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subscapularis (muscle)

 

Definition: intrinsic (scapulohumeral) muscle of shoulder joint, the tendon of which contributes to the formation of the rotator cuff; origin, subscapular fossa; insertion, lesser tuberosity of humerus; action, rotates arm medially; its tonic contraction helps to hold the head of the humerus in the shallow glenoid fossa; nerve supply, upper and lower subscapular from posterior cord of brachial plexus (fifth and sixth cervical spinal nerves).

Synonym(s): musculus subscapularisTA, subscapular muscle

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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