title: Phase advancement of slow-wave sleep in a patient with periodic hypersomnia.
abstract: Twenty-four-hour polysomnographic recordings were obtained during asymptomatic (ASP) and symptomatic (SP) periods in a patient with periodic hypersomnia. During both periods, an abnormal sleep architecture was detected, with a greater sleep fragmentation during the SP. An unexpected finding was a shortening of the latency of slow-wave sleep, with a difference of more than 5 hours between the ASP and the SP. The greater fragmentation of rapid eye movement sleep during the SP may suggest a disorganization of the ultradian rhythm of rapid eye movement sleep.
authors.affiliation: Centre d'Estudis del Son, Hospital General Universitari Vall d'Hebron, Barcelona, Spain.
authors.forename: O
authors.initials: O
authors.lastname: Romero
authors.forename: T
authors.initials: T
authors.lastname: Sagalés
authors.forename: V
authors.initials: V
authors.lastname: Gimeno
authors.forename: J
authors.initials: J
authors.lastname: Cordoba
mesh_terms: D000328:Adult; D006970:Disorders of Excessive Somnolence / Q000175:diagnosis*; D006801:Humans; D008297:Male; D010507:Periodicity; D017286:Polysomnography; D012894:Sleep Stages; D012895:Sleep, REM; D014851:Wakefulness