Dorsal cutaneous ulnar nerve conduction should be useful in identifying distal ulnar lesion, especially those within the forearm or wrist. The purpose of this paper was to estabilish conduction technique and determine normal values of the dorsal cutaneous ulnar nerve conduction in Korean. Fifty five normal adults (30 males, 27 females), mean age 34.8 years-old (from 15 to 60), were examed. Surface recording electrode was placed at the dorsum of the base of the 5th metacarpal bone. The nerve is stimulated at each 8cm, 10cm, 12cm, 14cm above the recording electrode between the flexor carpi ulnaris and the ulnar. The result as follow: 1) The mean values of distal latency were 1.76±0.13 msec in 8cm, 2.06±0.15 msec in 10cm, 2.42±0.16 msec in 12cm, 2.73±0.14 msec in 14cm above the recording electrode. 2) The difference of distal latencies between right and left side was less than 0.26 msec normally (95% confidence interval). 3) The mean values of amplitudes were 41.90±0.10㎶ in 8cm, 39.53±8.27㎶ in 10cm, 34.97±8.17㎶ in 12cm, 30.53±7.46㎶ in 14cm above the recording electrode. 4) The longer in stimulating distances, the more decreased in amplitude, prominently in 12cm above the recording electrode with statistical significance. So, the most useful electrical stimulation is to do at 8cm and 10cm above the recording electrode on dorsal cutaneous ulnar nerve conduction in Korean. |