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The function of the clavicle on scapular motion: a cadaveric study
Hypothesis The clavicle serves as a strut between the thorax and scapula, and lack of this function could affect shoulder mobility. We hypothesized that clavicular discontinuity changes shoulder kinematics, particularly affecting scapular motion. Materials and methods The study used 14 cadaveric sho...
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Published in: | Journal of shoulder and elbow surgery 2013-03, Vol.22 (3), p.333-339 |
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creator | Matsumura, Noboru, MD, PhD Nakamichi, Noriaki, MD Ikegami, Hiroyasu, MD, PhD Nagura, Takeo, MD, PhD Imanishi, Nobuaki, MD, PhD Aiso, Sadakazu, MD, PhD Toyama, Yoshiaki, MD, PhD |
description | Hypothesis The clavicle serves as a strut between the thorax and scapula, and lack of this function could affect shoulder mobility. We hypothesized that clavicular discontinuity changes shoulder kinematics, particularly affecting scapular motion. Materials and methods The study used 14 cadaveric shoulders. Cadavers were stabilized in the sitting position. Manual elevation in the sagittal, scapular, and coronal planes was performed in the intact and clavicular discontinuity models. The thorax-scapula distance and 3-dimensional scapular motion during shoulder elevation were recorded using an electromagnetic tracking device. The differences between the 2 experimental models at each position were analyzed. Results Clavicular discontinuity resulted in a decreased thorax-scapula distance and in reduced external rotation, upward rotation, and posterior tilting of the scapula. The kinematic changes were observed during elevations in all 3 planes but were greatest in the sagittal plane compared with the scapular and coronal planes. Conclusions The findings of this study revealed that discontinuity of the clavicle affects shoulder kinematics. Because of its anatomic shape and position, the clavicle stabilizes the external, upward, and posterior rotation of the scapula during arm movement. This function of the clavicle may assist glenohumeral joint motion and help prevent subacromial impingement. |
doi_str_mv | 10.1016/j.jse.2012.02.006 |
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We hypothesized that clavicular discontinuity changes shoulder kinematics, particularly affecting scapular motion. Materials and methods The study used 14 cadaveric shoulders. Cadavers were stabilized in the sitting position. Manual elevation in the sagittal, scapular, and coronal planes was performed in the intact and clavicular discontinuity models. The thorax-scapula distance and 3-dimensional scapular motion during shoulder elevation were recorded using an electromagnetic tracking device. The differences between the 2 experimental models at each position were analyzed. Results Clavicular discontinuity resulted in a decreased thorax-scapula distance and in reduced external rotation, upward rotation, and posterior tilting of the scapula. The kinematic changes were observed during elevations in all 3 planes but were greatest in the sagittal plane compared with the scapular and coronal planes. Conclusions The findings of this study revealed that discontinuity of the clavicle affects shoulder kinematics. Because of its anatomic shape and position, the clavicle stabilizes the external, upward, and posterior rotation of the scapula during arm movement. This function of the clavicle may assist glenohumeral joint motion and help prevent subacromial impingement.</description><identifier>ISSN: 1058-2746</identifier><identifier>EISSN: 1532-6500</identifier><identifier>DOI: 10.1016/j.jse.2012.02.006</identifier><identifier>PMID: 22608930</identifier><language>eng</language><publisher>United States</publisher><subject>Aged ; Aged, 80 and over ; Biomechanical Phenomena ; Cadaver ; Clavicle - physiology ; Female ; Humans ; Humerus - physiology ; Male ; Motion ; Orthopedics ; Rotation ; Scapula - physiology ; Thorax - physiology</subject><ispartof>Journal of shoulder and elbow surgery, 2013-03, Vol.22 (3), p.333-339</ispartof><rights>Journal of Shoulder and Elbow Surgery Board of Trustees</rights><rights>Copyright © 2013 Journal of Shoulder and Elbow Surgery Board of Trustees. Published by Mosby, Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c356t-338999901c3337cf3ef3e6bd5457ceb0d74ffd49e12b4d7eeafd22a983cb1ed53</citedby><cites>FETCH-LOGICAL-c356t-338999901c3337cf3ef3e6bd5457ceb0d74ffd49e12b4d7eeafd22a983cb1ed53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22608930$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Matsumura, Noboru, MD, PhD</creatorcontrib><creatorcontrib>Nakamichi, Noriaki, MD</creatorcontrib><creatorcontrib>Ikegami, Hiroyasu, MD, PhD</creatorcontrib><creatorcontrib>Nagura, Takeo, MD, PhD</creatorcontrib><creatorcontrib>Imanishi, Nobuaki, MD, PhD</creatorcontrib><creatorcontrib>Aiso, Sadakazu, MD, PhD</creatorcontrib><creatorcontrib>Toyama, Yoshiaki, MD, PhD</creatorcontrib><title>The function of the clavicle on scapular motion: a cadaveric study</title><title>Journal of shoulder and elbow surgery</title><addtitle>J Shoulder Elbow Surg</addtitle><description>Hypothesis The clavicle serves as a strut between the thorax and scapula, and lack of this function could affect shoulder mobility. We hypothesized that clavicular discontinuity changes shoulder kinematics, particularly affecting scapular motion. Materials and methods The study used 14 cadaveric shoulders. Cadavers were stabilized in the sitting position. Manual elevation in the sagittal, scapular, and coronal planes was performed in the intact and clavicular discontinuity models. The thorax-scapula distance and 3-dimensional scapular motion during shoulder elevation were recorded using an electromagnetic tracking device. The differences between the 2 experimental models at each position were analyzed. Results Clavicular discontinuity resulted in a decreased thorax-scapula distance and in reduced external rotation, upward rotation, and posterior tilting of the scapula. The kinematic changes were observed during elevations in all 3 planes but were greatest in the sagittal plane compared with the scapular and coronal planes. Conclusions The findings of this study revealed that discontinuity of the clavicle affects shoulder kinematics. Because of its anatomic shape and position, the clavicle stabilizes the external, upward, and posterior rotation of the scapula during arm movement. This function of the clavicle may assist glenohumeral joint motion and help prevent subacromial impingement.</description><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Biomechanical Phenomena</subject><subject>Cadaver</subject><subject>Clavicle - physiology</subject><subject>Female</subject><subject>Humans</subject><subject>Humerus - physiology</subject><subject>Male</subject><subject>Motion</subject><subject>Orthopedics</subject><subject>Rotation</subject><subject>Scapula - physiology</subject><subject>Thorax - physiology</subject><issn>1058-2746</issn><issn>1532-6500</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNo9kE1LxDAQhoMorq7-AC_So5euk6SfHgRd_IIFD67nkCZTTE3bNWkX9t-bsqvhhcwM77wwDyFXFBYUaHbbLBqPCwaULSAIsiNyRlPO4iwFOA41pEXM8iSbkXPvGwAoE2CnZMZYBkXJ4Yw8rr8wqsdODabvor6OhtArK7dGWYzCyCu5Ga10UdtPlrtIRkpquUVnVOSHUe8uyEktrcfLwz8nn89P6-VrvHp_eVs-rGLF02yIOS_K8IAqznmuao5BWaXTJM0VVqDzpK51UiJlVaJzRFlrxmRZcFVR1Cmfk5t97sb1PyP6QbTGK7RWdtiPXlBOWcFLFuLnhO6tyvXeO6zFxplWup2gICZ0ohEBnZjQCQiCLOxcH-LHqkX9v_HHKhju9wYMR24NOqGs6YyS9ht36Jt-dF24X1DhQ6L4mOhP8CmbwOec_wLhCn82</recordid><startdate>20130301</startdate><enddate>20130301</enddate><creator>Matsumura, Noboru, MD, PhD</creator><creator>Nakamichi, Noriaki, MD</creator><creator>Ikegami, Hiroyasu, MD, PhD</creator><creator>Nagura, Takeo, MD, PhD</creator><creator>Imanishi, Nobuaki, MD, PhD</creator><creator>Aiso, Sadakazu, MD, PhD</creator><creator>Toyama, Yoshiaki, MD, PhD</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20130301</creationdate><title>The function of the clavicle on scapular motion: a cadaveric study</title><author>Matsumura, Noboru, MD, PhD ; Nakamichi, Noriaki, MD ; Ikegami, Hiroyasu, MD, PhD ; Nagura, Takeo, MD, PhD ; Imanishi, Nobuaki, MD, PhD ; Aiso, Sadakazu, MD, PhD ; Toyama, Yoshiaki, MD, PhD</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-338999901c3337cf3ef3e6bd5457ceb0d74ffd49e12b4d7eeafd22a983cb1ed53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Biomechanical Phenomena</topic><topic>Cadaver</topic><topic>Clavicle - physiology</topic><topic>Female</topic><topic>Humans</topic><topic>Humerus - physiology</topic><topic>Male</topic><topic>Motion</topic><topic>Orthopedics</topic><topic>Rotation</topic><topic>Scapula - physiology</topic><topic>Thorax - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Matsumura, Noboru, MD, PhD</creatorcontrib><creatorcontrib>Nakamichi, Noriaki, MD</creatorcontrib><creatorcontrib>Ikegami, Hiroyasu, MD, PhD</creatorcontrib><creatorcontrib>Nagura, Takeo, MD, PhD</creatorcontrib><creatorcontrib>Imanishi, Nobuaki, MD, PhD</creatorcontrib><creatorcontrib>Aiso, Sadakazu, MD, PhD</creatorcontrib><creatorcontrib>Toyama, Yoshiaki, MD, PhD</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of shoulder and elbow surgery</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Matsumura, Noboru, MD, PhD</au><au>Nakamichi, Noriaki, MD</au><au>Ikegami, Hiroyasu, MD, PhD</au><au>Nagura, Takeo, MD, PhD</au><au>Imanishi, Nobuaki, MD, PhD</au><au>Aiso, Sadakazu, MD, PhD</au><au>Toyama, Yoshiaki, MD, PhD</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The function of the clavicle on scapular motion: a cadaveric study</atitle><jtitle>Journal of shoulder and elbow surgery</jtitle><addtitle>J Shoulder Elbow Surg</addtitle><date>2013-03-01</date><risdate>2013</risdate><volume>22</volume><issue>3</issue><spage>333</spage><epage>339</epage><pages>333-339</pages><issn>1058-2746</issn><eissn>1532-6500</eissn><abstract>Hypothesis The clavicle serves as a strut between the thorax and scapula, and lack of this function could affect shoulder mobility. We hypothesized that clavicular discontinuity changes shoulder kinematics, particularly affecting scapular motion. Materials and methods The study used 14 cadaveric shoulders. Cadavers were stabilized in the sitting position. Manual elevation in the sagittal, scapular, and coronal planes was performed in the intact and clavicular discontinuity models. The thorax-scapula distance and 3-dimensional scapular motion during shoulder elevation were recorded using an electromagnetic tracking device. The differences between the 2 experimental models at each position were analyzed. Results Clavicular discontinuity resulted in a decreased thorax-scapula distance and in reduced external rotation, upward rotation, and posterior tilting of the scapula. The kinematic changes were observed during elevations in all 3 planes but were greatest in the sagittal plane compared with the scapular and coronal planes. Conclusions The findings of this study revealed that discontinuity of the clavicle affects shoulder kinematics. Because of its anatomic shape and position, the clavicle stabilizes the external, upward, and posterior rotation of the scapula during arm movement. This function of the clavicle may assist glenohumeral joint motion and help prevent subacromial impingement.</abstract><cop>United States</cop><pmid>22608930</pmid><doi>10.1016/j.jse.2012.02.006</doi><tpages>7</tpages></addata></record> |
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subjects | Aged Aged, 80 and over Biomechanical Phenomena Cadaver Clavicle - physiology Female Humans Humerus - physiology Male Motion Orthopedics Rotation Scapula - physiology Thorax - physiology |
title | The function of the clavicle on scapular motion: a cadaveric study |
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