Val'tsev B V
Zh Vyssh Nerv Deiat Im I P Pavlova. 1981 May-Jun;31(3):598-604.
The influence of prolonged light stimulation on different parts of the visual analyser was studied in cats. An immense complexity of the adaptation process has been revealed as manifested in a great number of varied parallel processes in the hierarchic structure of the analyser. It has been shown that adaptative reorganization in the distal parts of the retina is directed towards regulation of general sensitivity; in the optic tract and LGB -- towards diminishing dependence of cortical processes on the fluctuations of the illumination level; predominance of inhibitory processes in the cortex characterizes the increasing complexity of cortical processes. The preservation of high efficiency of the visual system in different conditions of background illumination is also due to reciprocal change in temporal characteristics of the on- and off-system and to the shift of the main mechanism of psychophysical reactions from the level of receptor -- horizontal cell to that of bipolars. The hypothesis is corroborated the reorganization of electrical activity expresses not only a change a sensitivity, but also adaptation to many parameters which characterize the transition from darkness to light.
在猫身上研究了长时间光刺激对视觉分析器不同部位的影响。已揭示出适应过程极其复杂，表现为分析器层次结构中大量不同的并行过程。研究表明，视网膜远端部分的适应性重组旨在调节总体敏感度；在视束和外侧膝状体中——旨在减少皮质过程对照明水平波动的依赖性；皮质中抑制性过程占主导地位表明皮质过程的复杂性增加。视觉系统在不同背景照明条件下保持高效，还归因于开-关系统时间特性的相互变化以及心理物理反应的主要机制从感受器-水平细胞水平转移到双极细胞水平。该假设得到了证实，即电活动的重组不仅表示敏感度的变化，还表示对许多表征从黑暗到光明转变的参数的适应。
