Flexor Carpi Radialis Muscle

Flexor carpi radialis is one of the flexor muscles of anterior compartment of forearm. It is located medially to the pronator teres muscle. FCR has a long tendon and starts in the mid of the forearm, reaching the wrist. The tendon passes through the flexor retinaculum while entering the wrist and it is a good indicator for spotting radial artery that is present lateral to it.

Deltoid Muscle Biceps Brachii Brachioradialis Muscle Palmaris Longus Muscle Extensor Carpi Radialis Longus Muscle Extensor Retinaculum Dorsal Interossei Muscle Extensor Carpi Ulnaris Muscle Extensor Digitorum Communis Muscle Extensor Carpi Radialis Brevis Muscle Triceps Brachii Muscle Biceps Brachii Muscle Posterior Brachialis Muscle

Flexor Carpi Radialis Muscle

SHAPE

FCR is a long and fusiform muscle.

ORIGIN AND INSERTION

It originates from medial epicondyle of humerus, also known as common flexor origin and ends up attaching distally to base of second metacarpal bone. Its tendon lies in its own tendinous sheath as it traverses through wrist.

BLOOD SUPPLY

Ulnar artery is responsible for its arterial supply via small muscular branches.

NERVE SUPPLY

FCR is innervated by median nerve (C6, C7), arising from brachial plexus.

FUNCTIONS

Flexor carpi radialis performs two important functions of flexing and abducting the hand at wrist joint. For testing this muscle, the patient is asked to flex the wrist against some resistance and its tendon can be seen and palpated normally.

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