Summary Pectoralis Major Origin Clavicular head: anterior surface of medial half of clavicle; Sternocostal head: anterior surface of sternum, superior six costal cartilages, and aponeurosis of external oblique muscle Insertion Lateral lip of intertubercular groove of humerus Action Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly; Acting alone: clavicular head flexes humerus and sternocostal head extends it Innervation Lateral and medial pectoral nerves (C5-T1) Arterial Supply pectoral branch of the thoracoacromial trunk
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All Videos (0) Podcasts (1) Anatomy⎪Pectoralis Major Anatomy - Pectoralis Major Listen Now 4:23 min 1/4/2021 68 plays 5.0 (1)