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Journal of the Korean Academy of Rehabilitation Medicine 1993;17(4):557-562.
Median and ulnar motor and sensory conduction studies in the same normal subjects.
Shin, Jung Bin , Park, Yoon Ghill , Chun, Sae Il
Department of Rehabilitation Medicine, Yonsei University College of Medicine
정상인의 정중신경 및 척골신경 전도검사의 비교
신정빈, 박윤길, 전세일
연세대학교 의과대학 재활의학교실

Motor and sensory nerve action potentials of the median and ulnar nerves were studied in 50 normal subjects. The distal latency, amplitude and area were compared between the two nerves of the same healthy subject. Regarding motor conduction study, the distal latency and amplitude ratio of the median to ulnar nerve were 1.26 and 1.03, respectively.

The amplitude and area of the median sensory nerve action potentials were significantly larger than those of the ulnar nerve, and the distal latency and amplitude ratio of the median to ulnar sensory action potential were 0.98 and 1.23, respectively. The difference of the sensory distal latency was -0.06msec.

A comparison of the parameters between median and ulnar nerve conduction study can be used in the diagnosis of the carpal tunnel syndrome and is particulary useful in those patients who show normal median motor and sensory latency.

Key Words: Median nerve, Ulnar nerve, Nerve conduction study, Ratio, Difference


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