scholarly journals REM Sleep: An Unknown Indicator of Sleep Quality

Author(s):  
Giuseppe Barbato

Standard polysomnographic analysis of sleep has not provided evidence of an objective measure of sleep quality; however, factors such as sleep duration and sleep efficiency are those more consistently associated with the subjective perception of sleep quality. Sleep reduction as currently occurs in our 24/7 society has had a profound impact on sleep quality; the habitual sleep period should fit within what is a limited nighttime window and may not be sufficient to satisfy the whole sleep process; moreover, the use of artificial light during the evening and early night hours can delay and disturb the circadian rhythms, especially affecting REM sleep. The correct phase relationship of the sleep period with the circadian pacemaker is an important factor to guarantee adequate restorative sleep duration and sleep continuity, thus providing the necessary background for a good night’s sleep. Due to the fact that REM sleep is controlled by the circadian clock, it can provide a window-like mechanism that defines the termination of the sleep period when there is still the necessity to complete the sleep process (not only wake-related homeostasis) and to meet the circadian end of sleep timing. An adequate amount of REM sleep appears necessary to guarantee sleep continuity, while periodically activating the brain and preparing it for the return to consciousness.

SLEEP ◽  
2017 ◽  
Vol 40 (suppl_1) ◽  
pp. A309-A310
Author(s):  
A Okuagu ◽  
K Granados ◽  
P Alfonso-Miller ◽  
O Buxton ◽  
S Patel ◽  
...  

2021 ◽  
Vol 12 ◽  
Author(s):  
Nikki Heinze ◽  
Syeda F. Hussain ◽  
Claire L. Castle ◽  
Lauren R. Godier-McBard ◽  
Theofilos Kempapidis ◽  
...  

Background: Research exploring the impact of the COVID-19 pandemic on sleep in people with disabilities has been scarce. This study provides a preliminary assessment of sleep in people with disabilities, across two timepoints during the pandemic, with a focus on those with visual impairment (VI).Methods: Two online surveys were conducted between April 2020 and March 2021 to explore sleep quality using the Pittsburgh Sleep Quality Index (PSQI). A convenience sample of 602 participants completed the first survey and 160 completed the follow-up survey.Results: Across both timepoints, participants with disabilities reported significantly poorer global sleep quality and higher levels of sleep disturbance, use of sleep medication and daytime dysfunction than those with no disabilities. Participants with VI reported significantly higher levels of sleep disturbance and use of sleep medication at both timepoints, poorer global sleep quality, sleep duration and latency at time 1, and daytime dysfunction at time 2, than those with no disabilities. Global sleep quality, sleep duration, sleep efficiency, and self-rated sleep quality deteriorated significantly in participants with no disabilities, but daytime dysfunction increased in all three groups. Disability and state anxiety were significant predictors of sleep quality across both surveys.Conclusion: While sleep was consistently poorer in people with disabilities such as VI, it appears that the COVID-19 pandemic has had a greater impact on sleep in people with no disabilities. State anxiety and, to a lesser extent, disability, were significant predictors of sleep across both surveys, suggesting the need to address anxiety in interventions targeted toward improving sleep.


SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A71-A71
Author(s):  
Luciana Giorgio ◽  
Carmela Alcantara

Abstract Introduction Although caregiving is associated with shorter sleep durations and worse sleep quality, particularly among employed individuals, these studies have mostly examined household (i.e., child, adult) and domestic caregiving among majority non-Latinx White samples. Sending remittances, a form of transnational caregiving whereby financial support is provided to relatives in one’s country of origin, is associated with positive mental health among Latinxs, yet its association with sleep remains unexamined. We examined the association of household and transnational caregiving with sleep duration and quality, and explored the moderating effects of employment status on these relationships. Methods Using cross-sectional data of healthy Latinx adults in New York City (N=188), we conducted separate age and gender-adjusted linear regressions or logistic regressions to examine the association of caregiving and sleep duration, and poor sleep quality, respectively. Sleep duration (continuous) and sleep quality (fairly/very poor) were measured using two items from the PSQI. Household caregiving was defined as caregiving for children or adults in the household. Transnational caregiving was operationalized as sending remittances. Moderation was tested using employment status*caregiving cross-products in adjusted models. Results Participants were Mage=37.61(SD=14.07), 71.3% employed, 66.5% female, and 59.6% immigrants. Overall, 14.9% were household caregivers and 28.72% sent remittances. Household caregiving was not significantly associated with sleep duration or quality. Those who sent remittances reported on average sleeping 27.63 minutes less than non-remitters (b=-27.63,SE=13.93,p<0.05). Sending remittances was associated with 2.30 increased odds of reporting poor sleep quality (OR:2.30; 95%CI:1.03-5.14.) Employment status was a significant moderator (p<0.05). Among those who were employed, sending remittances was associated with 3 times higher odds of poor sleep quality (OR:3.00;95%CI:1.46-10.59) and 48.94 fewer minutes of sleep duration than non-remitters (b=-48.94,SE=15.72,p<0.05). These relationships were not observed among unemployed Latinxs. Conclusion Transnational caregivers were more likely to report shorter sleep duration and poorer sleep quality than their counterparts, and this was only observed among employed vs. unemployed Latinxs. Household caregiving was not significantly associated with sleep. Employed transnational caregivers may have multiple jobs that further constrain opportunities for longer and high-quality sleep. Future studies should examine potential upstream factors (e.g., working conditions) that may limit employed, transnational caregivers’ ability to obtain adequate sleep. Support (if any):


Circulation ◽  
2018 ◽  
Vol 137 (suppl_1) ◽  
Author(s):  
Brooke Aggarwal ◽  
Adam M Brickman ◽  
Ming Liao ◽  
Molly E Zimmerman

Introduction: Poor cardiovascular health has been linked to an increased likelihood of cognitive impairment in older adults. Cognitive impairment has also been identified as an emerging co-morbidity of obstructive sleep apnea, a highly prevalent sleep disorder, particularly in patients with neurological conditions. Whether other aspects of sleep, including sleep duration, sleep quality, sleep onset latency, and insomnia are associated with cognition is not established. Objective: The aim of this study was to evaluate whether specific sleep patterns were associated with cognitive function in a diverse population of both younger and older, neurologically healthy women, and to determine whether this association is mediated by cardiovascular disease (CVD) risk factors. Methods: This was a baseline analysis of 392 women (59% racial/ethnic minority, mean age=39±16.53y, range 20-76y) participating in the ongoing American Heart Association Go Red for Women Strategically Focused Research Network population-based study at Columbia University Medical Center (CUMC). Cognitive function was assessed by the validated Montreal Cognitive Assessment (MoCA) screening instrument. Sleep duration, sleep quality, and time to sleep onset were assessed using the Pittsburgh Sleep Quality Index; insomnia was assessed using the Insomnia Severity Index. Blood lipids and glucose were measured in the biomarker core laboratory at CUMC. Multivariable linear regression models were used to evaluate associations between sleep, CVD risk factors, and MoCA scores, adjusted for age, race/ethnicity, education, health insurance, and tested for interactions between age and sleep. Results: The prevalence of abnormal MoCA (score <26) was 38%; mean scores were lower in adults ≥55y vs. <55y (p<0.0001), and racial/ethnic minorities vs. whites (p<0.0001). Average nightly sleep duration was 6.75±1.29 h, and 50% of women had poor sleep quality. In multivariable models testing for interactions, lower MoCA scores were associated with shorter sleep duration (p=0.007), worse quality sleep (p=0.0005), and higher insomnia level (p=0.04). In stratified analyses, associations between MoCA scores and sleep duration, sleep quality, and insomnia persisted among both younger (<55y) and older (≥55y) groups. Lower MoCA scores were also associated with higher triglycerides (p=0.0001) and lower HDL-cholesterol (p=0.0006); formal tests of mediation suggested that the relation between cognition and insomnia was mediated by triglyceride level. Conclusions: Poor sleep patterns were highly prevalent and associated with lower cognitive function, even in younger women in this diverse population. Sleep patterns should be further investigated as a potential mechanism to identify individuals at risk of cognitive decline. Whether the relation is causal or mediated through traditional CVD risk factors deserves further study.


Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1473
Author(s):  
Barbara D. Pachikian ◽  
Sylvie Copine ◽  
Marlène Suchareau ◽  
Louise Deldicque

A saffron extract has been found to be effective in the context of depression and anxiety, but its effect on sleep quality has not been investigating yet using objective approaches. For this purpose, a randomized double-blind controlled study was conducted in subjects presenting mild to moderate sleep disorder associated with anxiety. Sixty-six subjects were randomized and supplemented with a placebo (maltodextrin) or a saffron extract (15.5 mg per day) for 6 weeks. Actigraphy was used to collect objective data related to sleep quality at baseline, at the middle and at the end of the intervention. Sleep quality was also assessed by completion of the LSEQ and PSQI questionnaires and quality of life by completion of the SF-36 questionnaire. Six weeks of saffron supplementation led to an increased time in bed assessed by actigraphy, to an improved ease of getting to sleep evaluated by the LSEQ questionnaire and to an improved sleep quality, sleep latency, sleep duration, and global scores evaluated by the PSQI questionnaire, whereas those parameters were not modified by the placebo. In conclusion, those results suggest that a saffron extract could be a natural and safe nutritional strategy to improve sleep duration and quality.


2021 ◽  
Author(s):  
Bradley M Ritland ◽  
Jacob A Naylor ◽  
Alexxa F Bessey ◽  
Tina M Burke ◽  
Julie M Hughes ◽  
...  

ABSTRACT Introduction Musculoskeletal injuries and insufficient sleep are common among U.S. Army Rangers. There has been limited research into whether indices of sleep differ between injured and uninjured Rangers. The purpose of this study was to investigate the association between self-reported sleep and musculoskeletal injury in Rangers. Materials and Methods A total of 82 Army Rangers (male, 25.4 ± 4.0 years) were asked if they currently have any musculoskeletal injuries; completed the Pittsburgh Sleep Quality Index (PSQI), the Insomnia Severity Index (ISI), and the Stanford Sleepiness Scale; and were asked about their average sleep quality/sleep duration over the preceding week. Rangers were then dichotomized into groups, one that reported a current musculoskeletal injury and another that did not. Results The reported musculoskeletal injury prevalence was 15.9% (n = 13). The Rangers that reported an injury, compared to those that did not, had a significantly higher Global PSQI score (6.7 ± 3.7 versus 4.5 ± 2.7, P = .012) and ISI score (10.9 ± 3.7 versus 7.2 ± 4.1, P = .003), both indicative of poorer sleep. The group reporting an injury rated their average sleep quality over the preceding week significantly lower compared to those that did not report an injury (50.8 ± 17.5 versus 68.9 ± 18.3, P = .001). There was no significant group difference in the average nightly sleep duration (6.1 ± 1.0 hours versus 6.5 ± 0.9 hours, P = .099). Conclusion In this cohort of male Army Rangers, In this cohort of male Army Rangers, those with a musculoskeletal injury reported poorer sleep quality than uninjured Rangers. Sleep duration was not associated with reported injuries; however, both the injured group and uninjured group averaged less than the recommended amounts of sleep. Further investigation into the relationship between musculoskeletal injury and sleep in military personnel is warranted.


2019 ◽  
Vol 160 (32) ◽  
pp. 1279-1283
Author(s):  
Monica Iudita Maria Szabo ◽  
Beáta Máté ◽  
Attila Frigy

Abstract: Introduction: Short sleep duration and poor sleep quality may be associated with weight gain; this association has not yet been studied in Roma (Gipsy) population. Aim: Our aim was to study sleep patterns in two adult Roma subgroups (the wealthy Gabor and the poor Lovari Roma), compared to the majority of Hungarian population, in relation to obesity, knowing that Roma population has specific socio-cultural characteristics, with a rapidly changing lifestyle. Method: A population-based cross-sectional survey was conducted in a rural region in Transylvania, where the above groups are cohabiting. The groups were age- and gender-matched. Results: Sleep duration was 7.18 ± 1.6 hours in the Gabor Roma, 7.67 ± 1.5 hours in the Lovari Roma and 7.37 ± 1.5 hours in the non-Roma group. In average, 70% of them had enough sleep (≥7 hours). 38.6% of Gabor Roma, 27.1% of Lovari Roma and 23.5% of non-Roma had poor-quality sleep (p = 0.05). Gabor Roma had significantly higher body mass index (31.1 ± 4.6 versus 27.4 ± 5.2 and 28.66 ± 5.7 kg/m2, p = 0.004), and this correlated inversely with sleep duration (F = 14.85, p<0.000). Conclusion: Gabor Roma had significantly higher percentage of poor-quality sleep. Sleep duration and sleep quality were linked with obesity, mainly in the Roma population. Orv Hetil. 2019; 160(32): 1279–1283.


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