The ever-rising increase in the consumption of medicinal herbs and its products and its exposure in the human population have generated concerns about the potential neurotoxicity of several new and existing botanicals. This book offers an accurate, relevant, and comprehensive coverage of a wide variety of medicinal herbs and fungi affecting the central and peripheral nervous system. It includes review articles that thoroughly describe the benefits and adverse effects of some of the most commonly used medicinal herbs and fungi, and the pathophysiological mechanisms underlying them. The book provides an all-inclusive overview of the diverse aspects of medicinal herbs and fungi related to neurotoxicity and/or neuroprotection, ranging from discussions of cellular and molecular processes and pathology to clinical aspects. The rich compilation brings together thorough and extensive research updates on the advances in the field. The chapters have been contributed by the experienced and eminent academicians, researchers, and scientists working in the field across the globe.