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Journal of Sleep Research

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https://www.readbyqxmd.com/read/28726307/naturally-occurring-circadian-rhythm-and-sleep-duration-are-related-to-executive-functions-in-early-adulthood
#1
Liisa Kuula, Anu-Katriina Pesonen, Kati Heinonen, Eero Kajantie, Johan Gunnar Eriksson, Sture Andersson, Aulikki Lano, Jari Lahti, Dieter Wolke, Katri Räikkönen
Experimental sleep deprivation studies suggest that insufficient sleep and circadian misalignment associates with poorer executive function. It is not known whether this association translates to naturally occurring sleep patterns. A total of 512 of full-term-born members of the Arvo Ylppö Longitudinal Study [mean age = 25.3, standard deviation (SD) = 0.65] (44.3% men) wore actigraphs to define sleep duration, its irregularity and circadian rhythm (sleep mid-point) during a 1-week period (mean 6.9 nights, SD = 1...
July 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28707304/actigraph-measures-of-sleep-among-female-hospital-employees-working-day-or-alternating-day-and-night-shifts
#2
Jill Korsiak, Joan Tranmer, Michael Leung, Michael M Borghese, Kristan J Aronson
Sleep disturbance is common among shift workers, and may be an important factor in the effect of shift work on chronic disease development. In this cross-sectional study, we described sleep patterns of 294 female hospital workers (142 alternating day-night shift workers, 152 day workers) and determined associations between shift work and sleep duration. Rest-activity cycles were recorded with the ActiGraph GT3X+ for 1 week. Analyses were stratified by chronotype of shift workers. Using all study days to calculate average sleep duration, shift workers slept approximately 13 min less than day workers during main sleep periods, while 24-h sleep duration did not differ between day workers and shift workers...
July 14, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28695622/sleep-disturbance-by-pramipexole-is-modified-by-meis1-in-mice
#3
Aaro V Salminen, Barbara Schormair, Cornelia Flachskamm, Miguel Torres, Bertram Müller-Myhsok, Mayumi Kimura, Juliane Winkelmann
Meis homeobox 1 (Meis1) is a transcription factor functioning in the development of the nervous system and the cardiovascular system. Both common and rare variants within the gene have been associated with restless legs syndrome (RLS), while its association with symptoms of insomnia has also been discovered recently. RLS is associated with sleep disturbances, and while Meis1 haploinsufficiency is one of the most promising strategies for an RLS animal model, sleep phenotyping of Meis1 knockout mice has never been conducted...
July 11, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28677325/memory-encoding-is-impaired-after-multiple-nights-of-partial-sleep-restriction
#4
James N Cousins, Karen Sasmita, Michael W L Chee
Sleep is important for normative cognitive functioning. A single night of total sleep deprivation can reduce the capacity to encode new memories. However, it is unclear how sleep restriction during several consecutive nights affects memory encoding. To explore this, we employed a parallel-group design with 59 adolescents randomized into sleep-restricted (SR) and control groups. Both groups were afforded 9 h time in bed (TIB) for 2 baseline nights, followed by 5 consecutive nights of 5 h TIB for the SR group (n = 29) and 9 h TIB for the control group (n = 30)...
July 5, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28664540/maintenance-diets-following-rapid-weight-loss-in-obstructive-sleep-apnea-a-pilot-1-year-clinical-trial
#5
Elizabeth A Cayanan, Nathaniel S Marshall, Camilla M Hoyos, Craig L Phillips, Yasmina Serinel, Keith K H Wong, Brendon J Yee, Ronald R Grunstein
Very low energy diets (VLED) appear to be the most efficacious dietary-based obesity reduction treatments in obstructive sleep apnea (OSA); however, effective weight loss maintenance strategies remain untested in this condition. Our study aimed to assess the feasibility, tolerability and efficacy of two common maintenance diets during a 10-month follow-up period after rapid weight loss using a 2-month VLED. In this two-arm, single-centre, open-label pilot trial, obese adult OSA patients received a 2-month VLED before being allocated to either the Australian Guide to Healthy Eating diet (AGHE) or a low glycaemic index high-protein diet (LGHP)...
June 30, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28656650/effects-of-signal-artefacts-on-electroencephalography-spectral-power-during-sleep-quantifying-the-effectiveness-of-automated-artefact-rejection-algorithms
#6
Jianbo Liu, Sridhar Ramakrishnan, Srinivas Laxminarayan, Maxwell Neal, David J Cashmere, Anne Germain, Jaques Reifman
Electroencephalography (EEG) recordings during sleep are often contaminated by muscle and ocular artefacts, which can affect the results of spectral power analyses significantly. However, the extent to which these artefacts affect EEG spectral power across different sleep states has not been quantified explicitly. Consequently, the effectiveness of automated artefact-rejection algorithms in minimizing these effects has not been characterized fully. To address these issues, we analysed standard 10-channel EEG recordings from 20 subjects during one night of sleep...
June 28, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28656632/serum-brain-derived-neurotrophic-factor-bdnf-in-sleep-disordered-patients-relation-to-sleep-stage-n3-and-rapid-eye-movement-rem-sleep-across-diagnostic-entities
#7
Michael Deuschle, Michael Schredl, Christian Wisch, Claudia Schilling, Maria Gilles, Olga Geisel, Rainer Hellweg
Experimental and clinical evidence suggests an association between neuroplasticity, brain-derived neurotrophic factor and sleep. We aimed at testing the hypotheses that brain-derived neurotrophic factor is associated with specific aspects of sleep architecture or sleep stages in patients with sleep disorders. We included 35 patients with primary insomnia, 31 patients with restless legs syndrome, 17 patients with idiopathic hypersomnia, 10 patients with narcolepsy and 37 healthy controls. Morning serum brain-derived neurotrophic factor concentrations were measured in patients and controls...
June 28, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28656615/a-pilot-study-of-a-novel-smartphone-application-for-the-estimation-of-sleep-onset
#8
Hannah Scott, Leon Lack, Nicole Lovato
The aim of the study was to investigate the accuracy of Sleep On Cue: a novel iPhone application that uses behavioural responses to auditory stimuli to estimate sleep onset. Twelve young adults underwent polysomnography recording while simultaneously using Sleep On Cue. Participants completed as many sleep-onset trials as possible within a 2-h period following their normal bedtime. On each trial, participants were awoken by the app following behavioural sleep onset. Then, after a short break of wakefulness, commenced the next trial...
June 28, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28643476/low-leptin-concentration-may-identify-heart-failure-patients-with-central-sleep-apnea
#9
Ivan Cundrle, Virend K Somers, Prachi Singh, Bruce D Johnson, Christopher G Scott, Lyle J Olson
Low leptin concentration has been shown to be associated with central sleep apnea in heart failure patients. We hypothesized that low leptin concentration predicts central sleep apnea. Consecutive ambulatory New York Heart Association (NYHA) classes I-IV heart failure patients were studied prospectively, including measurement of serum leptin, echocardiography and polysomnography. Sleep apnea was defined by type (central/mixed/obstructive) and by apnea-hypopnea index ≥5 by polysomnography. Subjects were divided into four groups by polysomnography: (1) central sleep apnea, (2) mixed apnea, (3) no apnea and (4) obstructive sleep apnea...
June 23, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28643350/habitual-sleep-and-kidney-function-in-chronic-kidney-disease-the-chronic-renal-insufficiency-cohort-study
#10
Kristen L Knutson, James Lash, Ana C Ricardo, James Herdegen, J D Thornton, Mahboob Rahman, Nicolas Turek, Janet Cohan, Lawrence J Appel, Lydia A Bazzano, Manjula K Tamura, Susan P Steigerwalt, Matthew R Weir, Eve Van Cauter
Physiological evidence suggests that sleep modulates kidney function. Our objective was to examine the cross-sectional association between kidney function and objectively-estimated habitual sleep duration, quality and timing in a cohort of patients with mild to moderate chronic kidney disease. This study involved two US clinical centers of the Chronic Renal Insufficiency Cohort (CRIC) study, including 432 participants in a CRIC ancillary sleep study. Habitual sleep duration, quality and timing were measured using wrist actigraphy for 5-7 days...
June 23, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28631309/obstructive-sleep-apnea-and-silent-cerebral-infarction-in-hypertensive-individuals
#11
José Alvarez-Sabín, Odile Romero, Pilar Delgado, Manuel Quintana, Estevo Santamarina, Alex Ferré, Olga Maisterra, Iolanda Riba-Llena, Joan Montaner, Gabriel Sampol
Obstructive sleep apnea syndrome is very prevalent in hypertensive subjects. Moreover, obstructive sleep apnea syndrome activates multiple processes that might be associated with silent cerebral infarct independently of established risk factors. Our aim is to estimate the frequency of obstructive sleep apnea syndrome in hypertensive patients with and without silent cerebral infarct, and to determine whether obstructive sleep apnea syndrome is an independent risk factor of silent cerebral infarct and/or lacunar silent cerebral infarct in patients with hypertension...
June 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28621018/sleep-structure-in-blindness-is-influenced-by-circadian-desynchrony
#12
Sébrina Aubin, Poul Jennum, Tore Nielsen, Ron Kupers, Maurice Ptito
We examined the structure, duration and quality of sleep, including non-rapid eye movement sleep and rapid eye movement sleep, in 11 blind individuals without conscious light perception and 11 age- and sex-matched sighted controls. Because blindness is associated with a greater incidence of free-running circadian rhythms, we controlled for circadian phase by a measure of melatonin onset timing. When circadian rhythm was entrained and melatonin onset occurred at normal times, sleep structure did not differ between blind and sighted individuals...
June 16, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28618185/let-s-talk-about-sleep-a-systematic-review-of-psychological-interventions-to-improve-sleep-in-college-students
#13
REVIEW
Anja Friedrich, Angelika A Schlarb
Sleep problems are a common occurrence in college students. Insomnia, nightmares and impaired sleep quality lead to several mental health issues, as well as impaired academic performance. Although different sleep programmes exist, a systematic overview comparing their effectiveness is still missing. This systematic review aims to provide an overview of psychological interventions to improve sleep in college students. Seven databases were searched from November to December 2016 (MEDLINE, EMBASE, PsycINFO, Cinahl, Cochrane Library, PubMed, OpenSigle)...
June 15, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28618114/subjective-insomnia-symptoms-and-sleep-duration-are-not-related-to-hypothalamic-pituitary-adrenal-axis-activity-in-older-adults
#14
Rian J G Peters van Neijenhof, Erik van Duijn, Julia F Van Den Berg, Margot W M de Waal, Roos C van der Mast, Hannie C Comijs
Insomnia symptoms are highly prevalent in depressed older adults. This study investigates the association between hypothalamic-pituitary-adrenal (HPA) axis activity and symptoms of insomnia, respectively, sleep duration among 294 depressed and 123 non-depressed older adults of the Netherlands Study of Depression in Older people (NESDO) study. Insomnia symptoms were defined as clinically relevant when having a score ≥ 10 points on the Women's Health Initiative Insomnia Rating Scale (WHIIRS). Sleep duration was categorized in short (≤ 6 h per night), normal (7-8 h per night) and long (≥ 9 h per night) duration...
June 15, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28593637/sleep-hygiene-behaviours-in-iranian-adolescents-an-application-of-the-theory-of-planned-behavior
#15
Carol Strong, Chung-Ying Lin, Shabnam Jalilolghadr, John A Updegraff, Anders Broström, Amir H Pakpour
Poor sleep quality and inadequate sleep in adolescents are a rising trend globally. The Theory of Planned Behaviour (TPB)-which centres on an individual's attitude toward performing the behaviour, subjective norms and perceived behavioural control-has been applied to examine sleep hygiene behaviours in young adults. We expanded on prior works by using a longitudinal design to examine the effects of TPB factors, together with sleep hygiene knowledge and planning constructs, on sleep hygiene behaviours and on sleep quality and health in a group of Iranian adolescents...
June 8, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28573658/an-approach-to-understanding-sleep-and-depressed-mood-in-adolescents-person-centred-sleep-classification
#16
Tamar Shochat, David H Barker, Katherine M Sharkey, Eliza Van Reen, Brandy M Roane, Mary A Carskadon
Depressive mood in youth has been associated with distinct sleep dimensions, such as timing, duration and quality. To identify discrete sleep phenotypes, we applied person-centred analysis (latent class mixture models) based on self-reported sleep patterns and quality, and examined associations between phenotypes and mood in high-school seniors. Students (n = 1451; mean age = 18.4 ± 0.3 years; 648 M) completed a survey near the end of high-school. Indicators used for classification included school night bed- and rise-times, differences between non-school night and school night bed- and rise-times, sleep-onset latency, number of awakenings, naps, and sleep quality and disturbance...
June 2, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28568911/dream-emotions-a-comparison-of-home-dream-reports-with-laboratory-early-and-late-rem-dream-reports
#17
Pilleriin Sikka, Antti Revonsuo, Nils Sandman, Jarno Tuominen, Katja Valli
The aim of this study was to compare the emotional content of dream reports collected at home upon morning awakenings with those collected in the laboratory upon early and late rapid eye movement (REM) sleep awakenings. Eighteen adults (11 women, seven men; mean age = 25.89 ± 4.85) wrote down their home dreams every morning immediately upon awakening during a 7-day period. Participants also spent two non-consecutive nights in the sleep laboratory where they were awoken 5 min into each continuous REM sleep stage, upon which they gave a verbal dream report...
June 1, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28568907/anticipated-next-day-demand-affects-the-magnitude-of-the-cortisol-awakening-response-but-not-subjective-or-objective-sleep
#18
Greg J Elder, Nicola L Barclay, Mark A Wetherell, Jason G Ellis
Whilst the association between sleep and stress is well established, few studies have examined the effects of an anticipated stressor upon sleep and relevant physiological markers. The aim of the present study was to examine whether an anticipated stressor in the form of next-day demand affects subjective and objective sleep, and multiple indices of the cortisol awakening response. Subjective and objective sleep and the cortisol awakening response were measured over three consecutive nights in 40 healthy adults in a sleep laboratory...
June 1, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28568319/narcolepsy-with-cataplexy-and-pregnancy-a-case-control-study
#19
Elena Calvo-Ferrandiz, Rosa Peraita-Adrados
This was a retrospective case-control study in 25 patients with narcolepsy with cataplexy and 75 women in the control group. Patients completed the questionnaire by Maurovich-Horvat et al. (J. Sleep Res., 2013, 22: 496-512). We personally interviewed 25 patients with narcolepsy with cataplexy using the administered questionnaire regarding conception, pregnancy, delivery, perinatal and breastfeeding periods. Patients with narcolepsy with cataplexy reported 59 pregnancies versus 164 in the control group. In 16 cases (27...
June 1, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28568314/greater-circadian-disadvantage-during-evening-games-for-the-national-basketball-association-nba-national-hockey-league-nhl-and-national-football-league-nfl-teams-travelling-westward
#20
Jonathan Roy, Geneviève Forest
We investigated the effects of a circadian disadvantage (i.e. playing in a different time zone) on the winning percentages in three major sport leagues in North America: the National Basketball Association, the National Hockey League and the National Football League. We reviewed 5 years of regular season games in the National Basketball Association, National Hockey League and National Football League, and noted the winning percentage of the visiting team depending on the direction of travel (west, east, and same time zone) and game time (day and evening games)...
June 1, 2017: Journal of Sleep Research
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