Three-dimensional kinematics of glenohumeral elevation. 1991

K N An, and A O Browne, and S Korinek, and S Tanaka, and B F Morrey
Department of Orthopedics, Mayo Clinic/Mayo Foundation, Rochester, Minnesota 55905.

To help resolve longstanding uncertainties about kinematics of the shoulder, we studied three-dimensional glenohumeral joint motion during arm elevation. A magnetic tracking system was used to monitor the three-dimensional orientation of the humerus with respect to the scapula. Appropriate coordinate transformations were then performed for the calculation of glenohumeral joint rotation based on the defined Eulerian angle. The effects of the plane of elevation and the humeral rotation on the magnitude of arm elevation were documented. The maximum humeral elevation at the glenohumeral joint took place in a plane anterior to the scapular plane. Maximum elevation in all planes anterior to the scapular plane required external axial rotation of the humerus. Conversely, internal axial rotation was necessary for maximum elevation posterior to the scapular plane. Quantifying the obligatory axial rotation explains the relationship of internal and external rotation with maximum elevation.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D002102 Cadaver A dead body, usually a human body. Corpse,Cadavers,Corpses
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006811 Humerus Bone in humans and primates extending from the SHOULDER JOINT to the ELBOW JOINT. Humeri,Greater Tubercle,Humeral Greater Tuberosity,Humeral Lesser Tuberosity,Lesser Tubercle,Olecranon Fossa,Olecranon Fossi,Greater Tubercles,Greater Tuberosities, Humeral,Greater Tuberosity, Humeral,Humeral Greater Tuberosities,Humeral Lesser Tuberosities,Lesser Tubercles,Lesser Tuberosities, Humeral,Lesser Tuberosity, Humeral,Tubercle, Greater,Tubercles, Greater
D001696 Biomechanical Phenomena The properties, processes, and behavior of biological systems under the action of mechanical forces. Biomechanics,Kinematics,Biomechanic Phenomena,Mechanobiological Phenomena,Biomechanic,Biomechanic Phenomenas,Phenomena, Biomechanic,Phenomena, Biomechanical,Phenomena, Mechanobiological,Phenomenas, Biomechanic
D012785 Shoulder Joint The articulation between the head of the HUMERUS and the glenoid cavity of the SCAPULA. Glenohumeral Joint,Glenoid Labrum,Glenohumeral Joints,Joint, Glenohumeral,Joint, Shoulder,Joints, Glenohumeral,Joints, Shoulder,Labrum, Glenoid,Shoulder Joints

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