Dementia-related illnesses are among the most common age-related diseases and will soon become the most pressing health issue in our society due to demographic developments. Since dementias are primarily characterized in their early stages by a decline in cognitive abilities and subsequent behavioral abnormalities, relevant knowledge about the neuropsychology of these conditions is essential. This book provides that knowledge. It is primarily aimed at neuropsychologists and physicians, but also addresses all other health professionals as well as the relatives of dementia patients who wish to learn about the latest knowledge on dementia-related illnesses, the cognitive impairments associated with them, their manifestations, progression, everyday impacts, and treatment options.