Posterior interosseous nerve

Posterior interosseous nerve
The supinator. (Deep branch of radial nerve labeled at upper right and lower right. Dorsal interosseous is this nerve after passing the supinator, at lower right.)
Details
FromDeep branch of the radial nerve
Innervates
Identifiers
Latinnervus interosseus antebrachii posterior
TA98A14.2.03.055
TA26437
FMA77559
Anatomical terms of neuroanatomy

The posterior interosseous nerve (or dorsal interosseous nerve/deep radial nerve) is a nerve in the forearm. 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 in the spinal column.