TABLE OF MUSCLES OF PECTORAL REGION

MUSCLE	ORIGIN	INSERTION	ACTION	NERVE SUPPLY
pectoralis major	medial half of clavicle sternum costal cartilages aponeurosis of external oblique muscle	lateral lip of intertubercular groove of humerus	flexes, adducts, and rotates arm medially	medial and lateral pectoral nerves brachial plexus
pectoralis minor	anterior aspect of 2nd-5th ribs	coracoid process of scapula	protracts the scapula pulls it forward and down	medial pectoral nerve brachial plexus
subclavius	junction of the 1st rib with its costal cartilage	inferior surface of clavicle	pulls clavicle towards the sternum	nerve to subclavius brachial plexus