Superficial Branch of the Ulnar Nerve

Description

Normal anatomy of the median and ulnar nerves. DorBUN dorsal branch of ulnar nerve, DBUN deep branch of ulnar nerve; SSBUN superficial sensory branch of ulnar nerve, CDN common digital nerve; PDN proper digital nerve (Green ulnar and Yellow median), RMN recurrent median nerve, PCBM Palmar cutaneous branch of median nerve (colour figure online)

Name

• Superficial Branch of the Ulnar Nerve
• Superficial Sensory Branch of the Ulnar Nerve
• Superficial Ulnar Nerve
• Palmar Branch of the Ulnar Nerve
• Superficial Terminal Branch of the Ulnar Nerve

General

• Terminal branch of the ulnar nerve

Gross Anatomy

• Arises within Guyons Canal at the distal border of the flexor retinaculum
• Passes into the palm, medial to the ulnar artery

Motor Innervation

• Palmaris Brevis

Sensory Innervation

• Skin on the ulnar side of 4th digit and entire 5th digit

Branches

• Common palmar digital nerve: divides into two palmar digital nerves
  • Supply the volar surfaces of the lateral half of the little finger and medial half of the ring finger
• Proper palmer digital nerve: supplies the volar surface of the medial half of the little finger

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Clinical Significance

• Needs to be updated

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See Also

• Nerve Anatomy Main
• Hand Pain Main
• Physical Exam Hand

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