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Wrist tendon moment arms: Quantification by imaging and experimental techniques

Subject-specific musculoskeletal models require accurate values of muscle moment arms. The aim of this study was to compare moment arms of wrist tendons obtained from non-invasive magnetic resonance imaging (MRI) to those obtained from an in vitro experimental approach. MRI was performed on ten uppe...

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Autores principales: Garland, Angela K., Shah, Darshan S., Kedgley, Angela E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5793998/
https://www.ncbi.nlm.nih.gov/pubmed/29306550
http://dx.doi.org/10.1016/j.jbiomech.2017.12.024
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author Garland, Angela K.
Shah, Darshan S.
Kedgley, Angela E.
author_facet Garland, Angela K.
Shah, Darshan S.
Kedgley, Angela E.
author_sort Garland, Angela K.
collection PubMed
description Subject-specific musculoskeletal models require accurate values of muscle moment arms. The aim of this study was to compare moment arms of wrist tendons obtained from non-invasive magnetic resonance imaging (MRI) to those obtained from an in vitro experimental approach. MRI was performed on ten upper limb cadaveric specimens to obtain the centrelines for the flexor carpi radialis (FCR), flexor carpi ulnaris (FCU), extensor carpi radialis longus (ECRL), extensor carpi radialis brevis (ECRB), extensor carpi ulnaris (ECU), and abductor pollicis longus (APL) tendons. From these, the anatomical moment arms about each of the flexion-extension (FE) and radioulnar deviation (RUD) axes of the wrist were calculated. Specimens were mounted on a physiologic wrist simulator to obtain functional measurements of the moment arms using the tendon excursion method. No differences were observed between anatomical and functional values of the FE and RUD moment arms of FCR, ECRL and ECRB, and the RUD moment arm of ECU (p > .075). Scaling the anatomical moment arms relative to ECRB in FE and ECU in RUD reduced differences in the FE moment arm of FCU and the RUD moment arm of APL to less than 15% (p > .139). However, differences persisted in moment arms of FCU in RUD, and ECU and APL in FE (p < .008). This study shows that while measurements of moment arms of wrist tendons using imaging do not always conform to values obtained using in vitro experimental approaches, a stricter protocol could result in the acquisition of subject-specific moment arms to personalise musculoskeletal models.
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spelling pubmed-57939982018-02-08 Wrist tendon moment arms: Quantification by imaging and experimental techniques Garland, Angela K. Shah, Darshan S. Kedgley, Angela E. J Biomech Article Subject-specific musculoskeletal models require accurate values of muscle moment arms. The aim of this study was to compare moment arms of wrist tendons obtained from non-invasive magnetic resonance imaging (MRI) to those obtained from an in vitro experimental approach. MRI was performed on ten upper limb cadaveric specimens to obtain the centrelines for the flexor carpi radialis (FCR), flexor carpi ulnaris (FCU), extensor carpi radialis longus (ECRL), extensor carpi radialis brevis (ECRB), extensor carpi ulnaris (ECU), and abductor pollicis longus (APL) tendons. From these, the anatomical moment arms about each of the flexion-extension (FE) and radioulnar deviation (RUD) axes of the wrist were calculated. Specimens were mounted on a physiologic wrist simulator to obtain functional measurements of the moment arms using the tendon excursion method. No differences were observed between anatomical and functional values of the FE and RUD moment arms of FCR, ECRL and ECRB, and the RUD moment arm of ECU (p > .075). Scaling the anatomical moment arms relative to ECRB in FE and ECU in RUD reduced differences in the FE moment arm of FCU and the RUD moment arm of APL to less than 15% (p > .139). However, differences persisted in moment arms of FCU in RUD, and ECU and APL in FE (p < .008). This study shows that while measurements of moment arms of wrist tendons using imaging do not always conform to values obtained using in vitro experimental approaches, a stricter protocol could result in the acquisition of subject-specific moment arms to personalise musculoskeletal models. Elsevier Science 2018-02-08 /pmc/articles/PMC5793998/ /pubmed/29306550 http://dx.doi.org/10.1016/j.jbiomech.2017.12.024 Text en © 2018 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Garland, Angela K.
Shah, Darshan S.
Kedgley, Angela E.
Wrist tendon moment arms: Quantification by imaging and experimental techniques
title Wrist tendon moment arms: Quantification by imaging and experimental techniques
title_full Wrist tendon moment arms: Quantification by imaging and experimental techniques
title_fullStr Wrist tendon moment arms: Quantification by imaging and experimental techniques
title_full_unstemmed Wrist tendon moment arms: Quantification by imaging and experimental techniques
title_short Wrist tendon moment arms: Quantification by imaging and experimental techniques
title_sort wrist tendon moment arms: quantification by imaging and experimental techniques
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5793998/
https://www.ncbi.nlm.nih.gov/pubmed/29306550
http://dx.doi.org/10.1016/j.jbiomech.2017.12.024
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