Time estimation during nocturnal sleep in human subjects

Aritake, Sayaka; Uchiyama, Makoto; Tagaya, Hirokuni; Suzuki, Hiroyuki; Kuriyama, Kenichi; Ozaki, Akiko; Tan, Xin; Shibui, Kayo; Kamei, Yuichi; Okubo, Yoshiro; Takahashi, Keiichi

doi:10.1016/j.neures.2004.04.006

Cited by 23 publications

(13 citation statements)

References 31 publications

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“…However, the mechanism of self-awakening is not well known. Recently, Aritake et al (2004) 33) reported that time estimation during sleep is more accurate in sleep stage 2 than SWS or REM 34) . Considering that SWS and REM sleep seldom appear in a short afternoon nap, it is possible that sleep without SWS and REM sleep may contribute to the accurate estimate of the elapsed time during a nap.…”

Section: Discussionmentioning

confidence: 99%

Self-Awakening Prevents Acute Rise in Blood Pressure and Heart Rate at the Time of Awakening in Elderly People

et al. 2005

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Self-awakening, waking up at a designated time decided before sleeping, could prevent failure in the blood circulation vessel system such as heart attack, acute increases in heart rate or blood pressure upon waking. Previous research showed that anticipatory changes occurred in heart rate prior to awakening from a short nap by means of self-awakening for young participants. However, the effects of self-awakening remained unclear for elderly people. The present study examined the effects of self-awakening on heart rate and blood pressure in a short afternoon nap (20 min) among the elderly. Nine participants [74.1 (SD = 5.01) years old] underwent both self-awakening and forced-awakening conditions. In the self-awakening condition, it was revealed that blood pressure gradually increased before the scheduled time of awakening, and that heart rate did not show a rapid increase at arousal. In contrast, forced-awakening induced acute increases in both heart rate and blood pressure. These results suggest that self-awakening facilitates a more smooth transition from sleep to wakefulness via autonomic activation before the time of self-awakening.

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Section: Discussionmentioning

confidence: 99%

Self-Awakening Prevents Acute Rise in Blood Pressure and Heart Rate at the Time of Awakening in Elderly People

et al. 2005

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“…Objective measurements of sleep such as polysomnography and actigraphy would be useful. Studies comparing subjective measurements of sleep with objective physiological measures have shown that accuracy of self reports can vary (Aritake et al, 2004;Baker et al, 1999;Fichten et al, 2005;Vanable et al, 2000), but the likelihood of underestimation and overestimation of sleep indices are similar (Fichten et al, 2005;Vanable et al, 2000), and sleepers tend to be consistent in their misperceptions (Baker et al, 1999).…”

Section: Limitations and Future Directionsmentioning

confidence: 99%

Sleep and effort in adolescent athletes

Engle-Friedman

Palencar

Riela

2010

J Child Health Care

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Adolescents' sleep and next day effort was studied in 18 female competitive adolescent athletes. A subjective assessment of the previous night's sleep, their perception of the difficulty of the choices offered and the difficulty of tasks selected was completed before routine lessons. Sleep amount was related to the perception of the difficulty of the task, while awakenings were related to an avoidance of the least preferred maneuvers. Individuals who experienced the greatest number of awakenings and most time awake at night were more likely to select the least difficult of these tasks. Sleep disturbance in adolescence may magnify the challenges they experience and cause them to underestimate their ability to meet those challenges.

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“…Previous studies have identified several factors related to TEA during sleep, including an increased adrenocorticotropic hormone (ACTH) level observed before awakening [6], recurrent semi-awakening during sleep [11,12], differences in preceding sleep structures [13,14], diurnal fluctuation [15,16], and psychological motivation [3,17]. However, the brain region responsible for TEA has not been identified.…”

Section: Introductionmentioning

confidence: 99%

Increased cerebral blood flow in the right frontal lobe area during sleep precedes self-awakening in humans

et al. 2012

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BackgroundSome people can subconsciously wake up naturally (self-awakening) at a desired/planned time without external time stimuli. However, the underlying mechanism regulating this ability remains to be elucidated. This study sought to examine the relationship between hemodynamic changes in oxyhemoglobin (oxy-Hb) level in the prefrontal cortex and sleep structures during sleep in subjects instructed to self-awaken.ResultsFifteen healthy right-handed male volunteers with regular sleep habits participated in a consecutive two-night crossover study. The subjects were instructed to wake up at a specified time (“request” condition) or instructed to sleep until the morning but forced to wake up at 03:00 without prior notice (“surprise” condition). Those who awoke within ± 30 min of the planned waking time were defined as those who succeeded in self-awakening (“success” group). Seven subjects succeeded in self-awakening and eight failed.No significant differences were observed in the amounts of sleep in each stage between conditions or between groups. On the “request” night, an increase in oxy-Hb level in the right prefrontal cortex and a decrease in δ power were observed in the “success” group around 30 min before self-awakening, whereas no such changes were observed in the “failure” group. On the “surprise” night, no significant changes were observed in oxy-Hb level or δ power in either group.ConclusionsThese findings demonstrate a correlation between self-awakening and a pre-awakening increase in hemodynamic activation in the right prefrontal cortex, suggesting the structure’s contribution to time estimation ability.

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Time estimation during nocturnal sleep in human subjects

Cited by 23 publications

References 31 publications

Self-Awakening Prevents Acute Rise in Blood Pressure and Heart Rate at the Time of Awakening in Elderly People

Self-Awakening Prevents Acute Rise in Blood Pressure and Heart Rate at the Time of Awakening in Elderly People

Sleep and effort in adolescent athletes

Increased cerebral blood flow in the right frontal lobe area during sleep precedes self-awakening in humans

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