The sensory nerve studies are particularly helpful in the evaluation of polyneuropathies such as compression syndrome due to vigorous upper extremity exercise, lateral epicondylitis, cervical radiculopathy, brachial plexopathy, median nerve compression, and ruptured biceps muscle or tendon.
Especially, in brachial plexus injuries, sensory nerve conduction studies may be helpful in characterizing a lesion as preganglionic or postganglionic.
To obtain the standard of sensory conduction velocities, distal latencies. and amplitude of the lateral cutaneous nerve of forearm in healthy Korean, the antidromic techniques, developed by Spindler and Felsenthal, were applied to 51 Koreans(28 female and 23 female) with no history or physical finding of neurological diseases.
The subjects ranged in age from 19 to 62 years with a mean age of 34.9.
The results were summarized as follows:
1) A total of 80 lateral cutaneous nerve of forearm was studied and the mean value of conduction velocity was 66.90±4.26 m/sec, that (:f its distal latency was 1.81±0.13 msec, and that of amplitude was 28.08±11.90 uv
2) There was significant difference in the conduction velocity between male and female (male: 65.52±4.29, female: 68.16±3.32, P<0.005)
3) There was significant difference in the distal latency between male and female(male: 1.86±0.14, female: 1. 77±0. 10, p<0.005)
4) Statistically not significant were the distal latency, conduction velocity and amplitude with advancing age
5) There was no significant difference related to the dominance of the extremities.
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