Origin: Lateral third of the Clavicle, the upper surface of the acromion, and the spine of the Scapula

Insertion: Deltoid tuberosity of the Humerus

Function: Abducts the shoulder along with other Muscles which produce shoulder Abduction

Nerve: Circumflex anterior and posterior brances of the Axillary Nerve


Posterior humeral circumflex artery
Deltoid branch of Thoracoacromial artery
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