Peñaloza-Rojas J H
Departamento de Ciencias Fisiológicas, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá.
Acta Physiol Pharmacol Latinoam. 1990;40(3):319-37.
In a series of experiments in animals and in man several authors have shown that sensory stimulation induces low voltage fast activity in the EEG. The problem to be studied in this work is related to the EEG changes produced by self-stimulation. A group of human subjects were instructed to be self-stimulated with clicks and flashes of light randomly applied by themselves. When the subjects were with the eyes closed and in resting state, alpha rhythm was predominantly recorded in the EEG. However, during acoustic or visual stimulation a low voltage fast activity was predominantly observed in the EEG. In self-administration of the stimulus a low voltage fast activity was recorded in the EEG several seconds before the stimulus application. These results suggest that the activation of a complex neuronal mechanism involved in the volitive response, as well as anxiety and attentive states of the subject occurring before the actual stimulation to select the moment at which the stimulus has to be applied, can be responsible for the blocking of the alpha rhythm previously to the flashes of light and clicks presentation.
在一系列针对动物和人类的实验中，几位作者已经表明，感觉刺激会在脑电图（EEG）中诱发低电压快速活动。本研究要探讨的问题与自我刺激所产生的脑电图变化有关。一组人类受试者被要求自行用随机施加的咔哒声和闪光进行自我刺激。当受试者闭眼处于休息状态时，脑电图中主要记录到α波节律。然而，在听觉或视觉刺激期间，脑电图中主要观察到低电压快速活动。在自我施加刺激时，在刺激施加前几秒脑电图中记录到低电压快速活动。这些结果表明，参与意志反应的复杂神经元机制的激活，以及在实际刺激之前受试者出现的焦虑和专注状态，可能是在闪光和咔哒声呈现之前α波节律被阻断的原因，这些状态会在实际刺激之前选择施加刺激的时刻。
