What is Pectoralis major muscle?
Pectoralis major muscle meaning Muscle involved in moving the humerus. It originates in the clavicle, sternum, and six upper ribs and inserts into the humerus. Its main functions are flexing, adducting, and rotating arm medially. Other muscles involved in moving the humerus are:CoracobrachialisDeltoidInfraspinatusLatissimus dorsiSupraspinatusTeres majorTeres minor