Segmental and Dermatomal Somatosensory Evoked Potentials in ?Lumbosacral Radiculopathy

J Korean Neurol Assoc > Volume 13(3); 1995 > Article

Journal of the Korean Neurological Association 1995;13(3): 519-527.

요천골 신경근병증에서 피부분절성 및 구역성 체감각 유발전위검사의 ?유용성

손성일, 임정근, 이상도, 박영춘

계명대학교 신경과

Segmental and Dermatomal Somatosensory Evoked Potentials in ?Lumbosacral Radiculopathy

Sung Il Shon, M.D., Jeong Geun Lim, M.D., Sang Doe Lee, M.D., Young Choon Park, M.D.

Department of Neurology, Keimyung University School of Medicne

Abstract

This study was performed to evaluate the usefulness of dermatomal somatosensory evoked potentials(D-SSEP) and segrnental somatosensory evoked potentials(S-SSEP) for the diagnosis of lurnbosacral radiculopathy. D-SSEP and S-SSEP were recorded from 30 healthy controls and 16 patients with lumbosacral radiculopathy(LA radiculopathy: 10 cases, L5: 13 cases, SI: 4 cases) who was diagnosed by clinical findings CT and/or MRI. D-SSEP were abnormal in 40%, 30.7% and 25% of the patients with IA, L5 and Sl radiculopathy respectively and S-SSEP were abnormal in 20%, 38% and 50% of the patients with IA, L5 and Sl radiculopathy respectively. The proportion of abnormal findings in the' patients with L4, L5 and Sl radiculopathy was increased to 50%, 46. 1% and 50% respectively by administering both of D-SSEP and S-SSEP. In conclusion, D-SSEP and S-SSEP are simple and noninvasive test but insensitive studies for diagnosis of lumbosacral radiculopathy. The diagnostic sensitivity could be increased by usmg both of these two studies.