Abstract
The chapter is devoted to sleep and sleep disorders definitions, survey of a history, epidemiology, pathophysiology and etiopathogenesis, diagnostic procedures and classification of sleep disorders. A detailed description covers clinical features and treatment in insomnia, sleep breathing sleep disorders, excessive daytime sleepiness, circadian rhythm disorders, parasomnias and abnormal movements during sleep.
The attention is focused also on sleep disorders in neurological diseases and on the importance of sleep for human health.