Phase advancement of slow-wave sleep in a patient with periodic hypersomnia.
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.
Romero
O
O
Centre d'Estudis del Son, Hospital General Universitari Vall d'Hebron, Barcelona, Spain.
Sagalés
T
T
Gimeno
V
V
Cordoba
J
J
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