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 ulnarispalmaris 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