Palmar branch of ulnar nerve - Upper extremity - Peripheral nervous system - e-Anatomy
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Palmar branch of ulnar nerve

Ramus palmaris nervi ulnaris

  • Synonym: Palmar cutaneous branch of ulnar nerve
  • Related terms: Palmar branch; Palmar branch (Ulnar nerve)

Definition

Muhammad A. Javaid

The palmar branch of ulnar nerve, also known as the palmar cutaneous branch, is one of its cutaneous branches originating in the forearm.

Origin and Pathway

The palmar cutaneous branch arises approximately 5 cm above the wrist. It has a superficial course, passing over the flexor retinaculum to reach the palm.

Innervation

  • The palmar branch provides sensory innervation to the skin over the hypothenar eminence.

  • Additionally, the palmar branch establishes neural communication with the palmar cutaneous branch of the median nerve, contributing to the sensory network of the palm.

References

  • Gray, H. (2016). ‘Chapter 48: Shoulder girdle and arm’ in Gray’s anatomy the anatomical basis of clinical practice. (41st ed.) New York: Elsevier, pp. 832, 863-864.

  • Gray, H. (2016). ‘Chapter 50: Wrist and hand’ in Gray’s anatomy the anatomical basis of clinical practice. (41st ed.) New York: Elsevier, pp. 881-886, 893.

  • Becker RE, Manna B. Anatomy, Shoulder and Upper Limb, Ulnar Nerve. [Updated 2023 Jul 24]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK499892/

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