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Anterior Gray's Anatomy plate highlighting the pectoralis major muscle
Gray's Anatomy, colorized by Michael Gasperl, Wikimedia Commons, public domain Image source

Chest

Pectoralis major

Adducts and medially rotates the arm. the clavicular fibers assist shoulder flexion

Origin
Medial clavicle, sternum, and costal cartilages of the upper ribs
Insertion
Lateral lip of the intertubercular sulcus of the humerus
Primary actions
Adducts and medially rotates the arm. the clavicular fibers assist shoulder flexion

Anatomy source

OpenStax Anatomy and Physiology 2e — Pectoral Girdle and Upper Limbs

Open reference

Educational anatomy reference only. This page does not diagnose pain, injury, or movement limitations.

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