Thigh musculature stiffness during active muscle contraction after anterior cruciate ligament injury

April L. McPherson; Nathaniel A. Bates; Clifton R. Haider; Takashi Nagai; Timothy E. Hewett; Nathan D. Schilaty

doi:10.1186/s12891-020-03342-x

Thigh musculature stiffness during active muscle contraction after anterior cruciate ligament injury

April L. McPherson, Nathaniel A. Bates, Clifton R. Haider, Takashi Nagai, Timothy E. Hewett, Nathan D. Schilaty

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

1 Scopus citations

Abstract

Background: Altered motor unit (MU) activity has been identified after anterior cruciate ligament (ACL) injury, but its effect on muscle tissue properties is unknown. The purpose of this study was to compare thigh musculature muscle stiffness between control and ACL-injured subjects. Methods: Thirty ACL-injured subjects and 25 control subjects were recruited. Subjects completed a randomized protocol of isometric contractions while electromyography (EMG) signals were recorded. Three maximum voluntary isometric contractions (MVIC) determined peak force for 10 and 25% MVIC trials. Shear wave elastography was captured during each 10 and 25% MVIC trials. Results: Differences in muscle stiffness were assessed between limbs and groups. 12 months post-surgery had higher stiffness for VM 0% MVIC, VL 0 and 10% MVIC, and ST 10 and 25% MVIC (all p ≤ 0.04). Conclusion: Thigh musculature stiffness changed throughout rehabilitation and remained altered at 12 months after ACL reconstruction.

Original language	English (US)
Article number	320
Journal	BMC Musculoskeletal Disorders
Volume	21
Issue number	1
DOIs	https://doi.org/10.1186/s12891-020-03342-x
State	Published - May 21 2020

Keywords

ACL reconstruction
Arthrogenic muscle inhibition
EMG decomposition
Rehabilitation
Shear wave elastography

ASJC Scopus subject areas

Rheumatology
Orthopedics and Sports Medicine

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title = "Thigh musculature stiffness during active muscle contraction after anterior cruciate ligament injury",

abstract = "Background: Altered motor unit (MU) activity has been identified after anterior cruciate ligament (ACL) injury, but its effect on muscle tissue properties is unknown. The purpose of this study was to compare thigh musculature muscle stiffness between control and ACL-injured subjects. Methods: Thirty ACL-injured subjects and 25 control subjects were recruited. Subjects completed a randomized protocol of isometric contractions while electromyography (EMG) signals were recorded. Three maximum voluntary isometric contractions (MVIC) determined peak force for 10 and 25% MVIC trials. Shear wave elastography was captured during each 10 and 25% MVIC trials. Results: Differences in muscle stiffness were assessed between limbs and groups. 12 months post-surgery had higher stiffness for VM 0% MVIC, VL 0 and 10% MVIC, and ST 10 and 25% MVIC (all p ≤ 0.04). Conclusion: Thigh musculature stiffness changed throughout rehabilitation and remained altered at 12 months after ACL reconstruction.",

keywords = "ACL reconstruction, Arthrogenic muscle inhibition, EMG decomposition, Rehabilitation, Shear wave elastography",

author = "McPherson, {April L.} and Bates, {Nathaniel A.} and Haider, {Clifton R.} and Takashi Nagai and Hewett, {Timothy E.} and Schilaty, {Nathan D.}",

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doi = "10.1186/s12891-020-03342-x",

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AU - McPherson, April L.

AU - Bates, Nathaniel A.

AU - Haider, Clifton R.

AU - Nagai, Takashi

AU - Hewett, Timothy E.

AU - Schilaty, Nathan D.

PY - 2020/5/21

Y1 - 2020/5/21

N2 - Background: Altered motor unit (MU) activity has been identified after anterior cruciate ligament (ACL) injury, but its effect on muscle tissue properties is unknown. The purpose of this study was to compare thigh musculature muscle stiffness between control and ACL-injured subjects. Methods: Thirty ACL-injured subjects and 25 control subjects were recruited. Subjects completed a randomized protocol of isometric contractions while electromyography (EMG) signals were recorded. Three maximum voluntary isometric contractions (MVIC) determined peak force for 10 and 25% MVIC trials. Shear wave elastography was captured during each 10 and 25% MVIC trials. Results: Differences in muscle stiffness were assessed between limbs and groups. 12 months post-surgery had higher stiffness for VM 0% MVIC, VL 0 and 10% MVIC, and ST 10 and 25% MVIC (all p ≤ 0.04). Conclusion: Thigh musculature stiffness changed throughout rehabilitation and remained altered at 12 months after ACL reconstruction.

AB - Background: Altered motor unit (MU) activity has been identified after anterior cruciate ligament (ACL) injury, but its effect on muscle tissue properties is unknown. The purpose of this study was to compare thigh musculature muscle stiffness between control and ACL-injured subjects. Methods: Thirty ACL-injured subjects and 25 control subjects were recruited. Subjects completed a randomized protocol of isometric contractions while electromyography (EMG) signals were recorded. Three maximum voluntary isometric contractions (MVIC) determined peak force for 10 and 25% MVIC trials. Shear wave elastography was captured during each 10 and 25% MVIC trials. Results: Differences in muscle stiffness were assessed between limbs and groups. 12 months post-surgery had higher stiffness for VM 0% MVIC, VL 0 and 10% MVIC, and ST 10 and 25% MVIC (all p ≤ 0.04). Conclusion: Thigh musculature stiffness changed throughout rehabilitation and remained altered at 12 months after ACL reconstruction.

KW - ACL reconstruction

KW - Arthrogenic muscle inhibition

KW - EMG decomposition

KW - Rehabilitation

KW - Shear wave elastography

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Thigh musculature stiffness during active muscle contraction after anterior cruciate ligament injury

Abstract

Keywords

ASJC Scopus subject areas

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