Posterior interosseous nerve

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Nerve: Posterior interosseous nerve
The Supinator. (Dorsal interosseous nerve labeled at right.)
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Latin	nervus interosseus antebrachii posterior
Gray's	subject #210 944
Innervates
From	deep branch of the radial nerve
To
MeSH	[1]

After crossing the supinator muscle, the deep branch of the radial nerve, considerably diminished in size, descends as the posterior interosseous nerve (or dorsal interosseous nerve), 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.

It supplies all the muscles on the radial side and dorsal surface of the forearm, excepting the Anconæus, Brachioradialis, and Extensor carpi radialis longus.

See also

• Anterior interosseous nerve

External links

• Dictionary at eMedicine posterior+interosseous+nerve

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.