针刺穴位及非痛、痛刺激对体感区自发脑电影响的计算机分析

<正> 脑波的性质非常大的程度取决于大脑皮层的活动程度,脑电活动情况常作为脑皮层机能状态的一个指标。已有研究用脑电图作为客观指标来量度由电刺激牙齿引起的疼痛以估价镇痛的程度。随着计算机在生物医

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

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 certain extent; acupuncturing acupoints had the effect which could strengthen the stability of EEG rhythmic activities. We know that EEG rhythmic activities show clearly the stability of balance inside organism. So this result suggested that acupuncturing acupoint could play a role in modulating the balance inside organism and enhancing the stability of brain function.