Everything about The Posterior Interosseous Nerve totally explained
The
posterior interosseous nerve (or
dorsal interosseous nerve) is a
nerve in the foream. It is the continuation of the
deep branch of the radial nerve, after this has crossed the
supinator muscle. It is considerably diminished in size compared to the
deep branch of the radial nerve. The nerve fibers originate from
cervical segments C7 and C8.
Course
It descends on the
interosseous membrane, in front of the
Extensor pollicis longus, to the back of the
carpus, where it presents a gangliform enlargement from which filaments are distributed to the ligaments and articulations of the carpus.
Supply
It supplies all the muscles on the radial side and dorsal surface of the forearm, excepting the
Anconæus,
Brachioradialis,
Extensor carpi radialis longus. In other words, it supplies the following muscles:
Further Information
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