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Journal of Sleep Research

Cheryl R Laratta, Willis H Tsai, James Wick, Sachin R Pendharkar, Kerri A Johannson, Paul E Ronksley
Obstructive sleep apnea (OSA) is a common condition associated with significant morbidity and health-care utilization. We determined the validity of an algorithm derived from administrative data for identifying OSA using the respiratory disturbance index (RDI) as the reference standard. We conducted a retrospective cohort study of adults in Alberta, Canada referred for facility and community-based sleep diagnostic testing between July 2005 and August 2007. Validity indices were estimated for several case definitions of OSA derived from outpatient physician billing claims and hospital discharge codes...
October 20, 2016: Journal of Sleep Research
Marija Bakotic, Biserka Radosevic-Vidacek, Adrijana Koscec Bjelajac
The aim of this study was to explore the mediating role of sleep characteristics in the relationship between morningness-eveningness and three different aspects of daytime functioning: daytime sleepiness, depressive mood and substance use in university students. A multiple mediator model was proposed with sleep debt, poor sleep quality and bedtime delay at weekends as parallel mediators in these relationships. We analysed the data of 1052 university students aged 18-25 years who completed a modified version of the School Sleep Habits Survey, which included questions on sleep and the Composite Scale of Morningness, Sleepiness Scale, Depressive Mood Scale and Substance Use Scale...
October 19, 2016: Journal of Sleep Research
Andrew Mccarthy, Sally Loomis, Brian Eastwood, Keith A Wafford, Raphaëlle Winsky-Sommerer, Gary Gilmour
While several methods have been used to restrict the sleep of experimental animals, it is often unclear whether these different forms of sleep restriction have comparable effects on sleep-wake architecture or functional capacity. The present study compared four models of sleep restriction, using enforced wakefulness by rotation of cylindrical home cages over 11 h in male Wistar rats. These included an electroencephalographic-driven 'Biofeedback' method and three non-invasive methods where rotation was triggered according to a 'Constant', 'Decreasing' or random protocol based upon the 'Weibull' distribution fit to an archival Biofeedback dataset...
October 14, 2016: Journal of Sleep Research
Mohammad K A Khan, Erin L Faught, Yen Li Chu, John P Ekwaru, Kate E Storey, Paul J Veugelers
Both diet quality and sleep duration of children have declined in the past decades. Several studies have suggested that diet and sleep are associated; however, it is not established which aspects of the diet are responsible for this association. Is it nutrients, food items, diet quality or eating behaviours? We surveyed 2261 grade 5 children on their dietary intake and eating behaviours, and their parents on their sleep duration and sleep quality. We performed factor analysis to identify and quantify the essential factors among 57 nutrients, 132 food items and 19 eating behaviours...
October 13, 2016: Journal of Sleep Research
Elsa N Mullins, Alison L Miller, Sherin S Cherian, Julie C Lumeng, Kenneth P Wright, Salome Kurth, Monique K Lebourgeois
Epidemiological findings suggest short sleep duration is associated with overweight and obesity across the lifespan. In adults, experimental sleep loss increases caloric intake more than total daily energy needs, thus leading to weight gain. To date, little is known about the relationship between sleep restriction and dietary intake in preschool children. Healthy children (n = 10; 41.2 ± 5.4 months; 5 females) followed a strict sleep schedule for 5 days before each experimental condition: 1 day of baseline sleep (nap and scheduled bedtime/wake time) and 1 day of sleep restriction (no-nap and ~2...
September 19, 2016: Journal of Sleep Research
Elaine van Rijn, Carlo Lucignoli, Cristina Izura, Mark T Blagrove
Although many types of newly encoded information can be consolidated during sleep, an enhanced effect has been found for memories tagged as relevant to the future, such as through knowledge of future testing or payment for successful recall. In the current study, participants (n = 80) learned Welsh and Breton translations of English words, and intrinsic relevance of learned material was operationalized as perceived value of the Welsh and Breton languages. Participants were non-Welsh native English speakers who had recently arrived in Wales...
September 16, 2016: Journal of Sleep Research
Jeanine Kamphuis, Swetlana Baichel, Marike Lancel, Sietse F de Boer, Jaap M Koolhaas, Peter Meerlo
Sleep deprivation has profound effects on cognitive performance, and some of these effects may be mediated by impaired prefrontal cortex function. In search of an animal model to investigate this relationship we studied the influence of restricted sleep on operant conditioning in rats, particularly the performance in a differential reinforcement of low rate responding (DRL) task, which is highly dependent upon an intact prefrontal cortex. Animals were trained to withhold a lever press until an imposed delay of 30 s after the last press had passed in order to achieve a food reward...
September 16, 2016: Journal of Sleep Research
Vladimir Svetnik, Ellen S Snyder, Junshui Ma, Peining Tao, Christopher Lines, William Joseph Herring
Previous studies of the differences between patients with insomnia and good sleepers with regard to quantitative electroencephalographic measures have mostly utilized small samples and consequently had limited ability to account for potentially important confounding factors of age, sex and part of the night. We conducted a power spectral analysis using a large database of sleep electroencephalographic recordings to evaluate differences between patients with insomnia (N = 803) and good sleepers (N = 811), while simultaneously accounting for these factors and their interaction...
September 16, 2016: Journal of Sleep Research
Umair Akram, Jason G Ellis, Andriy Myachykov, Nicola L Barclay
People with insomnia often perceive their own facial appearance as more tired compared with the appearance of others. Evidence also highlights the eye-region in projecting tiredness cues to perceivers, and tiredness judgements often rely on preferential attention towards this region. Using a novel eye-tracking paradigm, this study examined: (i) whether individuals with insomnia display preferential attention towards the eye-region, relative to nose and mouth regions, whilst observing faces compared with normal-sleepers; and (ii) whether an attentional bias towards the eye-region amongst individuals with insomnia is self-specific or general in nature...
September 14, 2016: Journal of Sleep Research
Maxwell R Anderson, Ameenat Akeeb, Joseph Lavela, Yuanxiu Chen, Thomas A Mellman
This study's objective was to investigate the relationship between a variable-number tandem-repeat (VNTR) Period 3 gene (PER3) polymorphism and sleep adaptation to stressful urban environments. Seventy-five (49 female) African American participants (ages 18-35 years) living in neighbourhoods with high rates of violent crime were selected for the study based on converging criteria for good or poor sleep. Categorization of sleep quality was based on the Insomnia Severity Index (ISI), estimates of typical sleep duration and sleep efficiency...
September 4, 2016: Journal of Sleep Research
Børge Sivertsen, Allison G Harvey, Ståle Pallesen, Mari Hysing
The aim of the current study was to assess the development and stability of sleep problems from childhood to late adolescence. This was a longitudinal cohort study of 2026 children, who completed three comprehensive health surveys, at age 7-9, 11-13 and 16-19 years. Data on difficulties with initiating and/or maintaining sleep (DIMS: assessed using a single item) and time in bed (TIB) were collected at all three waves, while insomnia assessed in line with the DSM-5 criteria and sleep duration were also assessed in the last wave...
August 17, 2016: Journal of Sleep Research
Marek Susta, Veronika Nemcova, Gustav Bizik, Karel Sonka
Reported brain abnormalities in anatomy and function in patients with narcolepsy with cataplexy led to a project based on qualitative electroencephalography examination and analysis in an attempt to find a narcolepsy with cataplexy-specific brain-derived pattern, or a sequence of brain locations involved in processing humorous stimuli. Laughter is the trigger of cataplexy in these patients, and the difference between patients and healthy controls during the laughter should therefore be notable. Twenty-six adult patients (14 male, 12 female) suffering from narcolepsy with cataplexy and 10 healthy controls (five male, five female) were examined...
August 15, 2016: Journal of Sleep Research
Takuro Sakai, Takafumi Kato, Shuichiro Yoshizawa, Takeshi Suganuma, Masayuki Takaba, Yasuhiro Ono, Ayako Yoshizawa, Yuya Yoshida, Tatsuya Kurihara, Masakazu Ishii, Fusae Kawana, Yuji Kiuchi, Kazuyoshi Baba
The aim of this study was to assess the acute effects of clonazepam and clonidine on rhythmic masticatory muscle activity in young adults with primary sleep bruxism, as well as accompanying effects on sleep architecture and cardiac activity. This study used a double-blind, crossover, placebo-controlled design. Polysomnography was performed on 19 subjects [nine men and 10 women; mean age (±SE): 25.4 ± 2.7 years] for 5 nights. The first 2 nights were used for the habituation and diagnosis of sleep bruxism...
August 3, 2016: Journal of Sleep Research
Derk-Jan Dijk
No abstract text is available yet for this article.
October 2016: Journal of Sleep Research
(no author information available yet)
No abstract text is available yet for this article.
October 2016: Journal of Sleep Research
(no author information available yet)
No abstract text is available yet for this article.
September 2016: Journal of Sleep Research
Derk-Jan Dijk
No abstract text is available yet for this article.
August 2016: Journal of Sleep Research
Ahmed S BaHammam, Seithikurippu R Pandi-Perumal, Amanda Piper, Salman A Bahammam, Aljohara S Almeneessier, Awad H Olaish, Shahrokh Javaheri
The role of gender and menopause in obstructive sleep apnoea is well known; however, no study has reported the impact of gender on the clinical presentation and the nocturnal respiratory events in patients with obesity hypoventilation syndrome. Therefore, this study prospectively evaluated differences in the clinical characteristics of women and men with obesity hypoventilation syndrome in a large cohort of patients with obstructive sleep apnoea. During the study period, a total of 1973 patients were referred to the sleep clinic with clinical suspicion of obstructive sleep apnoea...
August 2016: Journal of Sleep Research
Christy A Olson, Nancy A Hamilton, Virend K Somers
Sleep contributes importantly to energy homeostasis, and may impact hormones regulating appetite, such as leptin, an adipocyte-derived hormone. There is increasing evidence that sleep duration, and reduced rapid eye movement sleep, are linked to obesity. Leptin has central neural effects beyond modulation of appetite alone. As sleep is not a unifrom process, interactions between leptin and sleep stages including rapid eye movement sleep may play a role in the relationship between sleep and obesity. This study examined the relationship between serum leptin and rapid eye movement sleep in a sample of healthy adults...
August 2016: Journal of Sleep Research
Sasipas Chontong, Sunee Saetung, Sirimon Reutrakul
Sleep disturbances have been linked to insulin resistance and poor glycaemic control in patients with type 2 diabetes. However, the data are limited in type 1 diabetes. Recently, varying day-to-day sleep schedules, i.e. sleep variability, have been associated with adverse metabolic profile in healthy individuals. This study explored whether sleep variability affects glycaemic control and insulin requirement in type 1 diabetes. Forty-one adult patients with type 1 diabetes wore an actigraphy for 5 nights. Standard deviation of sleep duration, efficiency and mid-sleep time were sleep variability parameters...
August 2016: Journal of Sleep Research
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