supraspinatus

The MUSCOLO SOVRASPINATO originates from the 2/3 medialis of the supraspinished fossa of the scapula; it runs laterally above the joint capsule to which it adheres and passes below the achromial end of the clavicle.

It is inserted into the upper facet of the large tuberosity of the humerus. By contracting, it abducts and extracts the arm.

With its action, it abducts and rotates outside (extraterridges) the arm, in synergy with the action of the deltoid. It also helps to bind the humerus to the shoulder and to tighten the joint capsule.

It is innervated by the suprascapular nerve (C4-C6).

The supraspinatus is the most frequently damaged muscle among those that make up the rotator cuff.

ORIGIN From the 2/3 medialis of the supraspinous fossa and from the homonymous band of the scapula
INSERTION Upper face of the great humeral tuberosity
ACTION It binds the humerus to the scapula, tightens the joint capsule, abducts and rotates the arm on the outside
INNERVATION OVERSCAPOLAR NERVE (C4-C6)

Upper limb

Lower limb

Trunk

Abdomen

Articles