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an shi yin su zai zhen zuo zhen tong zhong de zuo yong
Author(s): 
Pages: 121-128
Year: Issue:  2
Journal: Acupuncture Research

Keyword:  实验组痛觉诱发电位脑诱发电位信号检测论针刺镇痛痛刺激心理因素镇痛效应弹簧针镇痛效果;
Abstract: The experiment was a further study to evaluate the role of suggestive factor in acupuncture anal-gesia, using cerebral potentials evokad by pain stimulation as the index of pain. It was also for theexploration of the effect of SDT method applied to pain study. Among 38 normal healthy volunteer adults, 30 in experimental group were evenly divided intopositive and negative suggestive subgroups, and 8 served as the control. Word induction suggestionmethod was employed. The results indicated: 1) After acupuncture, significantly inhibited were theP_(200) amplitude of the evoked potential (P.02 ), verbal report of heavy pain (P.10), uncomfort-able feeling of the pain (P.005); significatly elevated were the pain threshold and pain toleranceto spring pinch (both P.001). The change of verbal report of heavy pain tolerance to spring pinchwere both signifcantly correlated with the change of the P_(200) amplitude. After rest, the control groupbad no clear change in above mentioned indices. 2) On any of the above indexes, there was no signi-ficant difference between the positive and negative suggestive groups. It suggests that the suggestionfactor plays no significant role in acupuncture analgesia. The Sensory Decision Theory (SDT) analysis indicated that, after acupuncture, the sensual discha-mination (d') of most Ss (21/30) decreased, though not significantly (P.10), but the criterion ofpain teport was not changed. The change of d' was somewhat correlated with the P_(200) eamplitude ofevoked potential (P.10), with the d' decreased Ss being most of the P_(200) amplitude inhibited. Theproblem with regard to the application of SDT method to pain research was discussed.
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