The relative strengths of the rotator cuff muscles : a cadaver study
We studied five cadaver shoulders to determine the strength relationship of the four rotator cuff muscles. The mean fibre length and volume of each muscle were measured, from which the physiological cross-sectional area was calculated. This value was used to estimate the force which each muscle was...
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| Veröffentlicht in: | Journal of bone and joint surgery. British volume 1993, Vol.75 (1), p.137-140 |
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| container_title | Journal of bone and joint surgery. British volume |
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| creator | KEATING, J. F WATERWORTH, P SHAW-DUNN, J CROSSAN, J |
| description | We studied five cadaver shoulders to determine the strength relationship of the four rotator cuff muscles. The mean fibre length and volume of each muscle were measured, from which the physiological cross-sectional area was calculated. This value was used to estimate the force which each muscle was capable of generating. The lever arm of each muscle about the humeral head was then measured and the moment exerted was calculated. The strength ratios between the muscles were more or less constant in the five specimens. Subscapularis was the most powerful muscle and contributed 53% of the cuff moment; supraspinatus contributed 14%, infraspinatus 22% and teres minor 10%. The force-generating capacity of the subscapularis was equal to that of the other three muscles combined. |
| doi_str_mv | 10.1302/0301-620x.75b1.8421011 |
| format | Article |
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F ; WATERWORTH, P ; SHAW-DUNN, J ; CROSSAN, J</creator><creatorcontrib>KEATING, J. F ; WATERWORTH, P ; SHAW-DUNN, J ; CROSSAN, J</creatorcontrib><description>We studied five cadaver shoulders to determine the strength relationship of the four rotator cuff muscles. The mean fibre length and volume of each muscle were measured, from which the physiological cross-sectional area was calculated. This value was used to estimate the force which each muscle was capable of generating. The lever arm of each muscle about the humeral head was then measured and the moment exerted was calculated. The strength ratios between the muscles were more or less constant in the five specimens. Subscapularis was the most powerful muscle and contributed 53% of the cuff moment; supraspinatus contributed 14%, infraspinatus 22% and teres minor 10%. The force-generating capacity of the subscapularis was equal to that of the other three muscles combined.</description><identifier>ISSN: 0301-620X</identifier><identifier>EISSN: 2044-5377</identifier><identifier>DOI: 10.1302/0301-620x.75b1.8421011</identifier><identifier>PMID: 8421011</identifier><identifier>CODEN: JBSUAK</identifier><language>eng</language><publisher>London: British Editorial Society of Bone and Joint Surgery</publisher><subject>Biological and medical sciences ; Fundamental and applied biological sciences. Psychology ; Humans ; Movement ; Muscle Contraction ; Muscles - physiology ; Rotator Cuff ; Shoulder Joint - physiology ; Skeleton and joints ; Vertebrates: osteoarticular system, musculoskeletal system</subject><ispartof>Journal of bone and joint surgery. 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Subscapularis was the most powerful muscle and contributed 53% of the cuff moment; supraspinatus contributed 14%, infraspinatus 22% and teres minor 10%. The force-generating capacity of the subscapularis was equal to that of the other three muscles combined.</description><subject>Biological and medical sciences</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Movement</subject><subject>Muscle Contraction</subject><subject>Muscles - physiology</subject><subject>Rotator Cuff</subject><subject>Shoulder Joint - physiology</subject><subject>Skeleton and joints</subject><subject>Vertebrates: osteoarticular system, musculoskeletal system</subject><issn>0301-620X</issn><issn>2044-5377</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkDtPwzAURi0EKqXwE0AeEFuKn3HCBuUpVWIpEpt149g0KG2K7VT035OoASYP3znX0kHogpIp5YRdE05okjLyPVWyoNNMMEooPUBjRoRIJFfqEI1_ofdjdBLCJyFESMlHaDTgY3S_WFrsbQ2x2locorfrj7gMuHE49ksTITYem9Y5vGqDqW3ANxiwgRK21ndGW-5O0ZGDOtiz4Z2gt8eHxew5mb8-vcxu54kRhMbEQGoMA8Vyk2WKiJRlLGdQKlpwkquUgVBgnStVqoqsFJbnhihXSJkpnirJJ-hqf3fjm6_WhqhXVTC2rmFtmzZoJaWiMs07MN2DxjcheOv0xlcr8DtNie7z6b6M7st00h3VQ49OPB9-aIuVLf-0__1y2CEYqJ2HtanCHyakkkJQ_gPsanai</recordid><startdate>1993</startdate><enddate>1993</enddate><creator>KEATING, J. 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Psychology</topic><topic>Humans</topic><topic>Movement</topic><topic>Muscle Contraction</topic><topic>Muscles - physiology</topic><topic>Rotator Cuff</topic><topic>Shoulder Joint - physiology</topic><topic>Skeleton and joints</topic><topic>Vertebrates: osteoarticular system, musculoskeletal system</topic><toplevel>online_resources</toplevel><creatorcontrib>KEATING, J. F</creatorcontrib><creatorcontrib>WATERWORTH, P</creatorcontrib><creatorcontrib>SHAW-DUNN, J</creatorcontrib><creatorcontrib>CROSSAN, J</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 bone and joint surgery. 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| ispartof | Journal of bone and joint surgery. British volume, 1993, Vol.75 (1), p.137-140 |
| issn | 0301-620X 2044-5377 |
| language | eng |
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| source | MEDLINE; Alma/SFX Local Collection |
| subjects | Biological and medical sciences Fundamental and applied biological sciences. Psychology Humans Movement Muscle Contraction Muscles - physiology Rotator Cuff Shoulder Joint - physiology Skeleton and joints Vertebrates: osteoarticular system, musculoskeletal system |
| title | The relative strengths of the rotator cuff muscles : a cadaver study |
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