The flexor carpi radialis muscle is one of 4 muscles within the superficial layer of the anterior compartment of the forearm, and is responsible for flexion and abduction at the wrist joint.
The other muscles in this layer are the flexor carpi ulnaris, palmaris longus and pronator teres. It is located between the palmaris longus and the pronator teres.
The muscles of the superficial layer share a common origin from the medial epicondyle of the humerus.
The flexor carpi radialis can be easily palpated within the distal forearm, just lateral to the midline. It is a useful landmark, as just lateral to this tendon, the radial pulse can be palpated.
| Origin | Medial epicondyle of the humerus (common flexor origin) |
|---|---|
| Insertion | Bases of metacarpals II (index) and III (middle) |
| Innervation | Median Nerve |
| Blood Supply | Ulnar artery |
| Antagonist | Extensor carpi ulnaris |
| Action | Flexion and abduction at the wrist |