Annals of Clinical Neurophysiology

The Korean Society of Clinical Neurophysiology (대한임상신경생리학회)
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Do N37 and P37 Potentials Have Different Generators in Somatosensory Evoked Potential? - Analysis Using Gating Mechanism -

체성감각 유발전위에서 N37과 P37은 다른 발생기를 가지고 있는가? - gating 현상을 이용한 분석 -

  • Park, Young Seok (Department of Neurology, College of Medicine, Dong-A University) ;
  • Cha, Jae Kwan (Department of Neurology, College of Medicine, Dong-A University) ;
  • Kim, Sang Ho (Department of Neurology, College of Medicine, Dong-A University) ;
  • Kim, Jae Woo (Department of Neurology, College of Medicine, Dong-A University)
  • 박영석 (동아대학교 의과대학 신경과학교실) ;
  • 차재관 (동아대학교 의과대학 신경과학교실) ;
  • 김상호 (동아대학교 의과대학 신경과학교실) ;
  • 김재우 (동아대학교 의과대학 신경과학교실)
  • Published : 1999.11.30
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Abstract

Backgroud : The generators of N37 and P37 of posterior tibial nerve somatosensory evoked potential(PTSEP) have not been exactly known. Recently, some reports suggested that P37 and N37 might have different generator. We conducted a study to know the generators of P37 and N37 of PTSEP using gating mechanism. Methods : We evaluated subcortical and cortical somatosensoy evoked potentials(SEPs) in response to posterior tibial nerve stimulation in 3 experimental conditions of foot movement and compared them with PTSEPs in full relaxation of foot. The experimental conditions were: (a) active flexion-extention of stimulated foot, (b) isometric contraction of the stimulated foot, (c) passive flexion-extention of the stimulate foot. We analyzed the latencies and amplitudes of following potentials; P30, N37, P37, and N50. Results : The amplitude of P30 potential did not change during at any paradigms. The amplitudes of P37 and N50 were significantly attenuated in all condition. However, the amplitude of N37 showed no significant change during at any paradigms. Conclusions : These results suggest that the generators of P37 and N37 of PTSEP be different in cortex.

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