extensor carpi ulnaris muscle


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ex·ten·sor car·pi ul·na·ris mus·cle

(eks-ten'sŏr kahr'pī ŭl-nā'ris mŭs'ĕl)
Origin, lateral epicondyle of humerus (humeral head) and oblique line and posterior border of ulna (ulnar head); insertion, base of fifth metacarpal bone; action, extends and abducts wrist ulnarward; nerve supply, radial (posterior interosseous).
Synonym(s): musculus extensor carpi ulnaris [TA] , ulnar extensor muscle of wrist.

extensor carpi ulnaris muscle

Forearm muscle. Origin: lateral epicondyle of humerus, proximal edge of ulna. Insertion: proximal end of fifth metacarpal. Nerve: radial (C7-C8). Action: adducts hand, extends wrist.
See: arm for illus. (Muscles of the Arm)
See also: muscle
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