This book details neurotoxicology research about the neurotoxic effects of substances on the young, adult or aging nervous system. Chapters (both review and original research papers) about the epidemiological reports, animal research, in vitro adverse effects of toxic agents on neurodevelopment and mature nervous systems are included. Neurotoxicity contributes to pathogenesis of neurodevelopmental, neurobehavioral, and neurodegenerative disorders. The chapters provide a basic foundation on the significant outcome effects on current knowledge in neurotoxicity research.