Pectoralis Major – Essentials

Actions

• Flexes humerus
• Extends humerus
• Horizontally adducts rotates
• Medially rotates humerus
• Abducts humerus

Origin

• Medial 1/2 of clavicle
• Costal cartilages of first six ribs
• Sternum

Insertion

• Lateral lip of bicipital groove of humerus

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