Pavlygina R A
Acta Neurobiol Exp (Wars). 1974;34(3):353-66.
The closure of a simple form of temporary connection of the summation reflex type was studied by combining light flashes with subthreshold electrical stimulation of the cortical site of representation of the right forelimb in the cat. Summation, i.e., forepaw flexion, occurred both when two subthreshold stimuli were applied simultaneously and when there was a short (tens of milliseconds) interval between the stimuli. The sequence of stimulus presentation (current + light or light + current) was immaterial. During summation there occurred changes in the configuration of the direct cortical response recorded at a distance of 2-3 mm from the stimulation site. Neurophysiological analysis of the electrical correlates of establishment of the simple form of temporary connection (study of neuronal activity, the effect of some pharmacological agents, testing by paired stimuli) suggests that the mechanism of closure under study is dependent on induction relations manifested by the enhancement of phasic changes in excitatory 2nd inhibitory processes. When the current + light combination was used, two phases of neural activity were characteristic: inhibition and a subsequent rebound. With the light + current combination, these phases were preceded by a phase of primary excitation.
通过将闪光与对猫右前肢皮层代表区进行阈下电刺激相结合，研究了简单形式的总和反射型临时连接的闭合情况。当同时施加两个阈下刺激以及当刺激之间存在短（几十毫秒）间隔时，都会出现总和现象，即前爪屈曲。刺激呈现的顺序（电流 + 光或光 + 电流）无关紧要。在总和过程中，在距刺激部位2 - 3毫米处记录的直接皮层反应的构型发生了变化。对简单形式的临时连接建立的电相关物进行神经生理学分析（研究神经元活动、某些药物的作用、成对刺激测试）表明，所研究的闭合机制依赖于由兴奋性第二抑制过程中的相位变化增强所表现出的诱导关系。当使用电流 + 光组合时，神经活动有两个特征阶段：抑制和随后的反弹。使用光 + 电流组合时，这些阶段之前有一个初级兴奋阶段。
