Shevelev I A, Sharaev G A, Voglushev M A, Pyshnyĭ M F, Verderevskaia N N
Neirofiziologiia. 1982;14(6):622-30.
The dynamics of receptive fields of the visual cortex and lateral geniculate neurons were investigated in acute experiments on unanesthetized immobilized cats. For this purpose a computer presented small local flashes in a random order to 100 points of the receptive field and changes in three-dimensional relief of activity within the field were evaluated every 20 ms. Regular dynamic reorganizations of registered receptive fields of all investigated neurons were observed both after switching on and off the light stimulus. After the latency a small region of weak responses appeared in the centre of field. Later on the recorded field enlarged gradually, reaching maximal size at 60-100 ms, and after that began to narrow and disappeared or fell to pieces. The central inhibitory zone of the field had the same dynamics. If the neuron responded to stimulation by generating two bursts of spikes, during the second one the receptive field changed in the same way. The effect was revealed under various conditions of light stimulation. Functional significance of these effects for orientational information coding by visual cortex neurons is discussed.
在对未麻醉的固定猫进行的急性实验中，研究了视觉皮层和外侧膝状神经元感受野的动态变化。为此，计算机以随机顺序向感受野的100个点呈现小的局部闪光，并每20毫秒评估一次视野内活动的三维起伏变化。在打开和关闭光刺激后，均观察到所有被研究神经元的记录感受野有规律的动态重组。在潜伏期后，视野中心出现一个弱反应的小区域。随后记录的视野逐渐扩大，在60 - 100毫秒时达到最大尺寸，之后开始缩小并消失或破碎。视野的中央抑制区具有相同的动态变化。如果神经元通过产生两串尖峰对刺激做出反应，在第二串尖峰期间，感受野以相同方式变化。在各种光刺激条件下均揭示了这种效应。讨论了这些效应对于视觉皮层神经元编码方向信息的功能意义。
