which muscle will depress the scapula or elevate the ribs
1 Pectoralis minor draws the scapula forward and downward, and raises the ribs in forced inspiration. 2  The subclavius muscle is a small muscle that lies deep to pectoralis major muscle. 3  It passes from rib I at the junction between the rib and its costal cartilage to a groove on the inferior (lower) surface of the clavicle. These muscles retract and elevate the scapula. 2  Teres major muscle originates from posterior surface of the inferior angle of the scapula and attaches the medial lip of the intertubercular sulcus which lies on the anterior surface of the humerus. 3  This muscle extends and medially rotates the humerus.