The supraspinatus muscle (or simply supraspinatus, Latin: musculus supraspinatus) is a triangular muscle of the shoulder girdle, which belongs to the group of rotator cuff muscles.
The supraspinatus originates from the walls of the supraspinous fossa of the scapula.
The supraspinatus completely fills the supraspinous fossa, passes laterally and inserts onto the greater tubercle of the humerus.
The supraspinatus provides abduction of the upper arm and stabilizes the glenohumeral joint.
The supraspinatus muscle is innervated by the suprascapular nerve (C5).
The arterial blood to the supraspinatus is mainly supplied by the suprascapular artery, which is a branch of the thyrocervical trunk in the neck.