Journal ArticleDOI
The Effects of a Restricted Sleep Regime on the Composition of Sleep and on Performance
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TLDR
The results show that the effects of a restricted sleep regime on the composition of sleep are partly a function of the time of night to which sleep is restricted, and it is suggested that the performance deficits are due to loss of sleep per se rather than due to any change in the compositions of sleep.Abstract:
This study examined the effects of restricting sleep to the first or second half of the night on the composition of sleep and on performance. Eight young women who regularly slept for 8–8.5 hrs a night had their sleep restricted to the first or second half of the night for two consecutive nights. Performance of a 20-min unprepared simple reaction time task was measured at fixed times of day for the two restricted sleep conditions and for a full night sleep control condition. Restricting sleep to the second half of the night produced higher amounts of REM sleep and Stage 4 sleep and lower amounts of Stage 2 sleep compared to restricting sleep to the first half of the night. Both restricted sleep conditions impaired performance relative to the full night sleep control, and performance was worse after two nights of restricted sleep than after one night of restricted sleep. The results show that the effects of a restricted sleep regime on the composition of sleep are partly a function of the time of night to which sleep is restricted. It is suggested that the performance deficits are due to loss of sleep per se rather than due to any change in the composition of sleep.read more
Citations
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Journal ArticleDOI
Cumulative sleepiness, mood disturbance, and psychomotor vigilance performance decrements during a week of sleep restricted to 4-5 hours per night
David F. Dinges,Frances M. Pack,Katherine M Williams,Kelly A. Gillen,John W. Powell,Geoffrey E. Ott,Caitlin Aptowicz,Allan I. Pack +7 more
TL;DR: It is suggested that cumulative nocturnal sleep debt had a dynamic and escalating analog in cumulative daytime sleepiness and that asymptotic or steady-state sleepiness was not achieved in response to sleep restriction.
Journal ArticleDOI
Parity and sleep patterns during and after pregnancy
TL;DR: Sleep disturbance was greatest during the first postpartum month, particularly for first-time mothers, and sleep efficiency remained significantly lower than baseline prepregnancy values.
Journal ArticleDOI
How much sleep do we need
Michele Ferrara,Luigi De Gennaro +1 more
TL;DR: There is increasing concern for sleeplessness-related risks in modern society, and experimental data on the effects of both acute and cumulative partial sleep deprivation consistently point out that sleep restriction has substantial negative effects on sleepiness, motor and cognitive performance and mood, as well as on some metabolic, hormonal and immunological variables.
Journal ArticleDOI
Managing fatigue: It's about sleep
Drew Dawson,Kirsty McCulloch +1 more
TL;DR: A conceptual basis for managing the first two levels of an error trajectory for fatigue is presented, based upon a prior sleep/wake model, which determines fatigue-risk thresholds by the amount of sleep individuals have acquired in the prior 24 and 48 h.
References
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Journal ArticleDOI
Cumulative Effects of Sleep Restriction on Daytime Sleepiness
TL;DR: During the recovery period, daytime sleepiness returned to basal values on all three measures following one full night of sleep; with a daytime nap, no further cumulative effects of sleep restriction were seen.
Journal ArticleDOI
Responses to auditory stimulation, sleep loss and the eeg stages of sleep.
Journal ArticleDOI
Stage 4 Sleep: Influence of Time Course Variables
Wilse B. Webb,H. W. Agnew +1 more
TL;DR: Sleep periods that begin at times other than the regular onset time tend to produce less stage 4 sleep; this decrease suggests a circadian effect.
Journal ArticleDOI
Field test of arousal: a portable reaction timer with data storage.
R. T. Wilkinson,D. Houghton +1 more
TL;DR: A portable, unprepared simple reaction time (USRT) test is described, particularly suitable for assessing performance in the field as a function of arousal-related stress.