PMID: 2125861Jan 1, 1990Paper

The effects of needling acupoint, nonpain and pain stimulation on electroencephalogram (EEG) of somatosensory area analysed by computer

Zhen ci yan jiu = Acupuncture research
K HuangJ Zhang

Abstract

The present study was to observe the change of EEG power spectrum during acupuncturing, nonpain stimulating and pain stimulating; then to comparatively analyse the effects of acupuncturing acupoint on brain function. The work was performed on 30 normal subjects. Nonpain or pain stimulation was applied to a medial finger, and the intensity of stimulation was determined by subject's report. Acupoints were "Neiguan" and "Jianshi". EEGs were recorded on a tape recorder before, during and after each stimulation. Then EEG power spectrum were analysed by SM-2100 computer. The results were as follows: According to the analysis of EEG power spectrum, in most of subjects, alpha (a) band was shifted to higher band during pain stimulating, there was significant change, P less than 0.05. The highness of a spike was significantly increased during acupuncturing acupoints, P less than 0.02. The ratio of delta power spectra to theta (theta) and delta (delta) power spectra showed increased tendency during acupuncturing or nonpain stimulating, but decreased during pain stimulating. It was indicated that nociceptive pain-stimulation resulted in hyposynchrony of EEG: frequency was increased, amplitude was decreased, alpha rhythm was inhibited to a ...Continue Reading

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