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Flexor carpi radialis muscle
From Wikipedia, the free encyclopedia
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| Flexor carpi radialis muscle | ||
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| Front of the left forearm. Superficial muscles. (Flexor carpi radialis and its tendon visible in blue.) | ||
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| Front of right upper extremity. (Flex. carp. rad. labeled at upper left.) | ||
| Latin | musculus flexor carpi radialis | |
| Gray's | subject #125 446 | |
| Origin: | medial epicondyle of humerus (common flexor tendon) | |
| Insertion: | Bases of second and third metacarpal bones | |
| Artery: | ulnar artery | |
| Nerve: | Median nerve | |
| Action: | Flexion and abduction at wrist | |
| Antagonist: | Extensor carpi radialis brevis muscle, Extensor carpi radialis longus muscle | |
| Dorlands/Elsevier | m_22/12549030 | |
In anatomy, flexor carpi radialis is a muscle of the human forearm that acts to flex and abduct the hand.
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This muscle starts at the medial epicondyle of the humerus (as does flexor carpi ulnaris muscle) and attaches to the anterior side of the base of the 2nd metacarpal.
It runs just laterally of flexor digitorum superficialis, and the tendon of flexor carpi radialis can be seen on the anterior of the distal forearm.
On a person's distal forearm, right before the wrist, they will see either two or three tendons. Flexor carpi radialis is the most lateral (closest to the thumb) of these. (The most medial one is flexor carpi ulnaris, and the middle one, if it exists is palmaris longus.)
As are most of the flexors of the hand, FCR is innervated by the median nerve. It gets its blood from the ulnar artery.
The muscle, like all flexors of the forearm, can be strengthened by exercises that resist its flexion. A wrist roller can be used and wrist curls with dumbbells can also be performed.
 Cross-section through the middle of the forearm. |
 Transverse section across distal ends of radius and ulna. |
 Transverse section across the wrist and digits. |
 The mucous sheaths of the tendons on the front of the wrist and digits. |
 The muscles of the thumb. |
 The muscles of the left hand. Palmar surface. |