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supraspinatus (muscle)

 

Definition: intrinsic (scapulohumeral) muscle of shoulder joint, the tendon of which contributes to the rotator cuff; origin, supraspinous fossa of scapula; insertion, greater tuberosity of humerus; action, initiates abduction of arm; its tonic contraction helps to hold the head of the humerus in the shallow glenoid fossa; nerve supply, suprascapular from fifth and sixth cervical.

Synonym(s): musculus supraspinatusTA, supraspinous muscle

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