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Journal of the Korean Academy of Rehabilitation Medicine 1998;22(3):637-641.
Segmental Ulnar Nerve Conduction Studies According to Elbow Position in Normal Subjects.
Kim, Han Chel , Lee, Mi Hee , Woo, Bong Sik , Lee, Chang Hoon , Kim, Ji Hoon
Department of Rehabilitation Medicine, Seoul Red Cross Hospital.
정상 성인에서 주관절 위치에 따른 분절별 척골신경 전도검사
김한철, 이미희, 우봉식, 이창훈, 김지훈
서울적십자병원 재활의학과

Objectives: The current literature gives confusing advice on the position of the elbow in ulnar nerve conduction study. The purpose of this study was to determine the appropriate position of elbow flexion for a segmental ulnar nerve conduction study and to attain the basic information for an evaluation of ulnar neuropathy.

Segmental ulnar motor and sensory nerve conduction studies were performed bilaterally on 40 healthy korean adults(20 men and 20 women) with the age range from 19 to 56 years(mean age:29.86). The ulnar nerve was stimulated at 7 cm & 10 cm proximal to the active recording electrode respectively and 5 cm distal, and poximal to the medial epicondyle of the humerus for motor and sensory nerves at each elbow flexion position of 0o, 45o, 90o, and 135o. The segmental distances were measured in each position.

The segmental nerve conduction velocity(NCV) of the elbow segment increased with the degree of elbow flexion, and it was faster than the forearm segment at 90o and 135o of elbow flexion. The NCV showed no statistical difference in each elbow position.

We conclude that the degree of elbow flexion should be maintained 90o or above in an ulnar nerve conduction study.

Key Words: Ulnar nerve, Nerve conduction study, Optimal elbow angle


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