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


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