what is the origin of the pronator teres
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.