Mikhaĭlova N G
Zh Vyssh Nerv Deiat Im I P Pavlova. 1982 Jan-Feb;32(1):63-71.
The following two types of reaction are exhibited by self-stimulating rats following a transition from the regimen of preference (free) to that of fixed series of stimuli: I. increased frequency of pressings with simultaneous shortening of their duration, approaching the duration of fixed series; II. reduced frequency of pressings with their longer duration. Of the two studied hypothalamic areas, the former type of reaction is exhibited predominantly in the self-stimulation points located in the lateral hypothalamic area, while the latter type - in the lateral preoptic area. Different strategy of the animals' behaviour observed during the change of reinforcement routines is discussed with regard to different levels of integration of emotionally-positive mechanisms of brain structures of phylogenetically different age.
从偏好（自由）模式转变为固定刺激序列模式后，自我刺激的大鼠会表现出以下两种反应类型：I. 按压频率增加，同时持续时间缩短，接近固定序列的持续时间；II. 按压频率降低，持续时间延长。在研究的两个下丘脑区域中，前一种反应类型主要出现在位于下丘脑外侧区域的自我刺激点，而后一种反应类型则出现在视前外侧区域。针对系统发育不同年龄的脑结构中情绪积极机制的不同整合水平，讨论了强化程序改变期间观察到的动物行为的不同策略。
