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Deep branch of ulnar nerve

FieldValue
NameDeep branch of ulnar nerve
Latinramus profundus nervi ulnaris
ImageGray815.png
CaptionSuperficial palmar nerves. (Deep branch of ulnar labeled at center right.)
Innervatesdorsal interossei, palmar interossei, lumbricals #3 and 4, adductor pollicis, hypothenar eminence
BranchFrompalmar branch of ulnar nerve

The deep branch of the ulnar nerve is a terminal, primarily motor branch of the ulnar nerve. 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. As the deep ulnar nerve passes across the palm, it lies in a fibrous tunnel formed between the hook of the hamate and the pisiform (Guyon's canal).

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

References

  1. (2005). "Gray's anatomy: the anatomical basis of clinical practice". Elsevier Churchill Livingstone.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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