Scapulohumeral muscles

Scapulohumeral muscles refer to a group of muscles, including the supraspinatus, infraspinatus, teres minor, subscapularis, and deltoid, that are responsible for creating rotation of the scapula. These muscles work together as a "force couple" to offset opposing translatory force components, resulting in almost pure rotation of the scapula. The scapulohumeral muscle group plays a significant role in dynamic stabilization of the glenohumeral joint.From: Kinematic MRI of the Joints [2019], Orthopaedic Biomechanics [2019]

The shoulder and pectoral girdle

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Purchase Book

Published in Ashley W. Blom, David Warwick, Michael R. Whitehouse, Apley and Solomon’s System of Orthopaedics and Trauma, 2017

Andrew Cole

The indications for shoulder arthrodesis are: paralysis of the scapulohumeral musclesinfective disorders of the glenohumeral joint (including tuberculous arthritis)advanced erosive arthritis with massive disruption of the rotator cufffailed total shoulder arthroplastyuncontrolled instability.

Modeling the effects of musculoskeletal geometry on scapulohumeral muscle moment arms and lines of action

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Journal Information

Published in Computer Methods in Biomechanics and Biomedical Engineering, 2019

Daanish M. Mulla, Joanne N. Hodder, Monica R. Maly, James L. Lyons, Peter J. Keir

The modified DSEM (Blana et al. 2008) was used. The model includes three rotational degrees of freedom at the sternoclavicular, acromioclavicular, and glenohumeral (GH) joints. Coordinate systems were transformed to match standardized conventions (Wu et al. 2005) (Supplementary Figure A1). Scapulohumeral muscles were of focus (Table 1), with each muscle composed of a number of elements, representing distinct groups of muscle fascicles. Pathways are modelled as the shortest distance connecting attachment sites, with wrapping objects preventing bone penetration.

Scapulohumeral muscles

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The shoulder and pectoral girdle

Modeling the effects of musculoskeletal geometry on scapulohumeral muscle moment arms and lines of action