Abstract

The study was designed to investigate the role of asymmetric prenatal visual stimulation on the activation of caudomedial mesopallium (CMM) neurons in nine-day-old pied flycatcher nestlings during auditory-guided freezing. Four groups of nestlings were studied: groups 1 and 2 included nestlings with normal vision and visually deprived, respectively, that were incubated and hatched in normal light environment; groups 3 and 4, nestlings with normal vision and visually deprived, respectively, that were incubated and hatched in the dark. The eyes of visually deprived nestlings were covered with non-transparent cups 2 h before the experiment. C-Fos expression was studied. It was shown that densities of neurons activated during freezing response differed in right vs. left CMM only in the group of visually deprived nestlings incubated under light. This suggests that the presence or absence of the asymmetric embryonic visual afferentation may result in the development of different strategies of the visual system integration into defense behavior.

中文翻译：

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自然不对称胚胎视觉传入对中皮雏鸟冷冻反应过程中尾内侧中皮神经元激活的影响

摘要

该研究旨在研究非对称产前视觉刺激对 9 天大的花斑捕蝇器雏鸟在听觉引导冷冻过程中对尾内侧中层 (CMM) 神经元激活的作用。研究了四组雏鸟：第1组和第2组分别包括在正常光照环境下孵化和孵化的视力正常和视力丧失的雏鸟；第 3 组和第 4 组分别是视力正常和视力受损的雏鸟，它们在黑暗中孵化和孵化。实验前 2 小时用不透明的杯子盖住视力丧失的雏鸟的眼睛。研究了 C-Fos 表达。结果表明，在冷冻反应期间激活的神经元密度在右侧和左侧 CMM 中仅在光照下孵化的视觉剥夺雏鸟组中有所不同。