Pronator Teres works the hardest when the elbow is flexing the hand simultaneously pronating.
- Origin: Medial supracondylar ridge of the humerus & medial side of the coronoid process of the ulna.
- Insertion: Middle 1/3 of the outer surface of the radius
- Actions: Pronation. Elbow flexion
- Innervation: Median nerve
- Daily uses: Turning a screwdriver