A 19-h spontaneous sleep period in idiopathic central nervous system hypersomnia.
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 form those of narcolepsy. Unlike narcolepsy, 'idiopathic hypersomnia' does not seem to be a distinct clinical entity but a category for different heterogenous subtypes.
Department of Psychiatry and Psychotherapy, Albert-Ludwigs-University of Freiburg, Germany.
U
U
Voderholzer
J
J
Backhaus
M
M
Hornyak
F
F
Hohagen
M
M
Berger
D
D
Riemann
D000293:Adolescent; D006970:Disorders of Excessive Somnolence / Q000175:diagnosis*; D006801:Humans; D008297:Male; D012894:Sleep Stages / Q000502:physiology*; D013997:Time Factors