Self‐awakening improves alertness in the morning and during the day after partial sleep deprivation

Ikeda, Hiroki; Kubo, Tomohide; Kuriyama, Kenichi; Takahashi, Masaya

doi:10.1111/jsr.12176

Cited by 3 publications

(2 citation statements)

References 39 publications

(67 reference statements)

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“…Outcome measures, testing points, timing of awakening, and prior sleep/wake history, and length of sleep periods varied, and as such, direct comparisons between studies were not possible. Six countermeasure categories were identified: caffeine28, 30, 31, 32 ) ; light13, 28, 33, 34, 35, 36 ) ; sound37, 38 ) ; temperature39, 40 ) ; self-awakening6, 41, 42, 43 ) ; and face-washing28 ) .…”

Section: Search Methodsmentioning

confidence: 99%

“…This study is another example highlighting the importance, when investigating sleep inertia countermeasures, of setting experimental conditions that are likely to produce sleep inertia. For example, Ikeda and colleagues investigated self-awakening following partial sleep restriction43, 107 ) . In contrast to Kaida and colleagues’ studies41, 42 ) , improvement was observed on cognitive tasks following self-awakening, but there were no significant differences in subjective sleepiness ratings.…”

Section: Self-awakeningmentioning

confidence: 99%

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Time to wake up: reactive countermeasures to sleep inertia

2016

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Sleep inertia is the period of impaired performance and grogginess experienced after waking. This period of impairment is of concern to workers who are on-call, or nap during work hours, and need to perform safety-critical tasks soon after waking. While several studies have investigated the best sleep timing and length to minimise sleep inertia effects, few have focused on countermeasures -especially those that can be implemented after waking (i.e. reactive countermeasures). This structured review summarises current literature on reactive countermeasures to sleep inertia such as caffeine, light, and temperature and discusses evidence for the effectiveness and operational viability of each approach. Current literature does not provide a convincing evidence-base for a reactive countermeasure. Caffeine is perhaps the best option, although it is most effective when administered prior to sleep and is therefore not strictly reactive. Investigations into light and temperature have found promising results for improving subjective alertness; further research is needed to determine whether these countermeasures can also attenuate performance impairment. Future research in this area would benefit from study design features highlighted in this review. In the meantime, it is recommended that proactive sleep inertia countermeasures are used, and that safety-critical tasks are avoided immediately after waking.

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Section: Search Methodsmentioning

confidence: 99%

Section: Self-awakeningmentioning

confidence: 99%

Time to wake up: reactive countermeasures to sleep inertia

2016

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Quantifying the effects of sleep loss: relative effect sizes of the psychomotor vigilance test, multiple sleep latency test, and maintenance of wakefulness test

et al. 2022

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The psychomotor vigilance test (PVT) is a widely-used, minimally invasive, inexpensive, portable, and easy to administer behavioral measure of vigilance that is sensitive to sleep loss. We conducted analyses to determine the relative sensitivity of the PVT vs. the multiple sleep latency test (MSLT) and the maintenance of wakefulness test (MWT) during acute total sleep deprivation (TSD) and multiple days of sleep restriction (SR) in studies of healthy adults. Twenty-four studies met criteria for inclusion. Since sleepiness countermeasures were administered in some of these studies, the relative sensitivity of the three measures to these interventions was also assessed. The difference in weighted effect size (eta-squared) was computed for each pair of sleepiness measures based on available raw test data (such as average PVT reaction time). Analyses revealed that the sleep measures were differentially sensitive to various types of sleep loss over time, with MSLT and MWT more sensitive to TSD than the PVT. However, sensitivity to SR was comparable for all three measures. The PVT and MSLT were found to be differentially sensitive to administration of sleepiness countermeasures (drugs, sleep loss, etc.), but PVT and MWT were found to be comparably sensitive to these interventions. These findings suggest the potential utility of the PVT as a component of next-generation fatigue risk management systems.

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Sleeping with time in mind? A literature review and a proposal for a screening questionnaire on self-awakening

Verga

D'Este²,

Cassani³

et al. 2023

PLoS ONE

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Some people report being able to spontaneously “time” the end of their sleep. This ability to self-awaken challenges the idea of sleep as a passive cognitive state. Yet, current evidence on this phenomenon is limited, partly because of the varied definitions of self-awakening and experimental approaches used to study it. Here, we provide a review of the literature on self-awakening. Our aim is to i) contextualise the phenomenon, ii) propose an operating definition, and iii) summarise the scientific approaches used so far. The literature review identified 17 studies on self-awakening. Most of them adopted an objective sleep evaluation (76%), targeted nocturnal sleep (76%), and used a single criterion to define the success of awakening (82%); for most studies, this corresponded to awakening occurring in a time window of 30 minutes around the expected awakening time. Out of 715 total participants, 125 (17%) reported to be self-awakeners, with an average age of 23.24 years and a slight predominance of males compared to females. These results reveal self-awakening as a relatively rare phenomenon. To facilitate the study of self-awakening, and based on the results of the literature review, we propose a quick paper-and-pencil screening questionnaire for self-awakeners and provide an initial validation for it. Taken together, the combined results of the literature review and the proposed questionnaire help in characterising a theoretical framework for self-awakenings, while providing a useful tool and empirical suggestions for future experimental studies, which should ideally employ objective measurements.

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Self‐awakening improves alertness in the morning and during the day after partial sleep deprivation

Cited by 3 publications

References 39 publications

Time to wake up: reactive countermeasures to sleep inertia

Time to wake up: reactive countermeasures to sleep inertia

Quantifying the effects of sleep loss: relative effect sizes of the psychomotor vigilance test, multiple sleep latency test, and maintenance of wakefulness test

Sleeping with time in mind? A literature review and a proposal for a screening questionnaire on self-awakening

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