Genetic Manipulation of the Nervous System: An Overview. Non-Neurotropic Adenovirus: A Vector for the Gene Transfer to the Brain and Possible Gene Therapy of Neurological Disorders. Adenovirus: A New Tool to Transfer Genes Into the Central Nervous System for Treatment of Neurodegenerative Disorders. Adenovirus-Mediated Gene Therapy of Tumours in the Central Nervous System. Gene Delivery Using Adeno-Associated Virus. Herpes Simplex Virus-Based Vectors. Gene Delivery Using HSV-1 Plasmid Vectors. Problems in the Use of Herpes Simplex Virus as a Vectors. Gene Delivery to the Nervous System By Direct Injection of Retroviral Vector. Gene Delivery to the Nervous System Using Retroviral Vectors. Transplantation of Genetically Modified Non-Neuronal Cells in the Central Nervous System. Genetic Animal Models for Alzheimer's Disease. Neuronal Precursors in the Brain of Adult Mammals: Biology and Applications. Direct Injection of Plasmid DNA Into the Brain. Antisense Oligodeoxynucleotides as Novel Neuropharmacological Tools for Selective Expression Blockade in the Brain.