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Palmar Branch of Ulnar Nerve
Nervous System

Palmar Branch of Ulnar Nerve

Ramus palmaris nervi ulnaris

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Origin

The palmar branch of ulnar nerve arises from the main trunk of the nerve proximal to the flexor retinaculum. It contains nerve fibers which relay sensory information to the C8, T1 cervical and thoracic segments of the spinal cord.

Course

Following its origin from the ulnar nerve in the forearm, the palmar cutaneous branch descends along with the main nerve trunk. It crosses over the flexor retinaculum to reach the skin over the hypothenar eminence (medial palmar region) (Engber and Gmeiner, 1980).

Branches

There are no named branches.

Supplied Structures

The palmar branch of the ulnar nerve provides cutaneous innervation to the medial palm (over the hypothenar eminence).

References

Engber, W. D. and Gmeiner, J. G. (1980) 'Palmar cutaneous branch of the ulnar nerve', J Hand Surg Am, 5(1), pp. 26-9.

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