The Development of the Visual System of the Albino Rat

I. Introduction.- II. Material and Methods.- III. Results.- Day 13 of gestation.- Retina.- Brain stem.- Visual cortex.- Day 15 of gestation.- Retina.- Brain stem.- Visual cortex.- Day 17 of gestation.- Retina.- Colliculus superior.- Corpus geniculatum laterale.- Visual cortex.- Days 18 and 19 of gestation.- Retina.- Corpus geniculatum laterale.- Colliculus superior.- Visual cortex.- Days 20 and 21 of gestation.- Retina.- Corpus geniculatum laterale.- Colliculus superior.- Visual cortex.- Third postnatal day.- Retina.- Corpus geniculatum laterale.- Colliculus superior.- Visual cortex.- Seventh postnatal day.- Retina.- Corpus geniculatum laterale.- Colliculus superior.- Visual cortex.- Tenth postnatal day.- Retina.- Corpus geniculatum laterale.- Colliculus superior.- Visual cortex.- Fourteenth postnatal day.- Retina.- Corpus geniculatum laterale.- Colliculus superior.- Visual cortex.- IV. Discussion.- 1. The ventricular zone in its significance for the cell proliferation and the resulting growth of area and thickness of the immature brain.- a) Proliferation and mitotic cycle.- b) The structure of the ventricular zone (with special consideration of the developmental stages in which the ventricular zone represents almost the whole neural wall).- c) The ultrastructure of the ventricular cells.- d) The behavior of the ventricular zone in different phases of development and different brain regions.- e) Problems of growth of area and thickness of the developing brain.- 2. The histological and cytological differentiation.- a) Cortex occipitalis.- ?) The prenatal neurogenesis and gliogenesis of the cortical layers.- ?) The mechanism of differentiation.- ?) The development of the cortical layers.- ?) The cytological differentiation of the occipital cerebral cortex.- b) Colliculus superior and corpus geniculatum laterale.- ?) Histogenetic similarities and differences in comparison with the cortical development.- ?) The cytological differentiation of the colliculus superior and the corpus geniculatum laterale.- c) The development of the retina.- ?) The ventricular zone.- ?) The inner nuclear layer.- ?) The ganglion cell layer.- ?) Model of the retinal histogenesis.- 3. Comparison of the development of the four visual centers with regard to their functional integration into the visual system.- a) Comparison of the differentiation of the neurons that establish the contact between the individual visual centers.- b) Comparison of the differentiation of the other neurons in the primary visual centers.- V. Summary.- Acknowledgements.- References.