and reciprocal activation of antagonistic muscles during different experimental conditions. Pure coactivation was defined as a muscle activity pattern where there was never a difference between the slope of the agonist EMG record and the slope of the antagonist EMG record. The degree of reciprocal activation was defined as being proportional to the average absolute value of the difference between these two slope values. Use of this method for the comparison of muscle activity patterns during isometric contractions and unexpected movements showed that peripheral input related to agonist unloading and antagonist stretch significantly increased reciprocal activity.

AB - A new method was developed to compare patterns of coactivation and reciprocal activation of antagonistic muscles during different experimental conditions. Pure coactivation was defined as a muscle activity pattern where there was never a difference between the slope of the agonist EMG record and the slope of the antagonist EMG record. The degree of reciprocal activation was defined as being proportional to the average absolute value of the difference between these two slope values. Use of this method for the comparison of muscle activity patterns during isometric contractions and unexpected movements showed that peripheral input related to agonist unloading and antagonist stretch significantly increased reciprocal activity.

KW - Coactivation

KW - Electromyography

KW - Isometric contraction

KW - Reciprocal activation

KW - Triphasic pattern

KW - Voluntary movement

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JO - Electroencephalography and Clinical Neurophysiology

JF - Electroencephalography and Clinical Neurophysiology

SN - 0013-4694

IS - 5

ER -

Quantification of peripherally induced reciprocal activation during voluntary muscle contraction

Abstract

Bibliographical note

Keywords

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