This book offers a concise, methodological approach to the evaluation and treatment of patients with sleep disorders. The management of sleep disorders requires an understanding of sleep itself, thus the book initially discusses aspects of normal sleep. The remainder of the book provides a formula for critical assessment, in which the symptoms and signs and the psychological and medical background of the patient, in conjunction with an understanding of the neurobiological and psychological basis of sleep disorders, are considered. Polysomnographic studies and other laboratory tests supplement and redefine clinical information and assist physicians in their treatment options.