The brachialis is the deepest muscle of the three muscles within the anterior compartment of the arm. The other muscles are the biceps brachii and the coracobrachialis.
| Origin | Anterior surface of the distal half of the humerus |
|---|---|
| Insertion | Tuberosity and coronoid process of the ulna |
| Innervation | Musculocutaneous nerve (C5-C6) and radial nerve (C7) |
| Blood Supply | Brachial artery |
| Action | Flexion of the forearm at the elbow joint. |