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Journal of the Korean Academy of Rehabilitation Medicine 1996;20(3):2.
Dorsal Cutaneous Branch of Ulnar Nerve An Anatomic Study by Cadaver Dissection
Eun Ha Lee M.D., Hang Jae Lee, M.D., Hee Kyu Kwon, M.D. , Hye Jung Hong, M.D.*
Department of Rehabilitation Medicine, College of Medicine, Korea University, *Department of Rehabilitation Treatment, Hanseo University
배부 척골 신경 분지의 해부학적 연구
이은하, 이항재, 권희규, 홍혜정*
고려대학교 의과대학 재활의학교실 및 한서대학교 재활치료과*
Abstract

The branching sites of dorsal cutaneous branch of the ulnar nerve (DCBUN) from the ulnar nerve proper in the forearm have been described. To demonstrate the precise branching point, we dissected 28 upper extremities of 14 cadavers. The mean value of this point proximal to the styloid process was 87mm: The mean value of the fascicular separation was 217mm. We also confirmed that DCBUN is positioned more either toward medial epicondyle or olecranon to the ulnar nerve proper in the ulnar groove. DCBUN with this anatomic arrangement at the elbow may be less vulnerable to injury or compression than the fascicles of ulnar nerve proper which innervate the palm side of medial two digits and the hand intrinsic muscles. Therefore, understanding the anatomy of DCBUN may be helpful in the electrodiagnostic and surgical procedures: 1, This sensory branch may be used as a donor on an anastomosis of other nerve injuries; 2, Iatrogenic injury of this nerve due to diagnostic and surgical procedures such as arthroscopy at the wrist is preventable.

Key Words: Ulnar nerve, Anatomy, Electromyography, Compression neuropathy


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