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Dorsal Branch of Ulnar Nerve
Nervous System

Dorsal Branch of Ulnar Nerve

Ramus dorsalis nervi ulnaris

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Origin

The dorsal branch arises from the main trunk of the ulnar nerve about 5 cm above the radiocarpal (wrist) joint. It contains sensory nerve fibers for the C8-T1 spinal segments.

Course

The dorsal branch of ulnar nerve descends with the main trunk of ulnar nerve almost to the pisiform bone. Here it passes backwards to divide into three (and sometimes two) dorsal digital nerves.

Branches

The dorsal branch of ulnar nerve gives rise to three dorsal digital nerves.

Supplied Structures

The dorsal digital nerves (from the dorsal branch) provide cutaneous innervation to the skin of the medial half of the back of hand and the skin of the dorsal aspect of the medial two and half fingers. Note that the terminal parts of the dorsal aspect of the digits are supplied by the median nerve.

Learn more about this topic from other Elsevier products

Ulnar Nerve

ScienceDirect image

The ulnar nerve (and accompanying artery) pass deep to the volar ligament before branching into the deep and superficial branches.

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