| Normal Data of Somatosensory Evoked Potential by Posterior Tibial Nerve Stimulation. |
| Seung Heon Kim, Young Jin Lim, Tae Sung Kim, Gook Ki Kim, Bong Arm Rhee, Won Leem |
| Department of Neurosurgery, College of Medicine, Kyung Hee University, Seoul, Korea. |
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| ABSTRACT |
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This study was undertaken to obtain the normal somatosensory evoked potential pattern from stimulation of the posterior tibial nerve in order to provide basic data for clinical use in diagnosis and management of patients with brain and spinal cord lesions. Thirty-six patients, free of neurological disease and 14 volunteers were tested with 4-Channel Nicolet CA 1000 Clinical Averager. There were 26 male and 24 female, ranging in height from 156 to 178 centimeter, with a mean height of 165.2 centimeter. The results were as follows: 1) All lumbar waves(LP1, LN1) and early cortical waves(P1, N1, P2, N2) were easily identified in all of normal subjects, but P3 was obtaind in 52% of them. 2) Mean latency of each wave was P1(38.10msec.+/-2.23), N1(47.04msec.+/-2.18), P2(N59.98msec.+/-2.97), N2(76.48msec.+/-4.97), LP1(17.99msec.+/-1.75) and LN1(20.72msec.+/-1.53). 3) There was significant correlations between height of individuals and latency of the P1 and LP1. 4) Conduction time between LN1and P1 was 16.55msec. (1.03 and mean latency of left to right difference was 0.23msec.+/-0.19. |
| Key Words:
SSEP; Posterior tibial nerve; Cortical wave; Lumbar wave |
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