A 19-h spontaneous sleep period in idiopathic central nervous system hypersomnia
Abstract:Reports of prolonged sleep periods in idiopathic central nervous system hypersomnia, as shown by ad libitum sleep recordings, are rare. A patient with idiopathic hypersomnia with extremely long sleep periods and sleep drunkenness after awakening is described. Polysomnographic recordings showed a spontaneous sleep period of 19.4 h and a normal Multiple Sleep Latency Test. These polysomnographic findings are clearly abnormal but essentially different from those of narcolepsy. Unlike narcolepsy, `idiopathic hypersomnia' does not seem to be a distinct clinical entity but a category for different heterogenous subtypes.
Keywords: idiopathic hypersomnia, narcolepsy
Document Type: Research Article
Affiliations: Abteilung fur Psychiatrie und Psychotherapie, Klinikum der Albert-Ludwigs-Universitat, Hauptstrasse 5, 79104 Freiburg, Germany. Tel.: +49-761-270-6603; Fax.: +49-761-270-6523
Publication date: 1998-06-01