The first-night effect of sleep occurs over nonconsecutive nights in unfamiliar and familiar environments.

IF 5.6 2区 医学 Q1 Medicine
Sleep Pub Date : 2024-10-11 DOI:10.1093/sleep/zsae179
Anna Zoé Wick, Selina Ladina Combertaldi, Björn Rasch
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Abstract

The first night in an unfamiliar environment is marked by reduced sleep quality and changes in sleep architecture. This so-called first-night effect (FNE) is well established for two consecutive nights and lays the foundation for including an adaptation night in sleep research to counteract FNEs. However, adaptation nights rarely happen immediately before experimental nights, which raises the question of how sleep adapts over nonconsecutive nights. Furthermore, it is yet unclear, how environmental familiarity and hemispheric asymmetry of slow-wave sleep (SWS) contribute to the explanation of FNEs. To address this gap, 45 healthy participants spent two weekly separated nights in the sleep laboratory. In a separate study, we investigated the influence of environmental familiarity on 30 participants who spent two nonconsecutive nights in the sleep laboratory and two nights at home. Sleep was recorded by polysomnography. Results of both studies show that FNEs also occur in nonconsecutive nights, particularly affecting wake after sleep onset, sleep onset latency, and total sleep time. Sleep disturbances in the first night happen in both familiar and unfamiliar environments. The degree of asymmetric SWS was not correlated with the FNE but rather tended to vary over the course of several nights. Our findings suggest that nonconsecutive adaptation nights are effective in controlling for FNEs, justifying the current practice in basic sleep research. Further research should focus on trait- and fluctuating state-like components explaining interhemispheric asymmetries.

在陌生和熟悉的环境中,睡眠的 "头晚效应 "会在不连续的夜晚发生。
在陌生环境中度过的第一夜,睡眠质量会下降,睡眠结构也会发生变化。这种所谓的 "首夜效应"(FNE)在连续两晚的实验中都得到了证实,并为在睡眠研究中加入 "适应夜 "以抵消FNE奠定了基础。然而,适应夜很少紧接着实验夜发生,这就提出了睡眠如何在非连续夜中适应的问题。此外,环境熟悉程度和慢波睡眠(SWS)的半球不对称性如何有助于解释FNE,目前尚不清楚。为了填补这一空白,45 名健康参与者每周在睡眠实验室度过两个不同的夜晚。在另一项研究中,我们调查了环境熟悉程度对30名参与者的影响,这些参与者在睡眠实验室度过了两个非连续的夜晚,并在家中度过了两个夜晚。研究人员通过多导睡眠监测仪记录睡眠情况。这两项研究的结果表明,非连续性夜晚也会出现快速睡眠障碍,尤其会影响睡眠开始后的唤醒、睡眠开始潜伏期和总睡眠时间。第一夜的睡眠障碍既发生在熟悉的环境中,也发生在陌生的环境中。非对称SWS的程度与FNE并不相关,而是在几个晚上都会发生变化。我们的研究结果表明,非连续的适应性夜晚能有效控制FNE,这也证明了目前基础睡眠研究的做法是正确的。进一步的研究应侧重于解释半球间不对称的特质和波动状态类成分。
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来源期刊
Sleep
Sleep Medicine-Neurology (clinical)
CiteScore
8.70
自引率
10.70%
发文量
0
期刊介绍: SLEEP® publishes findings from studies conducted at any level of analysis, including: Genes Molecules Cells Physiology Neural systems and circuits Behavior and cognition Self-report SLEEP® publishes articles that use a wide variety of scientific approaches and address a broad range of topics. These may include, but are not limited to: Basic and neuroscience studies of sleep and circadian mechanisms In vitro and animal models of sleep, circadian rhythms, and human disorders Pre-clinical human investigations, including the measurement and manipulation of sleep and circadian rhythms Studies in clinical or population samples. These may address factors influencing sleep and circadian rhythms (e.g., development and aging, and social and environmental influences) and relationships between sleep, circadian rhythms, health, and disease Clinical trials, epidemiology studies, implementation, and dissemination research.
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