Litvinov E G, Logunov D B
Zh Vyssh Nerv Deiat Im I P Pavlova. 1979 Mar-Apr;29(2):284-94.
The procedure of elaboration of conditioned defensive pneumostomum closure was reproduced in neurophysiological experiments on half-intact preparation of the snail. Activity of identified command neurones involved in the reinforcing unconditioned reflex, was recorded intracellularly. Conditioned and unconditioned stimuli converged on these neurones. Excitability of the explored command neurones increased during the first stages of conditioning. Appearance and consequent intensification of the initially absent spike response to the conditioned stimulus was essentially due to this excitability change. Command neurones action potentials evoked by the conditioned stimulus elicited some effector reactions which were the first signs of conditioning. The conclusion is made that the excitability changes in certain nerve cells are essential for determining the initial phase of conditioning.
在蜗牛半离体标本的神经生理学实验中，重现了条件性防御性呼吸孔关闭的形成过程。对参与强化非条件反射的已识别指令神经元的活动进行了细胞内记录。条件刺激和非条件刺激都作用于这些神经元。在条件反射形成的最初阶段，所研究的指令神经元的兴奋性增加。对条件刺激最初不存在的峰电位反应的出现及随后的增强，主要是由于这种兴奋性变化。由条件刺激诱发的指令神经元动作电位引发了一些效应反应，这些反应是条件反射的最初迹象。得出的结论是，某些神经细胞的兴奋性变化对于确定条件反射的初始阶段至关重要。
