Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes

Abstract This study investigated the characteristics of arm elevation via principal component analysis in symptomatic overhead athletes with scapular dyskinesis. One hundred-thirty-four overhead athletes with scapular dyskinesis [24: inferior angle prominence (pattern I); 46: medial border prominenc...

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Autores principales:	Tsun-Shun Huang, Jiu-Jenq Lin, Hsiang-Ling Ou, Yu-Ting Chen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/480ff7d24c8b483ba1d1ef83f8ebf432
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spelling	oai:doaj.org-article:480ff7d24c8b483ba1d1ef83f8ebf4322021-12-02T16:07:57ZMovement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes10.1038/s41598-017-06779-82045-2322https://doaj.org/article/480ff7d24c8b483ba1d1ef83f8ebf4322017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06779-8https://doaj.org/toc/2045-2322Abstract This study investigated the characteristics of arm elevation via principal component analysis in symptomatic overhead athletes with scapular dyskinesis. One hundred-thirty-four overhead athletes with scapular dyskinesis [24: inferior angle prominence (pattern I); 46: medial border prominence (pattern II), 64: pattern I + II] were evaluated by three-dimensional electromagnetic motion and electromyography to record the scapular kinematics (upward rotation/posterior tipping/exterior rotation) and muscle activation (upper trapezius: UT; middle trapezius: MT; lower trapezius: LT; serratus anterior: SA) during lowering phase of arm elevation. The results showed: (1) for pattern I and II, the first 3 principal component (PCs) explained 41.4% and 42.6% of total variance of movement; (2) the first PCs were correlated with MT, LT activity (r = 0.41~0.61) and upward rotation, posterior tipping (r = −0.59~−0.33) in pattern I, and UT, MT, SA (r = 0.30~0.70) activity in pattern II; (3) contour plots of muscle activity demonstrated that muscle activities varied with dyskinesis patterns. In summary, for the pattern I, the major characteristics are coactivation of MT and LT and corresponding scapular posterior tipping and upward rotation. For the pattern II, the major characteristics are coactivation of UT, MT and SA without corresponding scapular external rotation.Tsun-Shun HuangJiu-Jenq LinHsiang-Ling OuYu-Ting ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tsun-Shun Huang Jiu-Jenq Lin Hsiang-Ling Ou Yu-Ting Chen Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes
description	Abstract This study investigated the characteristics of arm elevation via principal component analysis in symptomatic overhead athletes with scapular dyskinesis. One hundred-thirty-four overhead athletes with scapular dyskinesis [24: inferior angle prominence (pattern I); 46: medial border prominence (pattern II), 64: pattern I + II] were evaluated by three-dimensional electromagnetic motion and electromyography to record the scapular kinematics (upward rotation/posterior tipping/exterior rotation) and muscle activation (upper trapezius: UT; middle trapezius: MT; lower trapezius: LT; serratus anterior: SA) during lowering phase of arm elevation. The results showed: (1) for pattern I and II, the first 3 principal component (PCs) explained 41.4% and 42.6% of total variance of movement; (2) the first PCs were correlated with MT, LT activity (r = 0.41~0.61) and upward rotation, posterior tipping (r = −0.59~−0.33) in pattern I, and UT, MT, SA (r = 0.30~0.70) activity in pattern II; (3) contour plots of muscle activity demonstrated that muscle activities varied with dyskinesis patterns. In summary, for the pattern I, the major characteristics are coactivation of MT and LT and corresponding scapular posterior tipping and upward rotation. For the pattern II, the major characteristics are coactivation of UT, MT and SA without corresponding scapular external rotation.
format	article
author	Tsun-Shun Huang Jiu-Jenq Lin Hsiang-Ling Ou Yu-Ting Chen
author_facet	Tsun-Shun Huang Jiu-Jenq Lin Hsiang-Ling Ou Yu-Ting Chen
author_sort	Tsun-Shun Huang
title	Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes
title_short	Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes
title_full	Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes
title_fullStr	Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes
title_full_unstemmed	Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes
title_sort	movement pattern of scapular dyskinesis in symptomatic overhead athletes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/480ff7d24c8b483ba1d1ef83f8ebf432
work_keys_str_mv	AT tsunshunhuang movementpatternofscapulardyskinesisinsymptomaticoverheadathletes AT jiujenqlin movementpatternofscapulardyskinesisinsymptomaticoverheadathletes AT hsianglingou movementpatternofscapulardyskinesisinsymptomaticoverheadathletes AT yutingchen movementpatternofscapulardyskinesisinsymptomaticoverheadathletes
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Movement Pattern of Scapular Dyskinesis in Symptomatic Overhead Athletes

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