Shoulder abduction moment arms in three clinically important positions
Summary The abduction moment arms of 4 shoulder muscles were calculated in clinically important positions to evaluate the best test situation for the supraspinatus based on its mechanical advantage. Moment arms of the supraspinatus, infraspinatus, and middle and anterior deltoid in 18 individuals we...
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| Veröffentlicht in: | Journal of shoulder and elbow surgery 2009-07, Vol.18 (4), p.632-638 |
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| container_title | Journal of shoulder and elbow surgery |
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| creator | Ruckstuhl, Heidi, PhD Krzycki, Jacek, MD Petrou, Nassos, MD Favre, Philippe, MS Horn, Tamara, MS Schmid, Stefan, MS Stussi, Edgar, PhD |
| description | Summary The abduction moment arms of 4 shoulder muscles were calculated in clinically important positions to evaluate the best test situation for the supraspinatus based on its mechanical advantage. Moment arms of the supraspinatus, infraspinatus, and middle and anterior deltoid in 18 individuals were computed using individual magnetic resonance imaging data and a computer-assisted design tool for simulation. Three tests with the arm in the neutral position (arm hanging on side), at 90° of scaption, and at 90° of scaption and full internal humeral rotation (Jobe test) were investigated. The supraspinatus has a greater mechanical advantage vs the other tested muscles in the neutral arm position. In the Jobe position, the supraspinatus' abduction moment arm is reduced with increased internal humeral rotation. Comparing these results with the literature indicates that this new method is adequate for calculation of moment arms and may be used in any desired joint configuration. Level of evidence Basic science study. |
| doi_str_mv | 10.1016/j.jse.2008.10.021 |
| format | Article |
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Moment arms of the supraspinatus, infraspinatus, and middle and anterior deltoid in 18 individuals were computed using individual magnetic resonance imaging data and a computer-assisted design tool for simulation. Three tests with the arm in the neutral position (arm hanging on side), at 90° of scaption, and at 90° of scaption and full internal humeral rotation (Jobe test) were investigated. The supraspinatus has a greater mechanical advantage vs the other tested muscles in the neutral arm position. In the Jobe position, the supraspinatus' abduction moment arm is reduced with increased internal humeral rotation. Comparing these results with the literature indicates that this new method is adequate for calculation of moment arms and may be used in any desired joint configuration. 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Moment arms of the supraspinatus, infraspinatus, and middle and anterior deltoid in 18 individuals were computed using individual magnetic resonance imaging data and a computer-assisted design tool for simulation. Three tests with the arm in the neutral position (arm hanging on side), at 90° of scaption, and at 90° of scaption and full internal humeral rotation (Jobe test) were investigated. The supraspinatus has a greater mechanical advantage vs the other tested muscles in the neutral arm position. In the Jobe position, the supraspinatus' abduction moment arm is reduced with increased internal humeral rotation. Comparing these results with the literature indicates that this new method is adequate for calculation of moment arms and may be used in any desired joint configuration. Level of evidence Basic science study.</description><subject>Biological and medical sciences</subject><subject>Biomechanical Phenomena</subject><subject>Case-Control Studies</subject><subject>Computer Simulation</subject><subject>Diseases of the osteoarticular system</subject><subject>Humans</subject><subject>Image Processing, Computer-Assisted</subject><subject>Magnetic Resonance Imaging</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Muscle Contraction - physiology</subject><subject>Muscle, Skeletal - physiology</subject><subject>Orthopedics</subject><subject>Paraplegia</subject><subject>Range of Motion, Articular - physiology</subject><subject>Sensitivity and Specificity</subject><subject>Shoulder Joint - pathology</subject><subject>Shoulder Joint - physiology</subject><issn>1058-2746</issn><issn>1532-6500</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kU1r3DAQhkVpaD7aH9BL8aW9eTOSLNsiEAghaQOBHJKehSyPiVzb2mjswv77yuy2gR5ykkY87zB6hrHPHDYceHneb3rCjQCoU70Bwd-xE66kyEsF8D7dQdW5qIrymJ0S9QCgCxAf2DHXpVKF0Cfs9vE5LEOLMbNNu7jZhykbw4jTnNk4UuanbH6OiJkb_OSdHYZd5sdtiLNNyDaQXyP0kR11diD8dDjP2M_bm6frH_n9w_e766v73BWynPPKKV5bp7RyhRDWtrITDlsNnWyasi5qC0pYoTvXSW65bDTWqtNrXVUKQZ6xb_u-2xheFqTZjJ4cDoOdMCxkykopqXSRQL4HXQxEETuzjX60cWc4mFWe6U2SZ1Z561OSlzJfDs2XZsT2NXGwlYCvB8BSUtFFOzlP_zjBKyEquU55secwqfjtMRpyHqf0Ux_RzaYN_s0xLv9L_3X_C3dIfVjilBwbbkgYMI_rltclQw2QBuXyDzCZohI</recordid><startdate>20090701</startdate><enddate>20090701</enddate><creator>Ruckstuhl, Heidi, PhD</creator><creator>Krzycki, Jacek, MD</creator><creator>Petrou, Nassos, MD</creator><creator>Favre, Philippe, MS</creator><creator>Horn, Tamara, MS</creator><creator>Schmid, Stefan, MS</creator><creator>Stussi, Edgar, PhD</creator><general>Mosby, Inc</general><general>Elsevier</general><scope>IQODW</scope><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>20090701</creationdate><title>Shoulder abduction moment arms in three clinically important positions</title><author>Ruckstuhl, Heidi, PhD ; Krzycki, Jacek, MD ; Petrou, Nassos, MD ; Favre, Philippe, MS ; Horn, Tamara, MS ; Schmid, Stefan, MS ; Stussi, Edgar, PhD</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c436t-7c518ac595c422aad3f2ced90f3bb6848a052a29fcf31a13b9e85f99fcf775e03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Biological and medical sciences</topic><topic>Biomechanical Phenomena</topic><topic>Case-Control Studies</topic><topic>Computer Simulation</topic><topic>Diseases of the osteoarticular system</topic><topic>Humans</topic><topic>Image Processing, Computer-Assisted</topic><topic>Magnetic Resonance Imaging</topic><topic>Male</topic><topic>Medical sciences</topic><topic>Muscle Contraction - physiology</topic><topic>Muscle, Skeletal - physiology</topic><topic>Orthopedics</topic><topic>Paraplegia</topic><topic>Range of Motion, Articular - physiology</topic><topic>Sensitivity and Specificity</topic><topic>Shoulder Joint - pathology</topic><topic>Shoulder Joint - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ruckstuhl, Heidi, PhD</creatorcontrib><creatorcontrib>Krzycki, Jacek, MD</creatorcontrib><creatorcontrib>Petrou, Nassos, MD</creatorcontrib><creatorcontrib>Favre, Philippe, MS</creatorcontrib><creatorcontrib>Horn, Tamara, MS</creatorcontrib><creatorcontrib>Schmid, Stefan, MS</creatorcontrib><creatorcontrib>Stussi, Edgar, PhD</creatorcontrib><collection>Pascal-Francis</collection><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>Ruckstuhl, Heidi, PhD</au><au>Krzycki, Jacek, MD</au><au>Petrou, Nassos, MD</au><au>Favre, Philippe, MS</au><au>Horn, Tamara, MS</au><au>Schmid, Stefan, MS</au><au>Stussi, Edgar, PhD</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Shoulder abduction moment arms in three clinically important positions</atitle><jtitle>Journal of shoulder and elbow surgery</jtitle><addtitle>J Shoulder Elbow Surg</addtitle><date>2009-07-01</date><risdate>2009</risdate><volume>18</volume><issue>4</issue><spage>632</spage><epage>638</epage><pages>632-638</pages><issn>1058-2746</issn><eissn>1532-6500</eissn><abstract>Summary The abduction moment arms of 4 shoulder muscles were calculated in clinically important positions to evaluate the best test situation for the supraspinatus based on its mechanical advantage. 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| subjects | Biological and medical sciences Biomechanical Phenomena Case-Control Studies Computer Simulation Diseases of the osteoarticular system Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging Male Medical sciences Muscle Contraction - physiology Muscle, Skeletal - physiology Orthopedics Paraplegia Range of Motion, Articular - physiology Sensitivity and Specificity Shoulder Joint - pathology Shoulder Joint - physiology |
| title | Shoulder abduction moment arms in three clinically important positions |
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