[Biological foundations for neurotransplantation].

A review of the mechanisms underlying cytogenesis and of the nervous tissues, the role of microenvironment, cell interactions in differentiation, and plastic rearrangements in the mammalian brain after transplantation of the embryonic nervous tissue. A common concept has been proposed, which unites biological processes involved in neurotransplantation and may serve as a theoretical base for the formation of ideas on pathways of differentiation of the nervous tissue, stimulation of compensatory processes and regeneration in the developing and pathological brain.