Maksimova E V, Maksimova L N
Zh Vyssh Nerv Deiat Im I P Pavlova. 1976 Mar-Apr;26(2):390-6.
Development of the perceiving function of the visual cortex was studied on the foeti of cats in the second stage of antenatal development with intact placental blood circulation. It has been found that functional maturing of the cortical end of the visual analyser starts at the beginning of the second half of antenatal life. At this period EPs to stimulation of the optic nerve are recorded throughout the dorsal cortex of the contralateral hemisphere. At first they appear as slow three-phase (positive-negative-positive) oscillations of a small amplitude. As the foetus develops, the EP amplitude increases, and the EP configuration in the striate zone of the cortex becomes complex. Two weaks before birth, a short-latency negative wave appears against the background of the primary positive oscillation. In the last week of antenatal development of the foeti and in the first few days of the kittens life, EPs are represented in the specific zone of the visual cortex (g. lateralis) as two negative oscillations, and in the so-called associative zone (the middle part of the suprasylvian gyrus) by one long-latency high-amplitude negative oscillation which corresponds by latency to the second negative EP component in the striate cortex.
在产前发育第二阶段且胎盘血液循环正常的猫胎儿身上，研究了视觉皮层感知功能的发育情况。研究发现，视觉分析器皮质端的功能成熟始于产前生命后半期之初。在此期间，在对侧半球的整个背侧皮层可记录到对视神经刺激的诱发电位（EP）。起初，它们表现为小幅度的缓慢三相（正-负-正）振荡。随着胎儿的发育，EP幅度增大，皮层纹状区的EP波形变得复杂。出生前两周，在初级正性振荡的背景上出现一个短潜伏期负波。在胎儿产前发育的最后一周以及小猫出生后的头几天，视觉皮层特定区域（外侧沟）的EP表现为两个负性振荡，而在所谓的联合区（上薛氏回中部）则表现为一个长潜伏期高幅度负性振荡，其潜伏期与纹状皮层中第二个负性EP成分相对应。
