Pectoralis Major
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Pectoralis Major
A thick fan-shaped muscle covering upper part of chest
Pectoralis Major Action
Flexes, adducts, medially rotates arm
Pectoralis Major Insertion
Intertubercular sulcus of humerus
Pectoralis Major Origin
Medial 1/2 of clavicle, body of sternum, cartilages ribs 2-6