针刺对家兔大脑皮层诱发电位的影响

THE INFLUENCES OF ACUPUNCTURE ON THE CORTICAL EVOKED POTENTIALS IN RABBITS

本实验在31只乌拉坦麻醉或清醒家兔身上观察了针刺对视觉、听觉和体觉脑发电位及原脑电的影响,并分析了诱发电位与原脑电的关系。结果表明,针刺对各诱发电位波幅有显著的抑制作用,同时动物出现轻度激醒行为,原脑电呈去同步化,总积分与慢波频带功率减少,后二项与诱发电位主要成分波幅呈正相关。因此,不能排除针刺对诱发电位波幅的影响是原脑电变化的间接结果,针刺时诱发电位的抑制并不意味着皮层处于抑制状态。

In this work the visual,auditory,somatosensory evoked cortical potentialsas well as raw EEGs were observed in 31 rabbits either anesthetized with ure-thane or conscious.The effects of acupuncture on them were as follows:1)The main compon(?)nts of the evoked potentials were significantly depressed;2)The raw EEGs were desynchronized while the animals appeared to be slightlyactivated;3) Both the integral values of raw EEGs and the powers of lowerfrepuency waves (1-3.99Hz) were decreased and positively correlated well withthe amplitudes of the main components of the evoked potentials.Therefore,Itcould not be ruled out that the effects of acupuncture on the evoked potentialsare secondary to the changes of EEGs,and it is suggested that the inhibition ofevoked potentials during acupuncture does not necessarily mean that the cerebralcortex is in an inhibitory state.