“…Adult mammalian brain (including human brain) contains neural stem cells in the subependymal zone of the lateral ventricles and in the subgranular zone of the hippocampal fascia dentata [17,32,33,[38][39][40]63,67,95,102,120]. Due to the capacity to differentiate into neurons and glia, transplantation of neural stem and progenitor cells opens new vistas for the treatment of many diseases and injuries of human central nervous system [1,2,4,6,24,26,31,82,84,98,103,105,107,109,117,121]. However, the use of human fetal stem cells for this purpose is associated with many ethical and religious problems [49,85], while transplantation of neural stem cells located in structures of mature brain is in fact impossible, because these cells can be obtained only by invasive neurosurgical methods.…”