title: [Effects of long-term isolation and anticipation of significant event on sleep: results of the project "Mars-520"].
abstract: The purpose of the research was to study effect of long-term isolation on night sleep. The data were collected during international ground simulation of an interplanetary manned flight--"Mars-500". The polysomnographic recordings of six healthy men were performed before, four times during and after 520-days confinement. During the isolation sleep efficiency and delta-latency decreased, while sleep latency increased. Post-hoc analysis demonstrate significant differences between background and the last (1.5 months before the end of the experiment) measure during isolation. Frequency of nights with low sleep efficiency rose on the eve of the important for the crew events (simulation of Mars landing and the end of the confinement). Two weeks after the landing simulation, amount of the nights with a low sleep efficiency significantly decreased. Therefore, anticipation of significant event under condition of long-term isolation might result in sleep worsening in previously healthy men, predominantly difficulties getting to sleep.
authors.forename: I M
authors.initials: IM
authors.lastname: Zavalko
authors.forename: E I
authors.initials: EI
authors.lastname: Rasskazova
authors.forename: S A
authors.initials: SA
authors.lastname: Gordeev
authors.forename: S Iu
authors.initials: SIu
authors.lastname: Palatov
authors.forename: G V
authors.initials: GV
authors.lastname: Kovrov
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D018535:Mars; D012890:Sleep; D012893:Sleep Wake Disorders / Q000209:etiology / Q000503:physiopathology*; D013026:Space Flight; D013997:Time Factors