Atrophy of the teres minor muscle is often a consequence of a rotator cuff tear.

Full-thickness tendon tears did not affect the pennation angle of the subscapularis or teres minor muscles.

The axillary nerve is a branch of the brachial plexus that innervates the deltoid and teres minor muscles.

Subsequently the transducer has to be slided inferiorly, maintaining the same orientation in order to reach the teres minor muscle tendon unit.

Together with teres minor muscle, teres major muscle forms the axillary space, through which several important arteries and veins pass.

The axillary space is an anatomic space, bounded by teres major muscle, teres minor muscle and humerus.

Paralysis of the teres minor muscle and deltoid muscle, resulting in loss of abduction of arm (from 15-90 degrees), weak flexion, extension, and rotation of shoulder.

The axillary nerve comes from the posterior cord of the brachial plexus at the coracoid process and provides the motor function to the deltoid and teres minor muscles.