Pectoralis minor is a muscle of the anterior chest wall that inserts into the pectoral girdle. It lies deep to and is completely covered by pectoralis major.
It is an important anatomical landmark in the division of the axillary artery as well as in the distribution of axillary lymph nodes.
- origin - ribs 3-5
- insertion - coracoid process of the scapula
- innervation - medial and lateral pectoral nerve
- action
- depresses shoulder
- when scapula fixed, elevation of ribs 3-5