Irina Pavlovna Bystron

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In 1970 the Boulder Committee described the basic principles of the development of the CNS, derived from observations on the human embryonic cerebrum. Since then, numerous studies have significantly advanced our knowledge of the timing, sequence and complexity of developmental events, and revealed important inter-species differences. We review current data(More)
We describe a distinctive, widespread population of neurons situated beneath the pial surface of the human embryonic forebrain even before complete closure of the neural tube. These 'predecessor' cells include the first neurons seen in the primordium of the cerebral cortex, before the onset of local neurogenesis. Morphological analysis, combined with the(More)
Embryonic germinal zones of the dorsal and ventral telencephalon generate cortical neurons during the final week of gestation in rodent and during several months in human. Whereas the vast majority of cortical interneurons originate from the ventral telencephalon, excitatory neurons are locally generated within the germinal zone of the dorsal telencephalon,(More)
We used a combination of immunohistochemistry and carbocyanine dye tracing to study neurons and their processes in the human embryonic forebrain, 4-7 weeks after conception, before the onset of synaptogenesis. We discovered a widespread network of precocious MAP2 (microtubule-associated protein 2)-immunoreactive cells, with long, nonaxonal processes, before(More)
The survival of xenogenous tissue after transplantation to the brain of Wistar rats without immunosuppression was studied. Cell suspension was prepared from the ventral mesencephalon of human embryos 7-8 weeks of gestation, and injected either into the striatum or motor cortex of adult rats. After 1, 3, 7, 14 days and 1, 3, 6, 8 months the rats were(More)
Suspensional reaggregates were obtained from human neocortical and tegmental anlagen (7 weeks of gestation), using 0.1% tripsin solution, and cultivated in Medium 199. Suspensional reaggregates, formed after 2 days in vitro, were grafted into the Wistar rat striatum. Incipient stages of histogenesis in the reaggregates and their interaction with host brain(More)
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