Ideopathic hypersomnia

An attempt is made at categorizing the sleep disorders according to various features. According to syndromes we distinguish hyposomnias, hypersomnias, dyssomnias, parasomnias, and the mixed hypo- and dyssomnias. With respect to phenomena the hyposomnias are subdivided into the disorders of falling asleep, sleeping through the night, early morning waking-up and sleep reversal. Thereafter an attempt is made at describing the sleep disorders according to their etiology: hyposomnias are subdivided into primary, essential or ideopathic type, secondary type in the context of organic and psychiatric disorders, reactive hyposomnias, and finally pharmacologically induced or iatrogenic sleep disorders...