Maksimova L N, Maksimova E V
Zh Vyssh Nerv Deiat Im I P Pavlova. 1979 Jan-Feb;29(1):117-25.
Characteristics of EPs in different areas of the visual cortex elicited by stimulation of subcortical nuclei (LGB, posterior thalamic nuclei and superior colliculi) were studied in cat's fetuses during the last 10 days of their antenatal development. It was shown that both in the striate and in accessory visual areas the EPs are negative oscillations with a small initial positivity. Latencies of the EPs to stimulation of the thalamic nuclei make from 18 to 25 msec in different cortical areas and those to the stimulation of the superior colliculi--from 40 to 45 msec. Laminar analysis of EPs elicited in the occipital cortical area by the stimulation of LGB revealed two foci of depolarization; the one with shorter EP latency is localized in the depth of the cortex. The role of the extrageniculate ascending system and of different groups of fibers of the geniculocortical system in the formation of the main EP components in the visual cortex in early ontogenesis is discussed.
在猫胎儿产前发育的最后10天，研究了刺激皮层下核（外侧膝状体、丘脑后核和上丘）所诱发的视皮层不同区域的诱发电位（EP）特征。结果表明，在纹状区和辅助视区，EP均为初始有小的正性波的负性振荡。在不同皮层区域，刺激丘脑核诱发EP的潜伏期为18至25毫秒，刺激上丘诱发EP的潜伏期为40至45毫秒。对刺激外侧膝状体在枕叶皮层区域诱发的EP进行层分析，发现两个去极化焦点；潜伏期较短的一个位于皮层深部。讨论了外膝状体上升系统和膝状体皮层系统不同纤维群在早期个体发育中视皮层主要EP成分形成中的作用。
