Within-person associations between racial microaggressions and sleep among African American and Latinx young adults.
Abstract Emerging work suggests that experiences of racial discrimination may impact overall sleep health; however, there is limited work on the link between racial microaggressions and sleep. Using weekly diary data, the current study examined young adults' weekly reports of racial microaggressions across 4 weeks, and their relation to weekly reports of sleep-onset latency, reduced total sleep time and poorer sleep quality. This design allowed us to examine how within-person fluctuations in racial microaggressions corresponded with young adults' sleep. Data were collected among 140 African American (62.1%) and ...
Source: Journal of Sleep Research - November 20, 2020 Category: Sleep Medicine Authors: Davenport MA, Landor AM, Zeiders KH, Sarsar ED, Flores M Tags: J Sleep Res Source Type: research

Does insufficient sleep affect how you learn from reward or punishment? Reinforcement learning after 2 nights of sleep restriction.
z J Abstract To learn from feedback (trial and error) is essential for all species. Insufficient sleep has been found to reduce the sensitivity to feedback as well as increase reward sensitivity. To determine whether insufficient sleep alters learning from positive and negative feedback, healthy participants (n = 32, mean age 29.0 years, 18 women) were tested once after normal sleep (8 hr time in bed for 2 nights) and once after 2 nights of sleep restriction (4 hr/night) on a probabilistic selection task where learning behaviour was evaluated in three ways: as generalised learnin...
Source: Journal of Sleep Research - November 20, 2020 Category: Sleep Medicine Authors: Gerhardsson A, Porada DK, Lundström JN, Axelsson J, Schwarz J Tags: J Sleep Res Source Type: research

Correspondence between physiological and behavioural responses to vibratory stimuli during the sleep onset period: A quantitative electroencephalography analysis.
Abstract Behavioural responses to auditory stimuli cease in late N1 or early N2 sleep. Yet, responsiveness to minimal intensity tactile stimuli and the correspondence with sleep microstructure during the sleep onset period is unknown. The aim of the present study was to investigate sleep microstructure using quantitative electroencephalography analysis when participants behaviourally responded to minimal intensity vibratory stimuli compared to when participants did not respond to stimuli during the sleep onset period. Eighteen participants wore a device that emitted vibratory stimuli to which individuals responded...
Source: Journal of Sleep Research - November 17, 2020 Category: Sleep Medicine Authors: Scott H, Lechat B, Lovato N, Lack L Tags: J Sleep Res Source Type: research

Profiles of sleep changes during the COVID-19 pandemic: Demographic, behavioural and psychological factors.
This study aimed to evaluate changes in sleep during the COVID-19 outbreak, and used data-driven approaches to identify distinct profiles of changes in sleep-related behaviours. Demographic, behavioural and psychological factors associated with sleep changes were also investigated. An online population survey assessing sleep and mental health was distributed between 3 April and 24 June 2020. Retrospective questions were used to estimate temporal changes from before to during the outbreak. In 5,525 Canadian respondents (67.1% females, 16-95 years old: Mean ± SD = 55.6 ± 16.3 years)...
Source: Journal of Sleep Research - November 17, 2020 Category: Sleep Medicine Authors: Robillard R, Dion K, Pennestri MH, Solomonova E, Lee E, Saad M, Murkar A, Godbout R, Edwards JD, Quilty L, Daros AR, Bhatla R, Kendzerska T Tags: J Sleep Res Source Type: research

Identification of the sleep-wake states in rats using the high-frequency activity of the electroencephalogram.
oro N, Escudero M Abstract The electroencephalographic signal constitutes the main sign classically used for the identification of states of alertness. However, activities in the high frequency (>100 Hz) range have not been properly studied despite their high potential for sleep scoring in rodents. In the present study, we designed a method for the identification of the sleep-wake states in rats by exclusively using high-frequency activities of the electroencephalogram. By calculating the ratio between the amplitude of the electroencephalographic signal from 110 to 200 Hz and from 110 to 300 Hz, ...
Source: Journal of Sleep Research - November 16, 2020 Category: Sleep Medicine Authors: Silva-Pérez M, Sánchez-López A, Pompa-Del-Toro N, Escudero M Tags: J Sleep Res Source Type: research

Sleep and circadian problems during the coronavirus disease 2019 (COVID-19) pandemic: the International COVID-19 Sleep Study (ICOSS).
Abstract This protocol paper describes the development of an international collaboration to survey several thousand adults from different countries around the world about their sleep during the coronavirus disease 2019 (COVID-19) pandemic. It is based on the development of a harmonised survey with 50 questions (106 different items) on sleep habits and sleep symptoms that permit comparability of information. The harmonised questionnaire may be used in anonymous cross-sectional surveys, and the instruments within the questionnaire may also be used in prospective studies and clinical studies. The aim was to develop a...
Source: Journal of Sleep Research - November 12, 2020 Category: Sleep Medicine Authors: Partinen M, Bjorvatn B, Holzinger B, Chung F, Penzel T, Espie CA, Morin CM, ICOSS-collaboration group Tags: J Sleep Res Source Type: research

A systematic review and meta-analysis of wind turbine noise effects on sleep using validated objective and subjective sleep assessments.
cic G Abstract Little is known about the potential impacts of wind turbine noise (WTN) on sleep. Previous research is limited to cross-sectional studies reporting anecdotal impacts on sleep using inconsistent sleep metrics. This meta-analysis sought to comprehensively review studies evaluating the impact of WTN using widely accepted and validated objective and subjective sleep assessments. Search terms included: "wind farm noise", "wind turbine noise", "wind turbine sound", "wind turbine noise exposure" AND "sleep". Only original articles published in English publi...
Source: Journal of Sleep Research - November 12, 2020 Category: Sleep Medicine Authors: Liebich T, Lack L, Hansen K, Zajamšek B, Lovato N, Catcheside P, Micic G Tags: J Sleep Res Source Type: research

Effects of 2.45 GHz Wi-Fi exposure on sleep-dependent memory consolidation.
Abstract Studies have reported that exposure to radiofrequency electromagnetic fields (RF-EMF) emitted by mobile telephony might affect specific sleep features. Possible effects of RF-EMF emitted by Wi-Fi networks on sleep-dependent memory consolidation processes have not been investigated so far. The present study explored the impact of an all-night Wi-Fi (2.45 GHz) exposure on sleep-dependent memory consolidation and its associated physiological correlates. Thirty young males (mean ± standard deviation [SD]: 24.1 ± 2.9 years) participated in this double-blind, randomiz...
Source: Journal of Sleep Research - November 9, 2020 Category: Sleep Medicine Authors: Bueno-Lopez A, Eggert T, Dorn H, Schmid G, Hirtl R, Danker-Hopfe H Tags: J Sleep Res Source Type: research

Ageing shift workers' sleep and working-hour characteristics after implementing ergonomic shift-scheduling rules.
;rmä M Abstract We studied whether implementing binding ergonomic shift-scheduling rules change ageing (≥45 years) social and healthcare employees' (mean age 52.5 years, 95% women) working-hour characteristics (e.g. weekly working hours, number and length of night shifts, and short shift intervals) and sleep. We compared an intervention group (n = 253) to a control group (n = 1,234) by survey responses (baseline 2007/2008, follow-up 2012) and objective working-hour characteristics (intervention group n = 159, control group n = 379) from 91 days precedi...
Source: Journal of Sleep Research - November 9, 2020 Category: Sleep Medicine Authors: Karhula K, Hakola T, Koskinen A, Lallukka T, Ojajärvi A, Puttonen S, Oksanen T, Rahkonen O, Ropponen A, Härmä M Tags: J Sleep Res Source Type: research

Adverse interaction effects of chronic and acute sleep deficits on spatial working memory but not on verbal working memory or declarative memory.
Abstract The accumulation of chronic sleep deficits combined with acute sleep loss is common in shift workers and increases the risk of errors and accidents. We investigated single and combined effects of chronic and acute sleep loss and recovery sleep on working memory performance (N-back task) and on overnight declarative memory recall (paired-associate lists) in 36 healthy participants. After baseline measurements, the chronic sleep restriction group (n = 21; mean [SD] age 26 [4] years) underwent 5 nights of sleep restriction (5-hr time in bed [TIB]), whereas the control group (n =...
Source: Journal of Sleep Research - November 9, 2020 Category: Sleep Medicine Authors: Hennecke E, Lange D, Steenbergen F, Fronczek-Poncelet J, Elmenhorst D, Bauer A, Aeschbach D, Elmenhorst EM Tags: J Sleep Res Source Type: research

B-waves are present in patients without intracranial pressure disturbances.
We present four patients without known structural neurological disease other than a coincidentally found unruptured intracranial aneurysm. One of the patients had experienced well-controlled epilepsy for several years, but was included because ICP under these conditions is unlikely to be abnormal. Following informed consent, all four patients had a telemetric ICP probe implanted during a prophylactic operation with closure of the aneurysm. They underwent overnight ICP monitoring with simultaneous polysomnography (PSG) sleep studies at 8 weeks after the operation. These patients exhibited nocturnal B-waves, but did not...
Source: Journal of Sleep Research - November 5, 2020 Category: Sleep Medicine Authors: Riedel CS, Martinez-Tejada I, Norager NH, Kempfner L, Jennum P, Juhler M Tags: J Sleep Res Source Type: research

Insomnia symptoms during pregnancy: A meta-analysis.
Abstract Reports of sleep disturbances are common during pregnancy, yet estimates of prevalence of insomnia symptoms during pregnancy vary widely. The goals of the current review were to summarize the existing data on prevalence of insomnia symptoms during pregnancy and to explore potential moderators, including trimester, gestational age, maternal age, symptoms of anxiety and symptoms of depression. A systematic search of PubMed, PsycInfo and Web of Science was conducted for articles published from inception up to June 2020. In total, 24 studies with a total of 15,564 participants were included in the analysis. T...
Source: Journal of Sleep Research - November 2, 2020 Category: Sleep Medicine Authors: Sedov ID, Anderson NJ, Dhillon AK, Tomfohr-Madsen LM Tags: J Sleep Res Source Type: research

Sleep-disrupting effects of nocturnal nursing interventions in intensive care unit patients: A systematic review.
vá K Abstract Patients staying in the intensive care unit (ICU) require constant monitoring and numerous nursing interventions performed as needed, irrespective of daytime or night-time. The disturbing effect of nocturnal nursing interventions and their contribution to sleep disruptions are unclear. The review analysed nocturnal nursing interventions, and their character, frequency and effects on sleep quality. The databases CINAHL, PubMed and Scopus were searched to identify and subsequently evaluate 19 studies (1,531 patients) meeting the algorithm used. Although nocturnal nursing interventions provided t...
Source: Journal of Sleep Research - October 31, 2020 Category: Sleep Medicine Authors: Locihová H, Axmann K, Žiaková K Tags: J Sleep Res Source Type: research

Associations between objective afternoon and evening physical activity and objective sleep in patients with fibromyalgia and insomnia.
This study examined whether actigraphic (Actiwatch-2, Philips Respironics) afternoon and evening activity and pain are associated with actigraphic sleep. Adults with FM and insomnia complaints (n = 160, mean age [Mage ] = 52, SD = 12, 94% female) completed 14 days of actigraphy. Activity levels (i.e., activity counts per minute) were recorded, and average afternoon/evening activity for intervals 12:00-3:00 PM, 3:00-6:00 PM and 6:00-9:00 PM was computed. Multiple linear regressions examined whether afternoon/evening activity, pain (daily evening diaries from 0 [no pain sensa...
Source: Journal of Sleep Research - October 29, 2020 Category: Sleep Medicine Authors: McGovney KD, Curtis AF, McCrae CS Tags: J Sleep Res Source Type: research

A preliminary investigation of the effects of short-duration, vigorous exercise following sleep restriction, fragmentation and extension on appetite and mood in inactive, middle-aged men.
Abstract This preliminary study aimed to investigate the effect of exercise on appetite and mood following multiple days of sleep disruption (restriction [RES], fragmentation [FRAG]) or sleep extension (EXT), compared to normal sleep (CONT) in inactive, middle-aged men. Nine men completed four randomised trials initiated by 3 nights (day 1-3) of CONT (6.5-8 hr), RES (4 hr), FRAG (6.5-8 hr, interrupted at 2-hr intervals) or EXT (10 hr). On day 4 between 08:30 and 11:00 hours, perceived appetite, food cravings, appetite-related hormones (acylated ghrelin, leptin, peptide tyrosine-tyrosine [P...
Source: Journal of Sleep Research - October 27, 2020 Category: Sleep Medicine Authors: Larsen P, Marino FE, Guelfi K, Duffield R, Skein M Tags: J Sleep Res Source Type: research

PTPRD as a candidate druggable target for therapies for restless legs syndrome?
This study aims to verify the effect of treatment with pramipexole on the PTPRD expression, as well as on the sleep pattern in an animal model for restless legs syndrome. For this, an animal model of sleep-related movement disorders (spontaneously hypertensive rats) was distributed in groups: (a) spontaneously hypertensive rats-control; (b) spontaneously hypertensive rats-pramipexole (0.125 mg kg-1 for 4 weeks). The analyses of PTPRD gene and protein expression were performed in the striatum and spinal cord by quantitative real-time polymerase chain reaction and indirect enzyme-linked immunosorbent assay, respe...
Source: Journal of Sleep Research - October 27, 2020 Category: Sleep Medicine Authors: Morais MA, Franco B, Holanda ASS, Simino LAP, Manconi M, Torsoni A, Esteves AM Tags: J Sleep Res Source Type: research

Validation of insomnia questionnaires in the general population: The Nord-Tr øndelag Health Study (HUNT).
Validation of insomnia questionnaires in the general population: The Nord-Trøndelag Health Study (HUNT). J Sleep Res. 2020 Oct 27;:e13222 Authors: Filosa J, Omland PM, Langsrud K, Hagen K, Engstrøm M, Drange OK, Knutsen AJ, Brenner E, Kallestad H, Sand T Abstract The primary aim was to validate questionnaire-based insomnia diagnoses from a modified Karolinska Sleep Questionnaire (KSQ) and the Insomnia Severity Index (ISI), by age category (65 years), against a semi-structured face-to-face interview. Secondary aims were to split validity by diagnostic certainty of the interview and t...
Source: Journal of Sleep Research - October 27, 2020 Category: Sleep Medicine Authors: Filosa J, Omland PM, Langsrud K, Hagen K, Engstrøm M, Drange OK, Knutsen AJ, Brenner E, Kallestad H, Sand T Tags: J Sleep Res Source Type: research

Sleep differentially impacts involuntary intrusions and voluntary recognitions of lab-analogue traumatic memories.
Abstract Despite the critical role of sleep in memory and emotion processing, large remains unknown regarding how sleep influences trauma-related symptoms arising from maladaptive memory/emotional processes, such as those among patients with post-traumatic stress disorder. Employing a trauma film paradigm, we investigated how post-trauma sleep versus sleep deprivation influenced involuntary intrusions and voluntary recognition of traumatic memories. Sixty participants were randomly assigned to sleep or total sleep deprivation group following experimental trauma induction. Participants were assessed with: (a) lab-b...
Source: Journal of Sleep Research - October 26, 2020 Category: Sleep Medicine Authors: Zeng S, Lau EYY, Li SX, Hu X Tags: J Sleep Res Source Type: research

Patient and caregiver perspectives on sleep in dialysis.
Abstract Sleep disturbances are common among patients receiving dialysis and are associated with an increased risk of mortality and morbidity, and impaired quality of life. Despite being highly prioritised by patients, sleep problems remain under-diagnosed and inadequately managed. The aim of the present study was to describe the perspectives of patients receiving dialysis and their caregivers on sleep. We extracted qualitative data on sleep from 26 focus groups, two international Delphi surveys, and two consensus workshops involving 644 patients and caregivers from 86 countries as part of the Standardised Outcome...
Source: Journal of Sleep Research - October 25, 2020 Category: Sleep Medicine Authors: De Silva I, Evangelidis N, Hanson CS, Manera K, Guha C, Scholes-Robertson N, Craig JC, Johnson D, Cho Y, Viecelli AK, Tong A, SONG-HD, SONG-PD initiative Tags: J Sleep Res Source Type: research

The effect of daily aerobic cycling exercise on sleep quality during inpatient cannabis withdrawal: A randomised controlled trial.
Abstract Sleep disturbance is a common symptom encountered by cannabis-dependent individuals abstaining from cannabis use. In the present study, we investigated the effect of daily aerobic cycling exercise versus control stretching on sleep quality during inpatient cannabis withdrawal in treatment-seeking dependent cannabis users. The protocol incorporated three consecutive phases: a 4-Day (4-Night) (at-home) 'Baseline' phase, a 6-Day (5-Night) 'Treatment' phase (within a 7-Day inpatient hospital stay) and a 3-Day (4-Night) (at-home) 'Post-Treatment' phase. Participants performed 35 min of monitored activity ...
Source: Journal of Sleep Research - October 19, 2020 Category: Sleep Medicine Authors: McCartney D, Isik AD, Rooney K, Arnold JC, Bartlett DJ, Murnion B, Richards E, Arkell TR, Lintzeris N, McGregor IS Tags: J Sleep Res Source Type: research

Optimising sleep and performance during night float: A systematic review of evidence and implications for graduate medical education trainees.
Abstract Graduate medical education (GME) training commonly requires residents and fellows to engage in night float shift work. This review aims to assess the effectiveness of interventions for trainees when preparing for, completing, and recovering from working night float shifts. We reviewed all available studies published prior to September 2019 using PubMed, Scopus, CINAHL, the Cochrane library, PsycINFO, and Google Scholar databases. We included all original, primary research articles assessing either non-pharmacological or pharmacological interventions on the chronobiological and physiological effects of nig...
Source: Journal of Sleep Research - October 15, 2020 Category: Sleep Medicine Authors: Sholtes D, Kravitz HM, Deka A, Westrick J, Fogg LF, Gottlieb M Tags: J Sleep Res Source Type: research

Relationship between sleep efficacy endpoints and measures of functional status and health-related quality of life in participants with narcolepsy or obstructive sleep apnea treated for excessive daytime sleepiness.
This study examined the correlation between improvements in excessive daytime sleepiness in participants with obstructive sleep apnea or narcolepsy and changes in functional status, work productivity and health-related quality of life. Data from two 12-week randomized controlled trials of solriamfetol were analyzed. Participants completed the Epworth Sleepiness Scale, 10-item Functional Outcomes of Sleep Questionnaire, Work Productivity and Activity Impairment questionnaire and 36-Item Short Form Health Survey and performed the Maintenance of Wakefulness Test at baseline and weeks 4, 8 and 12. Patient Global Impression of ...
Source: Journal of Sleep Research - October 13, 2020 Category: Sleep Medicine Authors: Weaver TE, Mathias SD, Crosby RD, Bron M, Bujanover S, Menno D, Villa KF, Drake C Tags: J Sleep Res Source Type: research

Objectively measured sleep fragmentation is associated with incident delirium in older hospitalized patients: Analysis of data collected from an randomized controlled trial.
Abstract Delirium may lead to poor outcomes in hospitalized older adults, and sleep deprivation may contribute to its pathogenesis. Thus, we sought to measure sleep duration and fragmentation using wrist-worn actigraphy in older, hospitalized patients with and without delirium, and to determine if actigraphy-based parameters could be used to predict delirium prior to clinical recognition. We conducted a secondary analysis of data from a recent, randomized clinical trial aimed at preventing inpatient delirium. Participants (n = 70) were aged ≥ 65 years admitted to an internal medicine servi...
Source: Journal of Sleep Research - October 13, 2020 Category: Sleep Medicine Authors: Jaiswal SJ, Kang DY, Wineinger NE, Owens RL Tags: J Sleep Res Source Type: research

Temporal association between objectively measured smartphone usage, sleep quality and physical activity among Chinese adolescents and young adults.
Abstract We studied the association between objectively measured smartphone usage and objectively measured sleep quality and physical activity for seven consecutive days among Hong Kong adolescents and young adults aged 11-25 years (n = 357, 67% female). We installed an app that tracked the subjects' smartphone usage and had them wear an ActiGraph GT3X accelerometer on their wrist to measure their sleep quality and physical activity level. Smartphone usage data were successfully obtained from 187 participants (52.4%). The participants on average spent 2 h 46 min per day on their smartphone...
Source: Journal of Sleep Research - October 13, 2020 Category: Sleep Medicine Authors: Lee PH, Tse ACY, Wu CST, Mak YW, Lee U Tags: J Sleep Res Source Type: research

Longitudinal relations between sleep and cognitive functioning in children: Self-esteem as a moderator.
Abstract Short and poor-quality sleep disrupt cognitive functioning, yet associations vary across studies, underscoring the importance of examining individual differences and moderators of risk. Utilizing a multi-method, two-wave longitudinal design, we examined self-esteem as a moderator of relations between actigraphy-derived sleep duration (minutes) and quality (efficiency, long-wake episodes) and children's cognitive functioning 1 year later. During the first study wave (T1), participants were 243 children (47% female) with a mean age of 10.4 years (SD = 8.0 months). The sample was repres...
Source: Journal of Sleep Research - October 9, 2020 Category: Sleep Medicine Authors: Saini EK, Gillis BT, Elmore-Staton L, Buckhalt JA, El-Sheikh M Tags: J Sleep Res Source Type: research

Severe paediatric obesity and sleep: A mutual interactive relationship!
Abstract Childhood severe obesity is a serious, urgent and complex global health problem with long-term co-morbidities. Obstructive sleep-disordered breathing is more common in obese children and adolescents. Increased body mass index is associated with an increase in apnea-hypopnea index. Obstructive sleep apnea leads to a decrease in rapid eye movement sleep, and obese children have been noted to have a decrease in rapid eye movement sleep, leading to weight gain. Short sleep duration and poor sleep quality are associated with childhood obesity and cardiometabolic risks. Public health strategies for obesity prev...
Source: Journal of Sleep Research - October 7, 2020 Category: Sleep Medicine Authors: Ischander MM, Lloyd RD Tags: J Sleep Res Source Type: research

Telehealth-delivered CBT-I programme enhanced by acceptance and commitment therapy for insomnia and hypnotic dependence: A pilot randomized controlled trial.
Abstract Cognitive behavioural therapy for insomnia is the recommended treatment for chronic insomnia. However, up to a quarter of patients dropout from cognitive behavioural therapy for insomnia programmes. Acceptance, mindfulness and values-based actions may constitute complementary therapeutic tools to cognitive behavioural therapy for insomnia. The current study sought to evaluate the efficacy of a remotely delivered programme combining the main components of cognitive behavioural therapy for insomnia (sleep restriction and stimulus control) with the third-wave cognitive behavioural therapy acceptance and comm...
Source: Journal of Sleep Research - October 4, 2020 Category: Sleep Medicine Authors: Chapoutot M, Peter-Derex L, Schoendorff B, Faivre T, Bastuji H, Putois B Tags: J Sleep Res Source Type: research

Focus on sleep, insomnia and mental health.
PMID: 32918798 [PubMed - in process] (Source: Journal of Sleep Research)
Source: Journal of Sleep Research - September 15, 2020 Category: Sleep Medicine Authors: Riemann D Tags: J Sleep Res Source Type: research

Behavioural and emotional profiles of children and adolescents with disorders of arousal.
Abstract Disorders of arousals are common sleep disorders characterized by complex motor behaviours that arise episodically out of slow-wave sleep. Psychological distress has long been associated with disorders of arousal, but this link remains controversial, especially in children and adolescents. The aim of this multi-centre study was to characterize behavioural and emotional problems in a sample of children/adolescents with disorders of arousal, and to explore their relationship with the severity of nocturnal episodes. The parents of 41 children/adolescents with a diagnosis of disorders of arousa...
Source: Journal of Sleep Research - September 9, 2020 Category: Sleep Medicine Authors: Castelnovo A, Turner K, Rossi A, Galbiati A, Gagliardi A, Proserpio P, Nobili L, Terzaghi M, Manni R, Ferini Strambi L, Manconi M, Miano S, Zambrelli E, Paola Canevini M Tags: J Sleep Res Source Type: research

Sleep inhibition induced by amyloid- β oligomers is mediated by the cellular prion protein.
Sleep inhibition induced by amyloid-β oligomers is mediated by the cellular prion protein. J Sleep Res. 2020 Sep 09;:e13187 Authors: Del Gallo F, Bianchi S, Bertani I, Messa M, Colombo L, Balducci C, Salmona M, Imeri L, Chiesa R Abstract Sleep is severely impaired in patients with Alzheimer's disease. Amyloid-β deposition in the brain of Alzheimer's disease patients is a key event in its pathogenesis and is associated with disrupted sleep, even before the appearance of cognitive decline. Because soluble amyloid-β oligomers are the key mediators of synaptic and cognitive dysfunction in A...
Source: Journal of Sleep Research - September 8, 2020 Category: Sleep Medicine Authors: Del Gallo F, Bianchi S, Bertani I, Messa M, Colombo L, Balducci C, Salmona M, Imeri L, Chiesa R Tags: J Sleep Res Source Type: research

Insomnia symptoms and non-suicidal self-injury in adolescence: understanding temporal relations and mechanisms.
Abstract We propose a theoretical model of insomnia symptoms and non-suicidal self-injury (NSSI) that posits bidirectional linkages. We hypothesised that heightened depressive symptoms and impulsivity that result from insomnia increase NSSI. We also posit that the shame associated with NSSI triggers repetitive negative thinking, in turn increasing insomnia. Using three longitudinal waves of questionnaire data collected annually from a sample of Swedish adolescents (n = 1,457; Mage  = 13.2, SD = 0.43; 52.7% boys), we assessed the mediating role of depressive symptoms, impulsivity, rumi...
Source: Journal of Sleep Research - September 6, 2020 Category: Sleep Medicine Authors: Latina D, Bauducco S, Tilton-Weaver L Tags: J Sleep Res Source Type: research

Prospective relations between sleep in preschool years and academic achievement at school entry.
te-Gagné C Abstract It is often assumed that adequate sleep is a key ingredient of children's school success. Research to date, however, suggests modest associations between child sleep and academic achievement. Adopting a developmental perspective, this report investigates the associations between age-related changes in sleep across the preschool period and academic achievement at school entry. Sleep was assessed by actigraphy at ages 2, 3 and 4 among 128 children from mostly White middle-class families, and their performance in reading and mathematics was tested in Grade 1. The results revealed that child...
Source: Journal of Sleep Research - September 5, 2020 Category: Sleep Medicine Authors: Bernier A, Cimon-Paquet C, Tétreault É, Carrier J, Matte-Gagné C Tags: J Sleep Res Source Type: research

Integration of waking experience through dreams considered in light of individual differences in implicit learning ability.
Abstract The present study explored whether individual differences in implicit learning were related to the incorporation of waking events into dreams. Participants (N = 60) took part in a sequence learning task, a measure of implicit learning ability. They were then asked to keep a record of their waking experiences (personally significant events [PSEs]/major concerns), as well as their nightly dreams for a week. Of these, the responses of 51 participants were suitable for further analysis in which participants themselves and three independent judges rated the correlation between waking events and dream...
Source: Journal of Sleep Research - September 1, 2020 Category: Sleep Medicine Authors: Wang J, Li X, He J, Ma H, Bin T, Wan J, Feng X, Zemmelman S, Shen H Tags: J Sleep Res Source Type: research

Influence of age and gender on sleep bruxism and snoring in non-apneic snoring patients: A polysomnographic study.
Abstract The present study aimed to assess the influence of gender and age on snoring and sleep bruxism in non-apneic snoring patients. Adult participants with clinical suspicion of snoring and with no other significant medical history were recruited. Single-night video polysomnography was performed to detect snoring and sleep bruxism. Finally, 137 snoring non-apneic participants were included. Statistical analysis of gender groups showed that the total snore index and snore train were significantly higher in men than in women. Men also presented severe bruxism, with significantly more frequent episodes and higher...
Source: Journal of Sleep Research - August 31, 2020 Category: Sleep Medicine Authors: Smardz J, Wieckiewicz M, Gac P, Poreba R, Wojakowska A, Mazur G, Martynowicz H Tags: J Sleep Res Source Type: research

Could sleep paralysis be pleasant?
ron;ková J Abstract Sleep paralysis is an inability to move at sleep onset or upon awakening. It is often a distressing experience that can be associated with significant clinical consequences. Few studies have focussed on pleasant sleep paralysis episodes. The present study aimed to determine the relative prevalence of pleasant episodes of sleep paralysis as well as variables that may make them more likely to occur. Participants (N = 172) with recurrent episodes of sleep paralysis completed a battery of questionnaires investigating sleep paralysis episodes, trauma symptoms, life satisfaction, and...
Source: Journal of Sleep Research - August 30, 2020 Category: Sleep Medicine Authors: Kliková M, Sharpless BA, Bušková J Tags: J Sleep Res Source Type: research

Disruption of neocortical synchronisation during slow-wave sleep in the rotenone model of Parkinson's disease.
a MMS Abstract Parkinson's disease motor dysfunctions are associated with improperly organised neural oscillatory activity. The presence of such disruption at the early stages of the disease in which altered sleep is one of the main features could be a relevant predictive feature. Based on this, we aimed to investigate the neocortical synchronisation dynamics during slow-wave sleep (SWS) in the rotenone model of Parkinson's disease. After rotenone administration within the substantia nigra pars compacta, one group of male Wistar rats underwent sleep-wake recording. Considering the association between SWS oscillato...
Source: Journal of Sleep Research - August 30, 2020 Category: Sleep Medicine Authors: Dos Santos Lima GZ, Targa ADS, de Freitas Cavalcante S, Rodrigues LS, Fontenele-Araújo J, Torterolo P, Andersen ML, Lima MMS Tags: J Sleep Res Source Type: research

Nocturnal eye movements in patients with idiopathic rapid eye movement sleep behaviour disorder and patients with Parkinson's disease.
Abstract Patients with idiopathic rapid-eye-movement (REM) sleep behaviour disorder (iRBD) have a high risk of converting into manifest α-synucleinopathies. Eye movements (EMs) are controlled by neurons in the lower brainstem, midbrain and frontal areas, and may be affected by the early neurodegenerative process seen in iRBD. Studies have reported impairment of the oculomotor function in patients with Parkinson's disease (PD) during wakefulness, but no studies have investigated EMs during sleep. We aimed to evaluate nocturnal EMs in iRBD and PD, hypothesizing that these patients present abnormal EM distribut...
Source: Journal of Sleep Research - August 27, 2020 Category: Sleep Medicine Authors: Christensen JAE, Cesari M, Pizza F, Antelmi E, Frandsen RAV, Plazzi G, Jennum P Tags: J Sleep Res Source Type: research

Sleep-disordered breathing in patients with stroke-induced dysphagia.
This study examined the nature and characteristics of sleep-disordered breathing, including obstructive sleep apnea and central sleep apnea, in patients with post-stroke dysphagia, to determine the demographic, anthropometric and clinical variables that were associated with sleep-disordered breathing. Thirty-nine patients diagnosed with acute stroke (28 males and 11 females with a mean age of 72.3 ± 10.0 years) underwent overnight polysomnography (within 3.9 ± 1.6 days after admission). Sleep-disordered breathing was described by the apnea-hypopnea index and its obstructive and c...
Source: Journal of Sleep Research - August 26, 2020 Category: Sleep Medicine Authors: Estai M, Walsh J, Maddison K, Shepherd K, Hillman D, McArdle N, Baker V, King S, Al-Obaidi Z, Bamagoos A, Parry R, Langdon C, Trzaskowski R, Harris G, Brookes K, Blacker D, Eastwood PR Tags: J Sleep Res Source Type: research

Groping in the dark: A response to Roger Ekirch.
PMID: 32841432 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research)
Source: Journal of Sleep Research - August 24, 2020 Category: Sleep Medicine Authors: Verhoeven G Tags: J Sleep Res Source Type: research

Thalamic and neocortical differences in the relationship between the time course of delta and sigma power during NREM sleep in humans.
Abstract Sleep spindles and slow waves are the hallmarks of non-rapid eye movement (NREM) sleep and are produced by the dynamic interplay between thalamic and cortical regions. Several studies in both human and animal models have focused their attention on the relationship between electroencephalographic (EEG) spindles and slow waves during NREM, using the power in the sigma and delta bands as a surrogate for the production of spindles and slow waves. A typical report is an overall inverse relationship between the time course of sigma and delta power as measured by a single correlation coefficient both within and ...
Source: Journal of Sleep Research - August 23, 2020 Category: Sleep Medicine Authors: Sarasso S, Zubler F, Pigorini A, Sartori I, Castana L, Nobili L Tags: J Sleep Res Source Type: research

How does cessation of work affect sleep? Prospective analyses of sleep duration, timing and efficiency from the Swedish Retirement Study.
Abstract Several strands of research indicate that work competes for time with sleep, but to what extent the timing and duration of sleep is affected by work is not known. Retirement offers a quasi-experimental life transition to study this in a within-individual study design. The few existing studies report that people sleep longer and later after retirement but mainly rely on self-reported data or between-individual analyses. We recruited 100 participants aged 61-72 years who were in paid work but would soon retire and measured them in a baseline week with accelerometers, diaries and questionnaires. Af...
Source: Journal of Sleep Research - August 18, 2020 Category: Sleep Medicine Authors: Garefelt J, Gershagen S, Kecklund G, Westerlund H, Platts LG Tags: J Sleep Res Source Type: research

Cardiac autonomic control during non-REM and REM sleep stages in paediatric patients with Prader-Willi syndrome.
In conclusion, this group of paediatric patients with PWS had impaired cardiac autonomic balance due to reduced parasympathetic modulation during SWS. This result could imply an underlying increased cardiovascular risk in PWS even during early age and independent of obesity. PMID: 32812310 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research)
Source: Journal of Sleep Research - August 17, 2020 Category: Sleep Medicine Authors: Brito LC, Queiroga T, Franco RR, Passone CGB, Lopes MC, Shea SA, Bueno C, Soster LMSFA Tags: J Sleep Res Source Type: research

Insomnia as a mediating therapeutic target for depressive symptoms: A sub-analysis of participant data from two large randomized controlled trials of a digital sleep intervention.
We examined the effects of a fully-automated digital cognitive behavioural therapy intervention for insomnia (Sleepio) on insomnia and depressive symptoms, and the mediating role of sleep improvement on depressive symptoms in participants from two randomized controlled trials of digital cognitive behavioural therapy for insomnia. We also explored potential moderators of intervention effects. All participants met criteria for probable insomnia disorder and had clinically significant depressive symptomatology (PHQ-9 ≥ 10; n = 3,352). Individuals allocated to treatment in both trials were provided acces...
Source: Journal of Sleep Research - August 17, 2020 Category: Sleep Medicine Authors: Henry AL, Miller CB, Emsley R, Sheaves B, Freeman D, Luik AI, Littlewood DL, Saunders KEA, Kanady JC, Carl JR, Davis ML, Kyle SD, Espie CA Tags: J Sleep Res Source Type: research

Sleep duration trajectories from adolescence to emerging adulthood: Findings from a population-based birth cohort.
This study aimed to describe longitudinal trajectories of sleep duration, among adolescents and adults from the Pelotas (Brazil) 1993 Birth Cohort, as well as characterize different trajectories groups according to socioeconomic, demographic and behavior characteristics. Sleep duration, hours per day (from Monday to Friday), bedtime and wake-up time were self-reported by participants at ages 11, 18 and 22 years. Covariables included socioeconomic, demographic, health and behavior characteristics. Trajectory analysis was performed using a semi-parametric, group-based modelling approach. Prevalence and 95% confidence in...
Source: Journal of Sleep Research - August 16, 2020 Category: Sleep Medicine Authors: Kramer Fiala Machado A, Wendt A, Baptista Menezes AM, Gonçalves H, Wehrmeister FC Tags: J Sleep Res Source Type: research

Systematic decrease of slow-wave sleep after a guided imagery designed to deepen sleep in low hypnotizable subjects.
Abstract Slow-wave sleep is one of the most important restorative components of sleep and central for our health and cognitive functioning. Although the amount of slow-wave sleep depends on sleep drive, age and other factors, also the pre-sleep mental state might influence sleep depth. We had shown that a pre-sleep hypnotic suggestion to sleep more deeply increased slow-wave sleep duration in hypnotizable subjects. In contrast, low-hypnotizable participants decreased sleep depth after this intervention. A possible reason might be an aversion to and active resistance against hypnosis. To overcome this potential opp...
Source: Journal of Sleep Research - August 16, 2020 Category: Sleep Medicine Authors: Cordi MJ, Rasch B Tags: J Sleep Res Source Type: research

CARDIAC chronotropic effects of sleep-disordered breathing in patients with heart failure.
Abstract It is still not known whether the oscillation in heart rate (HR) induced by sleep-disordered breathing (SDB) in patients with heart failure entails significant chronotropic effects. We hypothesised that since cyclical changes in ventilation and arterial blood gases during SDB affect HR through multiple and complexly interacting mechanisms characterised by large inter-subject variability, chronotropic effects may change from patient to patient. A total of 42 patients with moderate-to-severe chronic heart failure with systolic dysfunction underwent an in-hospital sleep study. Chronotropic effects of SDB wer...
Source: Journal of Sleep Research - August 12, 2020 Category: Sleep Medicine Authors: Pinna GD, La Rovere MT, Robbi E, Tavazzi L, Maestri R Tags: J Sleep Res Source Type: research

Impact of obstructive sleep apnoea on cognitive function in multiple sclerosis: A longitudinal study.
Abstract Cognitive impairment (CI) and fatigue are common in people with multiple sclerosis (MS), with well-known profound effects on quality of life. Sleep disorders, including obstructive sleep apnoea (OSA), are also common in MS patients. The presence of CI has previously been shown to strongly correlate with OSA diagnosed using polysomnography in MS. Treatment of OSA has not previously been investigated as a potential modality to improve cognition in MS patients. Therefore, we sought to investigate the potential effects of OSA treatment on both cognitive function and fatigue in MS patients. Twenty-three partic...
Source: Journal of Sleep Research - August 12, 2020 Category: Sleep Medicine Authors: McNicholas N, Russell A, Nolan G, Tubridy N, Hutchinson M, Garvey JF, McGuigan C Tags: J Sleep Res Source Type: research

A network meta-analysis of different positive airway pressure interventions in obesity hypoventilation syndrome.
Abstract Continuous positive airway pressure (CPAP) and different types of non-invasive ventilation (NIV) have been studied in obesity hypoventilation syndrome such as bi-level PAP with back-up rate (BPAP-BUR), BPAP without BUR, and the new hybrid devices that target a pre-set volume by adjustment of pressure support (VT-PS). Although several studies have compared one PAP intervention with the other, none has compared all four in a head-to-head design, which formed the basis of this network meta-analysis. PubMed and Web of Science were searched for potentially includable randomised active comparator trials. Change...
Source: Journal of Sleep Research - August 11, 2020 Category: Sleep Medicine Authors: Iftikhar IH, Greer M, Wigger GW, Collop NA Tags: J Sleep Res Source Type: research

Childhood restless legs syndrome: A longitudinal study of prevalence and familial aggregation.
The objectives of this study were to assess the prevalence of restless legs syndrome (RLS) during childhood and adolescence in a large population-based cohort and evaluate the degree of association with parental history. Data from a large, prospective longitudinal cohort from the Quebec Longitudinal Study of Child Development of 1,856 children born in 1997-1998 were studied from 2005 to 2013. The prevalence of RLS was assessed at ages 7, 8, 12, 13 and 15 years through a questionnaire completed by the mother. Parental history of RLS was also queried. Between 7 and 15 years of age, the yearly prevalence of RLS rang...
Source: Journal of Sleep Research - August 10, 2020 Category: Sleep Medicine Authors: Pennestri MH, Petit D, Paquet J, Desautels A, Touchette E, Côté S, Tremblay RE, Boivin M, Montplaisir J Tags: J Sleep Res Source Type: research

Self-reported sleep quality is more closely associated with mental and physical health than chronotype and sleep duration in young adults: A multi-instrument analysis.
Abstract Sleep and circadian rhythms are considered to be important determinants of mental and physical health. Epidemiological studies have established the contribution of self-reported sleep duration, sleep quality and chronotype to health outcomes. Mental health and sleep problems are more common in women and men are more likely to be evening types. Few studies have compared the relative strength of these contributions and few studies have assessed these contributions separately in men and women. Furthermore, sleep and circadian characteristics are typically assessed with a limited number of instruments and a n...
Source: Journal of Sleep Research - August 10, 2020 Category: Sleep Medicine Authors: Muzni K, Groeger JA, Dijk DJ, Lazar AS Tags: J Sleep Res Source Type: research