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Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear

This study aimed to compare the effect of the load of the upper limb on the stiffness of supraspinatus muscle regions during isometric shoulder abduction in the scapular plane in healthy individuals and patients with a rotator cuff tear. Thirteen male patients were scheduled for arthroscopic rotator...

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Autores principales: Sakaki, Yoshinari, Taniguchi, Keigo, Katayose, Masaki, Kura, Hideji, Okamura, Kenji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9298298/
https://www.ncbi.nlm.nih.gov/pubmed/34668243
http://dx.doi.org/10.1002/ca.23800
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author Sakaki, Yoshinari
Taniguchi, Keigo
Katayose, Masaki
Kura, Hideji
Okamura, Kenji
author_facet Sakaki, Yoshinari
Taniguchi, Keigo
Katayose, Masaki
Kura, Hideji
Okamura, Kenji
author_sort Sakaki, Yoshinari
collection PubMed
description This study aimed to compare the effect of the load of the upper limb on the stiffness of supraspinatus muscle regions during isometric shoulder abduction in the scapular plane in healthy individuals and patients with a rotator cuff tear. Thirteen male patients were scheduled for arthroscopic rotator cuff repair, and 13 healthy male individuals were recruited. The movement task involved 30° isometric shoulder abduction in the scapular plane. The tasks included passive abduction, abduction with half‐weight of the upper limb (1/2‐weight), and full weight of the upper limb (full‐weight). The stiffness of the supraspinatus muscle (anterior superficial, anterior deep, posterior superficial, and posterior deep regions) was recorded using ultrasound shear‐wave elastography. The stiffness of the anterior superficial region on the affected side was significantly lower than that on the control side for the 1/2‐weight and full‐weight tasks. The stiffness of the anterior deep, posterior superficial, and posterior deep regions was not affected. This is the first study that investigated the mechanical effects of different loads on different supraspinatus muscle regions in rotator cuff tear patients. Our results indicate that the anterior superficial region in rotator cuff tear patients was mainly responsible for reduced active stiffness. This might be because this region contributes to force exertion and exhibits atrophy in rotator cuff tears. Hence, the anterior superficial region could be a focal point of quantitative dysfunction evaluation of the supraspinatus muscle in the case of a rotator cuff tear.
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spelling pubmed-92982982022-07-21 Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear Sakaki, Yoshinari Taniguchi, Keigo Katayose, Masaki Kura, Hideji Okamura, Kenji Clin Anat Original Communications This study aimed to compare the effect of the load of the upper limb on the stiffness of supraspinatus muscle regions during isometric shoulder abduction in the scapular plane in healthy individuals and patients with a rotator cuff tear. Thirteen male patients were scheduled for arthroscopic rotator cuff repair, and 13 healthy male individuals were recruited. The movement task involved 30° isometric shoulder abduction in the scapular plane. The tasks included passive abduction, abduction with half‐weight of the upper limb (1/2‐weight), and full weight of the upper limb (full‐weight). The stiffness of the supraspinatus muscle (anterior superficial, anterior deep, posterior superficial, and posterior deep regions) was recorded using ultrasound shear‐wave elastography. The stiffness of the anterior superficial region on the affected side was significantly lower than that on the control side for the 1/2‐weight and full‐weight tasks. The stiffness of the anterior deep, posterior superficial, and posterior deep regions was not affected. This is the first study that investigated the mechanical effects of different loads on different supraspinatus muscle regions in rotator cuff tear patients. Our results indicate that the anterior superficial region in rotator cuff tear patients was mainly responsible for reduced active stiffness. This might be because this region contributes to force exertion and exhibits atrophy in rotator cuff tears. Hence, the anterior superficial region could be a focal point of quantitative dysfunction evaluation of the supraspinatus muscle in the case of a rotator cuff tear. John Wiley & Sons, Inc. 2021-10-26 2022-01 /pmc/articles/PMC9298298/ /pubmed/34668243 http://dx.doi.org/10.1002/ca.23800 Text en © 2021 The Authors. Clinical Anatomy published by Wiley Periodicals LLC on behalf of American Association of Clinical Anatomists. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Original Communications
Sakaki, Yoshinari
Taniguchi, Keigo
Katayose, Masaki
Kura, Hideji
Okamura, Kenji
Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear
title Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear
title_full Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear
title_fullStr Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear
title_full_unstemmed Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear
title_short Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear
title_sort effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear
topic Original Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9298298/
https://www.ncbi.nlm.nih.gov/pubmed/34668243
http://dx.doi.org/10.1002/ca.23800
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