Supraspinatus

Musculus supraspinatus

Upper Body ShouldersRotator CuffUpper Body

The supraspinatus sits in the supraspinous fossa and initiates the first ~15 degrees of arm abduction before the deltoid takes over. As a rotator cuff muscle it compresses the humeral head into the glenoid, keeping the joint centered. Its tendon passes under the acromion and is the most commonly torn or impinged structure in the cuff, so prehab and controlled overhead loading matter for lifters.

Actions

Shoulder abduction (initiation, first ~15 degrees), Stabilization of the glenohumeral joint

Origin

Supraspinous fossa of the scapula

Insertion

Superior facet of the greater tubercle of the humerus

Innervation

Suprascapular nerve (C5, C6)

Blood supply

Suprascapular artery

Wikipedia ↗

shoulderrotator-cuffstabilizerabductionupper-body