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Journal of Sleep Research

Martina Křečková, David Kemlink, Karel Šonka, Jan Krásenský, Jitka Bušková, Manuela Vaněčková, Veronika Němcová
Narcolepsy with cataplexy is a lifelong disease resulting from the loss of hypocretin neurons in the hypothalamus; structural changes are not, however, limited only to the hypothalamus. We previously revealed an overall hippocampal volume loss in narcolepsy with cataplexy. The aim of this study is to describe the volume reduction of the anterior and posterior parts of the hippocampus in patients with narcolepsy with cataplexy in comparison with a control group. The anterior hippocampus is more involved in episodic memory and imagination, and the posterior hippocampus in spatial memory...
November 13, 2018: Journal of Sleep Research
Victoria M Pak, Lisa Strouss, Henry K Yaggi, Nancy S Redeker, Vahid Mohsenin, Barbara Riegel
Patients with both heart failure and obstructive sleep apnea often have poor, repeatedly disrupted sleep, and yet they frequently do not complain of excessive daytime sleepiness. Understanding this lack of perceived sleepiness is crucial for the case identification and treatment of obstructive sleep apnea in the heart failure population at high risk of this disease, especially given the association between untreated obstructive sleep apnea and mortality among patients with heart failure. In this review, we present epidemiologic evidence concerning the lack of sleepiness symptoms in heart failure and obstructive sleep apnea, explore possible mechanistic explanations for this relationship, assess the benefits of treatment in this population, discuss implications for clinical practice and explore directions for future research...
November 13, 2018: Journal of Sleep Research
Kaare B Mikkelsen, James K Ebajemito, Maria A Bonmati-Carrion, Nayantara Santhi, Victoria L Revell, Giuseppe Atzori, Ciro Della Monica, Stefan Debener, Derk-Jan Dijk, Annette Sterr, Maarten de Vos
Quantification of sleep is important for the diagnosis of sleep disorders and sleep research. However, the only widely accepted method to obtain sleep staging is by visual analysis of polysomnography (PSG), which is expensive and time consuming. Here, we investigate automated sleep scoring based on a low-cost, mobile electroencephalogram (EEG) platform consisting of a lightweight EEG amplifier combined with flex-printed cEEGrid electrodes placed around the ear, which can be implemented as a fully self-applicable sleep system...
November 13, 2018: Journal of Sleep Research
Markus Waser, Martin J Lauritzen, Birgitte Fagerlund, Merete Osler, Erik L Mortensen, Helge B D Sørensen, Poul Jennum
Disrupted sleep is a contributing factor to cognitive ageing, while also being associated with neurodegenerative disorders. Little is known, however, about the relation of sleep and the gradual cognitive changes over the adult life course. Sleep electroencephalogram (EEG) patterns are potential markers of the cognitive progress. To test this hypothesis, we assessed sleep architecture and EEG of 167 men born in the Copenhagen Metropolitan Area in 1953, who, based on individual cognitive testing from early (~18 years) to late adulthood (~58 years), were divided into 85 subjects with negative and 82 with positive cognitive change over their adult life...
November 12, 2018: Journal of Sleep Research
Jesse D Cook, Sahand C Eftekari, Erika Dallmann, Megan Sippy, David T Plante
Measuring sleep duration and early onset rapid eye movement sleep (REMS) is critical in the assessment of suspected central disorders of hypersomnolence (CDH). Current multi-sensor activity trackers that integrate accelerometry and heart rate are purported to accurately quantify sleep time and REMS; however, their utility in suspected CDH has not been established. This investigation aimed to determine the ability of a current, multi-sensor tracker, Fitbit Alta HR (FBA-HR), to quantify and classify sleep in patients with suspected CDH relative to polysomnography (PSG)...
November 8, 2018: Journal of Sleep Research
Suzanna M Martinez, Jeanne M Tschann, Nancy F Butte, Steve E Gregorich, Carlos Penilla, Elena Flores, Lauri A Pasch, Lousie C Greenspan, Julianna Deardorff
This study examined parenting styles, parenting practices and family practices that may be associated with weeknight sleep duration among 8- to 10-year-old Mexican American (MA) children. This cross-sectional study of MA children used baseline data from a 2-year cohort study of mother-child pairs (n = 308) with additional data on fathers (n = 166). Children's weeknight sleep duration was accelerometer estimated and averaged for 2 weeknights. Parents reported on their parenting styles and practices regarding food and family food-related practices...
November 5, 2018: Journal of Sleep Research
Henriette Koch, Poul Jennum, Julie A E Christensen
The reference standard for sleep classification uses manual scoring of polysomnography with fixed 30-s epochs. This limits the analysis of sleep pattern, structure and, consequently, detailed association with other physiologic processes. We aimed to improve the details of sleep evaluation by developing a data-driven method that objectively classifies sleep in smaller time intervals. Two adaptive segmentation methods using 3, 10 and 30-s windows were compared. One electroencephalographic (EEG) channel was used to segment into quasi-stationary segments and each segment was classified using a multinomial logistic regression model...
October 22, 2018: Journal of Sleep Research
Marije C M Vermeulen, Kristiaan B Van der Heijden, Hanna Swaab, Eus J W Van Someren
The macro- and microstructural characteristics of sleep electroencephalography have been associated with several aspects of executive functioning. However, only a few studies have addressed the association of sleep characteristics with the learning involved in the acquisition of executive functions, and no study has investigated this for planning and problem-solving skills in the developing brain of children. The present study examined whether children's sleep stages and microstructural sleep characteristics are associated with performance improvement over repeated assessments of the Tower of Hanoi task, which requires integrated planning and problem-solving skills...
October 18, 2018: Journal of Sleep Research
W Joseph Herring, Thomas Roth, Andrew D Krystal, David Michelson
In this review, we outline the role of orexin receptor antagonists in disorders of sleep/wake and other potential neuropsychiatric conditions, with a focus on suvorexant, which is currently the only approved agent in this class. The efficacy of suvorexant was established in Phase 2-3 trials with treatment durations ranging from 1 to 12 months in patients with insomnia. Suvorexant is effective at improving sleep assessed by patient self-report and by polysomnography, with generally little effect on underlying sleep architecture...
October 18, 2018: Journal of Sleep Research
Carolin Konrad, Nora D Dirks, Annegret Warmuth, Jane S Herbert, Silvia Schneider, Sabine Seehagen
In adults, sleep selectively consolidates those memories that are relevant for future events. The present study tested whether napping after encoding plays a role in selective memory consolidation in infants. Infants aged 15 and 24 months (n = 48 per age) were randomly assigned to a nap or a no-nap demonstration condition, or a baseline control condition. In the demonstration conditions, infants observed an experimenter perform an irrelevant action followed by a relevant action to achieve a desirable outcome on four different toys...
October 17, 2018: Journal of Sleep Research
Maxime M Bos, Raymond Noordam, Rosa van den Berg, Renée de Mutsert, Frits R Rosendaal, Gerard Jan Blauw, Patrick C N Rensen, Nienke R Biermasz, Diana van Heemst
Short and long sleep duration and poor sleep quality may affect serum and hepatic lipid content, but available evidence is inconsistent. Therefore, we aimed to investigate the associations of sleep duration and quality with serum and hepatic lipid content in a large population-based cohort of middle-aged individuals. The present cross-sectional study was embedded in the Netherlands Epidemiology of Obesity (NEO) study and consisted of 4260 participants (mean age, 55 years; proportion men, 46%) not using lipid-lowering agents...
October 15, 2018: Journal of Sleep Research
Hajime Iwasa, Yoshitake Takebayashi, Yuriko Suzuki, Akiko Yagi, Wen Zhang, Mayumi Harigane, Masaharu Maeda, Tetsuya Ohira, Hirooki Yabe, Seiji Yasumura
We investigated the psychometric properties of the simplified Japanese version of the Athens Insomnia Scale (AIS-SJ) using baseline data from the Fukushima Health Management Survey. Data from 22 878 men and 27 669 women aged 16 years and older were analysed (Mage  = 52.9 ± 18.6). Participants lived in the Fukushima evacuation zone and experienced the Great East Japan Earthquake. The AIS-SJ was used to assess participants' insomnia symptoms, and its validity was examined by administering the Kessler 6-item Psychological Distress Scale (K6) and assessing education, self-rated health and disaster-related experiences...
October 12, 2018: Journal of Sleep Research
Thomas Lehoux, Julie Carrier, Roger Godbout
Autism is a developmental disorder with a neurobiological aetiology. Studies of the autistic brain identified atypical developmental trajectories that may lead to an impaired capacity to modulate electroencephalogram activity during sleep. We assessed the topography and characteristics of non-rapid eye movement sleep electroencephalogram slow waves in 26 boys aged between 6 and 13 years old: 13 with an autism spectrum disorder and 13 typically developing. None of the participants was medicated, intellectually disabled, reported poor sleep, or suffered from medical co-morbidities...
October 12, 2018: Journal of Sleep Research
Claire E H M Donjacour, Gert Jan Lammers, Jerome M Siegel
No abstract text is available yet for this article.
October 12, 2018: Journal of Sleep Research
Panagis Drakatos, Lucy Marples, Rexford Muza, Sean Higgins, Alexander Nesbitt, Eptehal M Dongol, Raluca Macavei, Valentina Gnoni, Laura Perez Carbonell, Iain Duncan, Adam Birdseye, Sakina Dastagir, Ivana Rosenzweig, David O'Regan, Adrian J Williams, Guy D Leschziner, Brian D Kent
Although video polysomnography (vPSG) is not routinely recommended for the evaluation of typical cases of non-rapid eye movement (NREM) parasomnias, it can aid diagnosis of unusual cases, other sleep disorders and complicated cases with REM behaviour disorder (RBD), and in differentiating parasomnias from epilepsy. In this study, we aimed to assess vPSG findings in consecutive patients with a clinical diagnosis of NREM-parasomnia covering the whole phenotypic spectrum. Five hundred and twelve patients with a final diagnosis of NREM parasomnia who had undergone vPSG were retrospectively identified...
October 8, 2018: Journal of Sleep Research
Ingo Fietze, Naima Laharnar, Anne Obst, Ralf Ewert, Stephan B Felix, Carmen Garcia, Sven Gläser, Martin Glos, Carsten Oliver Schmidt, Beate Stubbe, Henry Völzke, Sandra Zimmermann, Thomas Penzel
Identification of obstructive sleep apnea and risk factors is important for reduction in symptoms and cardiovascular risk, and for improvement of quality of life. The population-based Study of Health in Pomerania investigated risk factors and clinical diseases in a general population of northeast Germany. Additional polysomnography was applied to measure sleep and respiration with the objective of assessing prevalence and risk factors of obstructive sleep apnea in a German cohort. One-thousand, two-hundred and eight people between 20 and 81 years old (54% men, median age 54 years) underwent overnight polysomnography...
October 1, 2018: Journal of Sleep Research
Sophie G Carter, Jayne C Carberry, Ronald R Grunstein, Danny J Eckert
Pharyngeal and oesophageal manometry is used clinically and in research to quantify respiratory effort, upper-airway mechanics and the pathophysiological contributors to obstructive sleep apnea. However, the effects of this equipment on respiratory events and sleep in obstructive sleep apnea are unclear. As part of a clinical trial (ANZCTRN12613001106729), data from 28 participants who successfully completed a physiology night with an epiglottic catheter and nasal mask followed by a standard in-laboratory polysomnography were compared...
October 1, 2018: Journal of Sleep Research
Maria Värendh, Morgan Andersson, Erla Björnsdóttir, Erna S Arnardóttir, Thorarinn Gislason, Allan I Pack, Harald Hrubos-Strøm, Arne Johannisson, Sigurdur Juliusson
We hypothesized that positive airway pressure treatment would induce nasal obstruction and decrease nasal cavity due to mucosal swelling. We further hypothesized that subjective and objective nasal obstruction at baseline would negatively affect positive airway pressure adherence. A total of 728 patients with sleep apnea were investigated in the Icelandic Sleep Apnea Cohort at baseline and 2 years after starting positive airway pressure. Patients underwent home sleep apnea testing at baseline. Questionnaires were answered and acoustic rhinometry was completed at baseline and follow-up...
September 28, 2018: Journal of Sleep Research
Angeliki Tsapanou, Georgios S Vlachos, Stephanie Cosentino, Yian Gu, Jennifer J Manly, Adam M Brickman, Nicole Schupf, Molly E Zimmerman, Mary Yannakoulia, Mary H Kosmidis, Efthimios Dardiotis, Georgios Hadjigeorgiou, Paraskevi Sakka, Yaakov Stern, Nikolaos Scarmeas, Richard Mayeux
Subjective cognitive decline may reflect a dementia prodrome or modifiable risk factor such as sleep disturbance. What is the association between sleep and subjective cognitive decline? Cross-sectional design, from two studies of older adults: the WHICAP in the USA and the HELIAD in Greece. A total of 1,576 WHICAP and 1,456 HELIAD participants, without mild cognitive impairment, dementia or severe depression/anxiety, were included. Participants were mostly women, with 12 (WHICAP) and 8 (HELIAD) mean years of education...
September 25, 2018: Journal of Sleep Research
Ludger Grote
Education in the scoring of sleep-disordered breathing is organised differently and data on the evaluation of teaching strategies based on student ratings are sparse. The aim of the study was to analyse the gain in theoretical and practical knowledge achieved during different course settings offered by a national sleep society. The course contained 1 hr of theoretical teaching (scoring rules and recording methodology) and 2.5 hr of practical scoring (physiological breathing, obstructive/central sleep apnea and hypoventilation)...
September 23, 2018: Journal of Sleep Research
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