Deep branch of ulnar nerve

Deep branch of ulnar nerve
Superficial palmar nerves. (Deep branch of ulnar labeled at center right.)
Details
From palmar branch of ulnar nerve
Innervates Dorsal interossei, Palmar interossei, lumbricals #3 and 4, Adductor Pollicis, Hypothenar eminence
Identifiers
Latin ramus profundus nervi ulnaris
TA A14.2.03.048
FMA 44877
Anatomical terms of neuroanatomy

The deep branch of the ulnar nerve is a terminal, primarily motor branch of the ulnar nerve.[1]

It is accompanied by the deep palmar branch of ulnar artery.

Structure

It passes between the abductor digiti minimi and the flexor digiti minimi brevis.

It then perforates the opponens digiti minimi and follows the course of the deep palmar arch beneath the flexor tendons.

Function

At its origin it innervates the hypothenar muscles.

As it crosses the deep part of the hand, it innervates all the interosseous muscles and the third and fourth lumbricals.

It ends by innervating the adductor pollicis and the medial (deep) head of the flexor pollicis brevis.

It also sends articular filaments to the wrist-joint (following Hilton's law)

References

This article incorporates text in the public domain from page 942 of the 20th edition of Gray's Anatomy (1918)

  1. ↑ Ellis, Harold; Susan Standring; Gray, Henry David (2005). Gray's anatomy: the anatomical basis of clinical practice. St. Louis, Mo: Elsevier Churchill Livingstone. p. 726. ISBN 0-443-07168-3.
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