Abstract: This paper is asystematic review of the results of more than 10 years'study in this topic. Chief results are as follws: 1. Acupuncture heightens not only the pain threshold but also thre-sholds of two-point discrimination sensation. The difference is statisticallysignificant. 2. When the point of Hegu and Sanyinjiao are stimulated by acupu-ncture, both 25 min. and 15 min acupuncture give about the same height-ening efficacy for the two-point threshold. The results of 5 min. acupun-cture temain the least desirable. 3. The factors influencing the heightening of two-point discriminationsensation by acupuncture were established. 4. There is a positive correlation between pain and two-point threshold.The effect of needling on the heightening of two-point threshold correlatesclosely with the efficacy of acupuncture anaesthesia.

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