A two-night comparison in the sleep laboratory as a tool to challenge the relationship between sleep initiation, cardiophysiological and thermoregulatory changes in women with difficulties initiating sleep and thermal discomfort

Anders, Doreen; Gompper, Britta; Kräuchi, Kurt

doi:10.1016/j.physbeh.2013.02.020

Cited by 9 publications

(3 citation statements)

References 28 publications

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“…Many studies have reported that various degrees of sleep deprivation increased delta power in the recovery night [ 24 ]. Anders et al reported that the increase of delta power in the early hours of natural nocturnal sleep was associated with decrease of core body temperature [ 25 ]. Most experimental studies have indicated that the increase of delta power in the first few hours of nocturnal sleep is associated with the decline of core body temperature [ 26 ], while association between delta power and core body temperature in the middle or late hours of nocturnal sleep was not clearly demonstrated.…”

Section: Discussionmentioning

confidence: 99%

Effects of bedtime periocular and posterior cervical cutaneous warming on sleep status in adult male subjects: a preliminary study

Igaki

Suzuki

Sakamoto

et al. 2017

Sleep Biol. Rhythms

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Appropriate warming of the periocular or posterior cervical skin has been reported to induce autonomic or mental relaxation in humans. To clarify the effects of cutaneous warming on human sleep, eight male subjects with mild sleep difficulties were asked to try three experimental conditions at home, each lasting for 5 days, in a cross-over manner: warming of the periocular skin with a warming device for 10 min before habitual bedtime, warming of the posterior cervical skin with a warming device for 30 min before habitual bedtime, and no treatment as a control. The warming device had a heat- and steam-generating sheet that allowed warming of the skin to 40 °C through a chemical reaction with iron. Electroencephalograms (EEGs) were recorded during nocturnal sleep using an ambulatory EEG device and subjected to spectral analysis. All the participants reported their sleep status using a visual analog scale. We found that warming of the periocular or posterior cervical skin significantly improved subjective sleep status relative to the control. The EEG delta power density in the first 90 min of the sleep episode was significantly increased under both warming of the periocular or posterior cervical skin relative to the control. These results suggest that warming of appropriate skin regions may have favorable effects on subjective and objective sleep quality.

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Section: Discussionmentioning

confidence: 99%

Effects of bedtime periocular and posterior cervical cutaneous warming on sleep status in adult male subjects: a preliminary study

Igaki

Suzuki

Sakamoto

et al. 2017

Sleep Biol. Rhythms

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“…Our backward stepwise multiple linear regression analysis revealed that heat dissipation from the foot region was significantly associated with objective SOL, but that the changes in cardiac autonomic activities were not. Previously, it has also been reported that HRV was not associated with sleep initiation ( 39 ). Thus, although periocular skin warming can elicit a comfortable feeling and enhance parasympathetic tone, a reduction in the SOL induced by periocular warming might occur primarily through heat dissipation from distal skin regions.…”

Section: Discussionmentioning

confidence: 92%

Periocular Skin Warming Promotes Sleep Onset Through Heat Dissipation From Distal Skin in Patients With Insomnia Disorder

et al. 2022

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Study ObjectivesPeriocular skin warming before bedtime has been demonstrated to improve subjective sleep initiation in healthy adults with sleep difficulties scored six or higher in the Pittsburgh Sleep Questionnaire Index. This study aimed to investigate the effects of periocular skin warming on sleep initiation and thermoregulation processes in patients with insomnia disorder.MethodsParticipants included those with sleep difficulty (n = 22) and those with insomnia disorder (n = 16). Individuals from both groups were assessed at baseline (habitual sleep-wake schedule) and after two intervention conditions (use of a warming eye mask or a sham eye mask before habitual bedtime). The subjective and electroencephalographic sleep onset latency, along with proximal and distal skin temperature after periocular skin warming, were evaluated.ResultsPeriocular skin warming reduced objective sleep onset latency in independently of the group. Foot temperature and foot-proximal temperature gradient after getting into bed increased with periocular skin warming in independently of the group. However, the increase in hand temperature was observed only in the insomnia disorder group. Periocular skin warming also increased the normalized high frequency component of heart rate variability in independently of the group. The reduction of objective sleep onset latency was strongly associated with heat dissipation from the foot skin region.ConclusionThese results suggest that periocular skin warming promotes sleep initiation by enhancing heat dissipation from the distal skin regions in individuals with sleep difficulty and insomnia disorder. Periocular skin warming could thus be a novel non-pharmacological therapy for insomnia disorder.

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“…Sleep onset latency can vary with physical factors such as physical discomfort due to hunger [ 23 ], ambient temperature [ 24 ], and presence of sensory disturbances such as bright light [ 25 ] or loud sounds [ 26 ] as well as pathological causes or disease [ 27 ]. Among the latter, apart from pain [ 28 ], most of the causes are psychological, such as anxiety [ 29 ], depression [ 29 ], and psychological arousal associated with extreme joy [ 30 ], sorrow [ 31 ], or anger [ 12 ].…”

Section: Discussionmentioning

confidence: 99%

Ayurvedic Doshas as Predictors of Sleep Quality

et al. 2015

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BackgroundThe 3 Ayurvedic constitutional types or Doshas – vata, pitta, and kapha – are responsible for homeostasis and health. The doshas determine various functions, including sleep. According to the Ayurvedic texts, sleep is caused by increased kapha and insomnia by increased vata or pitta, which may follow physical or mental exertion, or disease. The present study was carried out to determine whether this relationship could be found using contemporary standardized questionnaires.Material/MethodsIn this cross-sectional single-group study, 995 persons participated (646 males; group average age ±S.D., 49.1±15.2 years). Participants were attending a 1-week residential yoga program in northern India. Participants were assessed for dosha scores using a Tridosha questionnaire and the quality of sleep in the preceding week was self-rated using a sleep rating questionnaire.ResultsMultiple linear regression analyses were used to determine if each dosha acted as a predictor of quality and quantity of sleep. Vata scores significantly predicted the time taken to fall asleep [p<0.01], and the feeling of being rested in the morning [p<0.001]; with higher vata scores being associated with a longer time to fall asleep and a lesser feeling of being rested in the morning. Kapha scores significantly predicted day-time somnolence [p<0.05] and the duration of day-time naps in minutes [p<0.05], with higher kapha scores being associated with longer day-time naps.ConclusionsThe results suggest that the doshas can influence the quality and quantity of sleep.

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A two-night comparison in the sleep laboratory as a tool to challenge the relationship between sleep initiation, cardiophysiological and thermoregulatory changes in women with difficulties initiating sleep and thermal discomfort

Cited by 9 publications

References 28 publications

Effects of bedtime periocular and posterior cervical cutaneous warming on sleep status in adult male subjects: a preliminary study

Effects of bedtime periocular and posterior cervical cutaneous warming on sleep status in adult male subjects: a preliminary study

Periocular Skin Warming Promotes Sleep Onset Through Heat Dissipation From Distal Skin in Patients With Insomnia Disorder

Ayurvedic Doshas as Predictors of Sleep Quality

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