Extensor carpi ulnaris muscle
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Extensor carpis ulnaris (ECU) is a muscle of the superficial layer onof the posterior compartment of the forearm. It is frequently separated from the extensor digitorum and the extensor digiti minimi muscles by a distinct intermuscular septum. It is the only forearm extensor that lies in its own fibro-osseous tunnel at the level of the wrist.
Summary
- origin: lateral epicondyle of humerus, radial collateral ligament and posterior border of ulna
- insertion: base of 5th metacarpal on posterior surface
- innervation: posterior interosseous nerve the continuation of deep radial nerve (C6-C8)
- action: extension and abduction of the wrist joint; ECRB is the prime extensor of a wrist
-<p><strong>Extensor carpis ulnaris (ECU)</strong> is a muscle of superficial layer on posterior compartment of the <a title="Forearm" href="/articles/forearm">forearm</a>. It is frequently separated from the <a title="extensor digitorum" href="/articles/extensor-digitorum">extensor digitorum</a> and the <a title="extensor digiti minimi" href="/articles/extensor-digiti-minimi">extensor digiti minimi</a> muscles by a distinct intermuscular septum. It is the only forearm extensor that lies in its own <a title="Extensor compartment of the wrist" href="/articles/extensor-compartments-of-the-wrist">fibro-osseous tunnel</a> at the level of the wrist.</p><h4>Summary</h4><ul>- +<p><strong>Extensor carpis ulnaris (ECU)</strong> is a muscle of the superficial layer of the posterior compartment of the <a href="/articles/forearm">forearm</a>. It is frequently separated from the <a href="/articles/extensor-digitorum">extensor digitorum</a> and the <a href="/articles/extensor-digiti-minimi">extensor digiti minimi</a> muscles by a distinct intermuscular septum. It is the only forearm extensor that lies in its own <a href="/articles/extensor-compartments-of-the-wrist">fibro-osseous tunnel</a> at the level of the wrist.</p><h4>Summary</h4><ul>
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