The relationship between volitional activation and muscle properties in incomplete spinal cord injury

Kristen L. Jakubowski; Andrew C. Smith; James M. Elliott; Sabrina S.M. Lee

doi:10.1310/sci17-00007

The relationship between volitional activation and muscle properties in incomplete spinal cord injury

Kristen L. Jakubowski^*, Andrew C. Smith, James M. Elliott, Sabrina S.M. Lee

^*Corresponding author for this work

Physical Therapy and Human Movement Sciences

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

2 Scopus citations

Abstract

Purpose: Following a motor incomplete spinal cord injury (iSCI), there is decreased volitional activation and changes in composition, architecture, and stiffness of affected muscles. We investigated the relationship between muscle properties and volitional activation. Methods: The relationship between central activation ratio (CAR), maximum volitional torque (MVT), and muscle properties was assessed in the gastrocnemius of 6 participants with iSCI. Results: No significant relationship was found between CAR and muscle properties, while a significant relationship was found between CAR and MVT. Conclusion: Our findings suggest there may be no relationship between volitional activation and muscle; thus, certain patients with iSCI may benefit from therapies targeted at neural control.

Original language	English (US)
Pages (from-to)	1-5
Number of pages	5
Journal	Topics in spinal cord injury rehabilitation
Volume	24
Issue number	1
DOIs	https://doi.org/10.1310/sci17-00007
State	Published - 2018

Keywords

Central activation ratio
Incomplete spinal cord injury
Maximum
Passive stiffness
Shear wave elastography
Volitional torque

ASJC Scopus subject areas

Medicine(all)

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10.1310/sci17-00007

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title = "The relationship between volitional activation and muscle properties in incomplete spinal cord injury",

abstract = "Purpose: Following a motor incomplete spinal cord injury (iSCI), there is decreased volitional activation and changes in composition, architecture, and stiffness of affected muscles. We investigated the relationship between muscle properties and volitional activation. Methods: The relationship between central activation ratio (CAR), maximum volitional torque (MVT), and muscle properties was assessed in the gastrocnemius of 6 participants with iSCI. Results: No significant relationship was found between CAR and muscle properties, while a significant relationship was found between CAR and MVT. Conclusion: Our findings suggest there may be no relationship between volitional activation and muscle; thus, certain patients with iSCI may benefit from therapies targeted at neural control.",

keywords = "Central activation ratio, Incomplete spinal cord injury, Maximum, Passive stiffness, Shear wave elastography, Volitional torque",

author = "Jakubowski, {Kristen L.} and Smith, {Andrew C.} and Elliott, {James M.} and Lee, {Sabrina S.M.}",

note = "Funding Information: The funding source, the NIH National Institute of Child Health and Human Development (grant nos. T32 HD057845, 5R01HD079076-03, K12HD073945), was not involved in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the article for publication. Publisher Copyright: {\textcopyright} 2017 Thomas Land Publishers, Inc.",

year = "2018",

doi = "10.1310/sci17-00007",

language = "English (US)",

volume = "24",

pages = "1--5",

journal = "Topics in Spinal Cord Injury Rehabilitation",

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T1 - The relationship between volitional activation and muscle properties in incomplete spinal cord injury

AU - Jakubowski, Kristen L.

AU - Smith, Andrew C.

AU - Elliott, James M.

AU - Lee, Sabrina S.M.

N1 - Funding Information: The funding source, the NIH National Institute of Child Health and Human Development (grant nos. T32 HD057845, 5R01HD079076-03, K12HD073945), was not involved in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the article for publication. Publisher Copyright: © 2017 Thomas Land Publishers, Inc.

PY - 2018

Y1 - 2018

N2 - Purpose: Following a motor incomplete spinal cord injury (iSCI), there is decreased volitional activation and changes in composition, architecture, and stiffness of affected muscles. We investigated the relationship between muscle properties and volitional activation. Methods: The relationship between central activation ratio (CAR), maximum volitional torque (MVT), and muscle properties was assessed in the gastrocnemius of 6 participants with iSCI. Results: No significant relationship was found between CAR and muscle properties, while a significant relationship was found between CAR and MVT. Conclusion: Our findings suggest there may be no relationship between volitional activation and muscle; thus, certain patients with iSCI may benefit from therapies targeted at neural control.

AB - Purpose: Following a motor incomplete spinal cord injury (iSCI), there is decreased volitional activation and changes in composition, architecture, and stiffness of affected muscles. We investigated the relationship between muscle properties and volitional activation. Methods: The relationship between central activation ratio (CAR), maximum volitional torque (MVT), and muscle properties was assessed in the gastrocnemius of 6 participants with iSCI. Results: No significant relationship was found between CAR and muscle properties, while a significant relationship was found between CAR and MVT. Conclusion: Our findings suggest there may be no relationship between volitional activation and muscle; thus, certain patients with iSCI may benefit from therapies targeted at neural control.

KW - Central activation ratio

KW - Incomplete spinal cord injury

KW - Maximum

KW - Passive stiffness

KW - Shear wave elastography

KW - Volitional torque

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The relationship between volitional activation and muscle properties in incomplete spinal cord injury

Abstract

Keywords

ASJC Scopus subject areas

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