S-8 New Approaches to Therapy and Drug Developments Targeted on Neurodegeneration and Neurogenesis   S8-1. Drug Development for Neurogenesis Following Brain Ischemia   S8-2. Treatment Strategy for Parkinson’s Disease   S8-3. Autophagic Mechanism in Excitotoxicity and Its Implications in Neurodegenerative Diseases   S8-4. Effects of Nobiletin, a Citrus Flavonoid Rescuing Memory Impairment, on the CNS Neurodegeneration   S8-5. Adult Neural Stem Cells and Neurogenesis   S8-6. Targeting Seed Aß as a Novel Therapeutic Strategy for Alzheimer's Disease