自从我国开展针麻原理研究以来

以躯体感觉诱发电为指标在人体上探讨针刺的镇痛作用已有许多报导。我们过去工作中曾观察到痛刺激一侧中指在对侧头皮相应点皮层感觉区引出的大脑诱发电的某些成分与疼痛关系较密切

且与主诉疼痛有较好的平行关系

国外也有类似报This investigation was performed on 45 healthy adults. Two kinds of stimulation intensity(Ⅰ_1

Ⅰ_2)were applied on fingers. According to the signal decision theory

subjects were requested to differentiate four categories of pain perception from the above mentioned stimuli: "slight pain"

"moderate pain"

"pain"

"heavy pain". Cerebral evoked potentials were averaged by means of a computer and the relationship between cerebral evoked potentials and pain rating was analyzed. Pain tolerance by spring pinch was also observed. The preliminary results were as follows: 1. Some parallel relationship exists between the amplitude of evoked potential

the intensity of stimulation and the pain rating. 2. There is a tendency of positive correlation between the difference of amplitude P_1 evoked by Ⅰ_1 and Ⅰ_2 and the difference of the number of heavy pain ratings. 3. No positive correlation has been observed between the difference of amplitude and the d' and Lx.