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Pronator teres. The pronator teres muscle is located on the palmar side of the forearm, below the elbow. Aided by the pronator quadratus, its function is to rotate the forearm palm-down. This is also known as pronation. The pronator teres muscle has two heads: the humeral head and the ulnar head. As the names imply, they connect the ends of the humerus and the ulna to the radius.
The teres minor is a slim, narrow muscle within the rotator cuff, located in the shoulder. It is involved in the external rotation of the shoulder joint.The other muscles composing the rotator cuff are the supraspinatus, infraspinatus, and subscapularis.It connects the scapula to the humerus, along with the teres major and infraspinatus muscles, which lie on either side and overlap the teres minor.he teres minor is a slim, narrow muscle within the rotator cuff, located in the shoulder. It is involved in the external rotation of the shoulder joint.