Supraspinatus

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Original Author(s): Oliver Jones
Last updated: October 9, 2022
Revisions: 5

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The supraspinatus is an intrinsic muscle of the shoulder region. It is part of the rotator cuff muscle group.

Attachments: Originates from the supraspinous fossa of the scapula and attaches to the greater tubercle of the humerus.
Actions: Abduction of the upper limb at the shouler. It performs the first 0-15^o of abduction, and assists the deltoid muscle for 15-90^o
Innervation: Suprascapular nerve.
Blood supply: Suprascapular artery

Fig 1 – The rotator cuff muscles, which act to stabilise the shoulder joint.