Accumulation Of Sleep Research Articles

Altered sleep architecture following consecutive nights of presleep alcohol.

Alcohol consumption before sleep decreases sleep latency, explaining the common use of alcohol as a sleep aid. The full impact of alcohol on sleep architecture is not well understood, particularly the potential cumulative effects of presleep alcohol consumption across consecutive nights. Here, we describe the effects of presleep alcohol on sleep architecture across three consecutive nights. Thirty adult participants took part in a crossover, within-participants study consisting of two sets of three consecutive nights of in-lab polysomnography. For each series of nights, participants drank one of the two beverages: a mixer only or a mixer plus alcohol (targeting a BrAC of 0.08 mg/L), ending 1 hour before lights out. Polysomnography (PSG) was used to stage sleep, and standard sleep variables were extracted. Linear mixed-effect analysis and generalized additive modeling were used to examine the effect of alcohol on sleep architecture. Alcohol before sleep increased the rate of slow wave sleep (SWS) accumulation across all three nights and decreased the rate of rapid eye movement (REM) sleep accumulation at the start of each night. Alcohol also decreased the total amount of REM sleep but did not affect the total amount of SWS each night. These data indicate that drinking alcohol before sleep substantially affects sleep architecture, including changes to the rate of accumulation of SWS and REM sleep. We show that alcohol disrupts normal sleep architecture, leading to a significant decrease in REM sleep; thus, the use of alcohol as a sleep aid remains a public health concern.

0640 Tasimelteon Significantly Improves REM Sleep Accumulation During an 8-hour Phase Advance in the JET8 Study

0640 Tasimelteon Significantly Improves REM Sleep Accumulation During an 8-hour Phase Advance in the JET8 Study

Pain Coping Strategies for Tension-Type Headache: Possible Implications for Insomnia?

Insomnia has been identified as a risk factor for tension-type headache, although the pathogenesis of sleep disturbance in this population is unclear. The present study examined pain-related self-management strategies in a nonclinical, young-adult sample for preliminary evidence to support a novel hypothesis for the development of insomnia in this population. Self-report data on triggers of headache, pain interference with sleep, and pain-related self-management strategies were analyzed for 32 women with tension-type headache and 33 women with minimal pain who served as controls. The results revealed that a significantly greater proportion of the headache group relative to the control group reported sleep problems as a trigger of headaches, stress as a trigger of headache, and going to sleep as a coping strategy for pain. The headache group also reported significantly higher ratings of pain interference with sleep. Going to sleep was the most commonly used self-management strategy (81%) by headache sufferers and also rated as the most effective strategy (5.5 out of 7.0). These findings suggest that a bidirectional relationship between sleep disturbance and headache is present in this young-adult sample. Furthermore, the frequent use of sleep as a self-management strategy for pain is consistent with the hypothesis that sleep-seeking behavior might be a mediating factor in the development of insomnia among people with tension-type headache. This hypothesis fits within the most widely accepted conceptual model of chronic insomnia and should be further investigated in individuals with both tension-type headache and insomnia.

Human sleep: its duration and organization depend on its circadian phase.

Two- to threefold variations in sleep length were observed in 12 subjects living on self-selected schedules in an environment free of time cues. The duration of polygraphically recorded sleep episodes was highly correlated with the circadian phase of the body temperature rhythm at bedtime and not with the length of prior wakefulness. Furthermore, the rate of REM (rapid eye movement) sleep accumulation , REM latency, bedtime selection, and self-rated alertness assessments were also correlated with the body temperature rhythm.