Skip to main content

Unfortunately we don't fully support your browser. If you have the option to, please upgrade to a newer version or use Mozilla Firefox, Microsoft Edge, Google Chrome, or Safari 14 or newer. If you are unable to, and need support, please send us your feedback.

Elsevier
Publish with us
Superficial Branch of Ulnar Nerve (Right)
Nervous System

Superficial Branch of Ulnar Nerve (Right)

Ramus superficialis nervi ulnaris

Read more

Quick Facts

Origin: Ulnar nerve.

Course: The ulnar nerve crosses over the flexor retinaculum to divide into superficial and deep terminal branches. The superficial branch innervates palmaris brevis and becomes cutaneous to palmar aspect of medial one and half fingers.

Branches: Common Palmar Digital branch of ulnar nerve, muscular branch of ulnar nerve to hypothenar muscles.

Supply: Hypothenar muscles (abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti muscles), palmaris brevis muscle, and skin of palmar aspect of medial one and a half digits.

Complete Anatomy
The world's most advanced 3D anatomy platform
Try it for Free

Origin

The superficial branch arises as one of the two terminal branches of the ulnar nerve at the distal border of the flexor retinaculum.

Course

The ulnar nerve crosses the wrist between the tendons of flexor carpi ulnaris and flexor digitorum superficialis muscles. It divides into superficial and deep terminal branches at the distal border of the flexor retinaculum. The superficial branch supplies palmaris brevis and becomes cutaneous to provide digital branches to medial one and a half digits.

Branches

The superficial branch gives off nerve fibers to the hypothenar muscles and then becomes the common palmar digital nerve. It further subdivides into proper palmar digital nerves for innervating the skin of adjacent sides of the ring and little fingers.

Supplied Structures

The superficial branch of the ulnar nerve provides branches that innervate the hypothenar muscles (abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti muscles), palmaris brevis muscle, and skin of palmar aspect of medial one and a half digits.

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.

Explore on ScienceDirect(opens in new tab/window)

Complete Anatomy

The world's most advanced 3D anatomy platform

Complete Anatomy