List of contributors. Preface. 1. The subventricular zone: source of neuronal precursors for brain repair (A.Alvarez-Buylla, D.G. Herrera and H. Wichterle). 2. Neural stem cells in the developing central nervous system: implications for cell therapy through transplantation (C.N. Svendsen and M.A. Caldwell). 3. Activity-dependent regulation of neuronal plasticity and self repair (G. Kempermann, H. van praag and F.H. Gage). 4. Immortalized neural cell lines for CNS transplantation (S.R. Whittemore and S.M. Onifer). 5. The chick/quail transplantation model to study central nervous system development (R.-M. Alvarado-Mallart). 6. Novel mechanisms in mammalian telencephalic development as revealed by neural transplantation ( K. Campbell and M. Olsson). 7. Reconstruction of cortical circuitry (M.A. Gates, R.A. Fricker and J.D. Macklis). 8. Xenotransplantation (E.B. Pedersen and H. Widner). 9. Encapsulated neural transplants (J.L. Tseng and P. Aebischer). 10. Improving the survival of grafted embryonic dopamine neurons in rodent models of Parkinson's disease (R.F. Castillo, O.Hansson and P. Brundin). 11. Transplantation in the rat model of Parkinson's disease: ectopic versus, homotopic graft placement (C. Winkler, D. Kirik, A. Björklund and S.B. Dunnett). 12. The primate model of Parkinson's disease: its usefulness, limitations, and importance in directing future studies (K.D. Bingaman and R.A.E. Bakay). 13. Clinical observations after neural transplantation in Parkinson's disease (O. Lindvall and P. Hagell). 14. Non-invasive in vivo imaging of transplant function (D.J. Brooks and P. Piccini). 15. Neurophatology of fetal nigra transplants for Parkinson's disease (J.H. Kordower and C.E. Sortwell). 16. The integration and function of striatal grafts (S.B. Dunnett, F. Nathwani and a. Björklund). 17. Striatal tissue transplantation in non-human primates (A.L. Kendall, P. Hantraye and S. Palfi). 18. Neural transplantation for the treatment of Huntington's disease (T.B.