Maksimova E V, Maksimova L N
Zh Vyssh Nerv Deiat Im I P Pavlova. 1976 May-Jun;26(3):598-604.
A laminar analysis of visual evoked potentials recorded from the cortical striate zone in response to stimulation of the optic nerve was made on the cats foeti in the second half of antenatal development and on kittens in the first few days of their life. In all the investigated terms of prenatal ontogenesis, two negativity foci are distinctly revealed in the specific zones of the visual cortex. The first appears with the least latency in the middle cortical layers after an afferent volley inflow to the cortex. The second, which reaches a maximum in 40 to 50 msec appears in the superficial cortical structures. Analysis of the data obtained shows that the first excitation focus is due to the summation of EPSP in the neural elements of the middle cortical layers, while the second is caused by development of depolarization in the apical dendrites of the pyramidal neurones.
对处于产前发育后半期的猫胎儿以及出生后最初几天的小猫，在刺激视神经时从视皮层纹状区记录的视觉诱发电位进行了分层分析。在产前个体发育的所有研究阶段，在视皮层的特定区域明显发现两个负电位焦点。第一个在传入冲动流入皮层后，在皮层中层以最短潜伏期出现。第二个在40至50毫秒达到最大值，出现在皮层浅表结构中。对所获数据的分析表明，第一个兴奋焦点是由于皮层中层神经元件中兴奋性突触后电位（EPSP）的总和，而第二个是由锥体神经元顶端树突去极化的发展引起的。
