FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1033702909> ?p ?o ?g. }

• W1033702909 abstract "A number of influential theories of sleep function argue for a closerelationship between body temperature and sleep architecture. The energyconservation theory and thermoregulatory theories of sleep, including the centralnervous system restoration and protection theories, each predict increased SlowWave Sleep (SWS) following elevations in body temperature at sleep onset andduring sleep. It has recently become apparent that appropriately timed eveningbright-light (BL) (>2500 lux) may suppress melatonin, elevate core temperature,and produce delays of the human Core Temperature Rhythm (CTR). While theseeffects are being investigated for their potential within industry and to treatvarious affective and sleep related disorders, the effects of evening BL on sleepare unclear as the literature is small and differing results are reported. The effectsof BL on temperature suggest that enhanced SWS might follow evening BL, asincreased SWS has been empirically associated with elevations in temperature atsleep onset and, to a lesser extent, with a phase-delay of the CTR. However, thesuppression of melatonin associated with evening BL suggests sleep might bedisrupted, as melatonin has been proposed to be a hypnotic agent.In the present thesis three experiments are reported which were designedto investigate the effects of evening BL on rectal temperature and sleep. In thefirst experiment 11 male subjects were twice exposed to BL or Dim-Light (DL)(normal room illumination) for 2hrs prior to habitual bedtime for two consecutivenights in a crossover design. Rectal temperature was significantly elevatedduring the first and second hours following BL, and significantly more Stage 3sleep and SWS occurred with a trend for increased SWS in the fourth sleep cycle.The second experiment was designed to assess the immediate effects ofevening BL on core temperature and sleep, independent from potential CTRphase-shifting effects produced after multiple exposures to evening BL on consecutive evenings. 11 male subjects were run in two conditions. In the BLcondition Ss were exposed to BL for three consecutive evenings and to DL on thefourth. In the dim-light condition Ss were exposed to DL on all four evenings. Itwas anticipated that three consecutive exposures to evening BL would phasedelaythe CTR such that the effects of a temperature rhythm delay on sleepcould be assessed independent of BL itself on night 4. On night 1 no significantelevation in rectal temperature was found but SWS was increased in the fourthsleep cycle. On night 3 rectal temperature was significantly elevated during thefirst two hours following BL, and SWS and Slow Wave Activity (SWA) (.25-3Hz EEG activity) were significantly increased across the night, most noticeably inthe third sleep cycle. No differences in the position of the CTR were evident onnight 4, but temperature in the BL condition was significantly lower than in theDL condition during the first and fifth hours following light exposure. Inaddition, sleep onset latency (SOL) and amounts of Wake were increased in theBL condition on this night. The results indicated that BL administered untilhabitual bedtime over three consecutive nights may produce immediate effects oncore temperature without necessarily delaying the CTR. The SWS enhancingeffects of evening BL were found when, and only when, core temperature wassignificantly elevated around the time of sleep onset. This experiment alsosuggested that these effects are found more robustly following more than oneexposure to BL. The third experiment was designed to test this hypothesis. A betweensubjectsdesign was utilised in which three groups of 12 male subjects were runin three conditions. In the Dim-Dim (DD) condition subjects were exposed toDL for two consecutive nights. In the Dim-Bright (DB) condition subjects wereexposed to DL on night 1 and BL on night 2 over consecutive nights. In theBright-Bright (BB) condition subjects were exposed to BL on both nights.Rectal temperature during the first hour following light treatment wassignificantly elevated in the BB condition and non-significantly elevated in the, DB condition compared to the DD condition. SWA and Total EEG Power (TP)(0.25 Hz to 50 Hz EEG activity) were enhanced in both the DB and BB conditions. In addition, significantly more SWS was found to occur in the fourthsleep cycle in the DB and BB conditions compared with the DD condition. Thus,evening BL elevated rectal temperature and enhanced SWS upon a singleexposure, but these effects were enhanced by exposure to the light on theprevious night.Taken together these experiments indicate that evening bright lightelevates rectal temperature and SWS/SWA increases during subsequent sleep,particularly late in the night. These results are consistent with other experimentalparadigms in which temperature is raised (e.g. exercise and passive heating) andSWS is observed to increase. Interpreted this way the results add to the body ofevidence that suggests SWS and thermoregulation are intimately linked. Anotherpossible interpretation is that a rebound in melatonin following early suppressionby bright-light produced increased SWS later the same night. It is also possiblethat both thermal and melatonin rebound effects occurred following eveningbright-light; the thermal effects maintained SWS levels under conditions ofmelatonin suppression early in the sleep period while melatonin rebound later in the sleep period resulted in the most prominent increases in SWS. Furtherresearch might examine this possibility by monitoring plasma melatonin levels,temperature and SWS continuously following evening bright-light. The majorfinding of this thesis is that bright-light administered until habitual bedtimeproduces immediate elevations in temperature and increased SWS/SWA,especially late in the night." @default.
• W1033702909 created "2016-06-24" @default.
• W1033702909 creator A5072459770 @default.
• W1033702909 date "1996-01-01" @default.
• W1033702909 modified "2023-09-24" @default.
• W1033702909 title "The effects of evening bright-light on human body temperature and sleep architecture" @default.
• W1033702909 cites W112084252 @default.
• W1033702909 cites W125187619 @default.
• W1033702909 cites W148342677 @default.
• W1033702909 cites W1493099167 @default.
• W1033702909 cites W1569045141 @default.
• W1033702909 cites W1663683240 @default.
• W1033702909 cites W170023062 @default.
• W1033702909 cites W170572026 @default.
• W1033702909 cites W1728677071 @default.
• W1033702909 cites W1786661195 @default.
• W1033702909 cites W1830741797 @default.
• W1033702909 cites W187135256 @default.
• W1033702909 cites W189119140 @default.
• W1033702909 cites W1903780185 @default.
• W1033702909 cites W1967019353 @default.
• W1033702909 cites W1969640104 @default.
• W1033702909 cites W1969934516 @default.
• W1033702909 cites W1970197079 @default.
• W1033702909 cites W1970285136 @default.
• W1033702909 cites W1970574559 @default.
• W1033702909 cites W1970863361 @default.
• W1033702909 cites W1972216570 @default.
• W1033702909 cites W1972716292 @default.
• W1033702909 cites W1975395144 @default.
• W1033702909 cites W1976192856 @default.
• W1033702909 cites W1978027412 @default.
• W1033702909 cites W1979279168 @default.
• W1033702909 cites W1981467048 @default.
• W1033702909 cites W1982248012 @default.
• W1033702909 cites W1987141667 @default.
• W1033702909 cites W1987796397 @default.
• W1033702909 cites W1989231917 @default.
• W1033702909 cites W19913304 @default.
• W1033702909 cites W1991588217 @default.
• W1033702909 cites W1991784123 @default.
• W1033702909 cites W1995042086 @default.
• W1033702909 cites W1997654685 @default.
• W1033702909 cites W1998857190 @default.
• W1033702909 cites W1999625136 @default.
• W1033702909 cites W2003623977 @default.
• W1033702909 cites W2004466433 @default.
• W1033702909 cites W2010038812 @default.
• W1033702909 cites W2011104380 @default.
• W1033702909 cites W2013921113 @default.
• W1033702909 cites W2017781886 @default.
• W1033702909 cites W2019032283 @default.
• W1033702909 cites W2020027128 @default.
• W1033702909 cites W2022496632 @default.
• W1033702909 cites W2023318767 @default.
• W1033702909 cites W2024313017 @default.
• W1033702909 cites W2024688316 @default.
• W1033702909 cites W2027833589 @default.
• W1033702909 cites W2029323550 @default.
• W1033702909 cites W2034551798 @default.
• W1033702909 cites W2036538417 @default.
• W1033702909 cites W2037369118 @default.
• W1033702909 cites W2048648526 @default.
• W1033702909 cites W2049092628 @default.
• W1033702909 cites W2050108673 @default.
• W1033702909 cites W2052110844 @default.
• W1033702909 cites W2052395141 @default.
• W1033702909 cites W2052495561 @default.
• W1033702909 cites W2052782936 @default.
• W1033702909 cites W205505399 @default.
• W1033702909 cites W2061341550 @default.
• W1033702909 cites W2062185132 @default.
• W1033702909 cites W2072975433 @default.
• W1033702909 cites W2073618030 @default.
• W1033702909 cites W2073679955 @default.
• W1033702909 cites W2080861726 @default.
• W1033702909 cites W2082333838 @default.
• W1033702909 cites W2088418492 @default.
• W1033702909 cites W2090511381 @default.
• W1033702909 cites W2096352061 @default.
• W1033702909 cites W2098919669 @default.
• W1033702909 cites W2101905036 @default.
• W1033702909 cites W2115155158 @default.
• W1033702909 cites W2115576097 @default.
• W1033702909 cites W2123138830 @default.
• W1033702909 cites W2141678776 @default.
• W1033702909 cites W2143976629 @default.
• W1033702909 cites W2163920027 @default.
• W1033702909 cites W2177353174 @default.
• W1033702909 cites W2177895881 @default.
• W1033702909 cites W2190637250 @default.
• W1033702909 cites W219736741 @default.
• W1033702909 cites W2222367475 @default.
• W1033702909 cites W2225813577 @default.
• W1033702909 cites W2233917004 @default.
• W1033702909 cites W2268972136 @default.
• W1033702909 cites W2285135416 @default.
• W1033702909 cites W2296681489 @default.
• W1033702909 cites W2392288646 @default.
• W1033702909 cites W2396104508 @default.

• next