Neurologic and neuropsychiatric disorders are of great importance to societies, and they also raise special considerations in epidemiological research methodology. Not only do neurologic and neuropsychiatric disorders form a major group of disorders associated with ageing populations, but those disorders that occur in earlier life can be associated with severe individual, family, and societal distress and burden. The inter-relationship of syndromes and disorders is a topic of major interest and growing biological insights across psychiatry and neurology. This includes not only overlaps in neurodegenerative syndromes but also those related to other systems such as metabolic, inflammatory, immune, and vascular disorders. Part of the Oxford Textbooks in Clinical Neurology series, the Oxford Textbook of Neurologic and Neuropsychiatric Epidemiology is designed to focus on the overlaps and inter-relationships between neuro-epidemiological disorders, as well as on ways to harmonise large cohort studies to maximise opportunities for determining causes related to rarer disorders. Divided into three main parts, the book covers 1) the principles of neurologic and neuropsychiatric epidemiology; 2) specific neuropsychiatric disorders and their inter-relationships; and 3) the implications of neuro-epidemiologic research for patient populations and current medical practice. This comprehensive work serves as an invaluable reference to current neuro-epidemiological methods for neurologists, psychiatrists, and senior trainees in those disciplines, as well as public health practitioners and students with an interest in neurology and neuropsychiatry.