Long radius extensor of wrist
Long radius of the extensor carpus , m. Extensor carpi radialis longus, spindle-shaped muscle with a narrow tendon, much longer than the abdomen. In the upper part of the muscle is slightly covered m. Brachioradialis, in the distal part the tendon of the muscle is oblique, from top to bottom, intersected by m. Abductor pollicis longus and m. Extensor pollicis brevis. It begins under the lateral epicondyle of the humerus and the lateral intermuscular septum of the shoulder, is directed downward, passes into the tendon, which, passing under the extensor retainer, is attached to the base of the dorsal surface of the second metacarpal bone.
Function: flexes the arm at the elbow joint, unbends the hand and takes part in its lead.
Innervation: n. Radialis (CV-CVII).
Blood supply: a. Radialis, a. Collateralis radialis a. Recurrens radialis.
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