Origin
Anterior surface & medial half of clavicle; anterior surface of sternum; superior six costal cartilages
Insertion
Lateral lip of bicipital groove
Actions
- Humerus adduction
- Humerus medial rotation
- Humerus flexion (clavicular head)
- Humerus extension (sternocostal head)
Innervation
- Medial and lateral pectoral nerves (C5-T1)
Blood Supply
- Pectoral branch of the thoracoacromial trunk
Would you like to learn more about the pectoralis major muscle? Then check out the pectoralis major muscle article and video by clicking the link below: Pectoralis Major Muscle Anatomy
