[Effects of the stimulating point and non-point on human cerebral evoked potential and spinal cord evoked potential]

The experiments were carried out on 36 normal subjects. Pain stimulation points are at Neiguan or Hegu and pain stimulation nonpoints are nearby Neiguan or Hegu. The Record locations are at cortex and cervical vertebrae. The feature of evoked cerebral potential (ECP) and spinal cord evoked potential (ESP) by pain stimulation the points or non-points were studied. The results have been obtained. 1. Pain stimulation point ECP generally consists of wave P1, N1, P2, N2, P3, N3, P4 and N4. There is a certain amplitude and latency of each wave. 2. The elements of pain stimulation non-point ECP are Similar to point ECP in the feature. Comparing Pain stimulation Point ECP with non-point ECP, the amplitude of wave P3-N3 of stimulation point ECP increases (P < 0.05). 3. Pain stimulation Point ESP and non-point ESP consist of wave P1, N1 and P2, N3. Comparing Pain stimulation point with non-point there are no significant changes in the amplitude and the latency of ESP.