[Transplantation of embryonal brain tissue]

Analysis of the experimental results on the embryonal nervous tissue transplantation into the various parts of the nervous system of animals and man is made in the review. Transplants in many experiments survive and differentiate even in transplantation between different species. Main problem is isolation of specific groups of donor cells, ensuring their survival and differentiation into a given direction in the host brain. The most favourable results are anticipated in the xenotransplantation when the donor cells are those of neural germs of insects and amphibia.