A 19-h spontaneous sleep period in idiopathic central nervous system hypersomnia

Ulrich Voderholzer, Jutta Backhaus, Magdolna Hornyak, Fritz Hohagen, Mathias Berger, Dieter Riemann

7 Citations (Scopus)


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.

Original languageEnglish
JournalJournal of Sleep Research
Issue number2
Pages (from-to)101-103
Number of pages3
Publication statusPublished - 1998

Research Areas and Centers

  • Academic Focus: Center for Brain, Behavior and Metabolism (CBBM)


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