Posterior interosseous nerve

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
From	Deep branch of the radial nerve
Innervates	Extensor carpi radialis brevis; Extensor digitorum; Extensor digiti minimi; Extensor carpi ulnaris; Supinator muscle; Abductor pollicis longus; Extensor pollicis brevis; Extensor pollicis longus; Extensor indicis;
Identifiers
Latin	nervus interosseus antebrachii posterior
TA98	A14.2.03.055
TA2	6437
FMA	77559
	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.