Pectoralis Minor

Wednesday, October 12, 2011

The pectoralis minor muscle arises from the 3rd, 4th, and 5th ribs and is inserted in the caracoid process. It is the only shoulder girdle muscle which is not inserted on bone in the free limb. The pectoralis minor is innervated by the medial pectoral nerve and supplied by the pectoral branch of the thoracoacromial trunk. It lowers and rotates the scapula.