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Journal of Sleep Research

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https://www.readbyqxmd.com/read/28332253/sex-and-ancestry-determine-the-free-running-circadian-period
#1
Charmane I Eastman, Victoria A Tomaka, Stephanie J Crowley
The endogenous, free-running circadian period (τ) determines the phase relationship that an organism assumes when entrained to the 24-h day. We found a shorter circadian period in African Americans compared to non-Hispanic European Americans (24.07 versus 24.33 h). We speculate that a short circadian period, closer to 24 h, was advantageous to humans living around the equator, but when humans migrated North out of Africa, where the photoperiod changes with seasons, natural selection favoured people with longer circadian periods...
March 23, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28326645/local-changes-in-the-wake-electroencephalogram-precedes-lane-departures
#2
Christer Ahlstrom, Sabina Jansson, Anna Anund
The objective of this exploratory study is to investigate if lane departures are associated with local sleep, measured via source-localized electroencephalography (EEG) theta power in the 5-9 Hz frequency range. Thirty participants drove in an advanced driving simulator, resulting in 135 lane departures at high levels of self-reported sleepiness. These lane departures were compared to matching non-departures at the same sleepiness level within the same individual. There was no correspondence between lane departures and global theta activity...
March 22, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28318068/helicid-alleviates-pain-and-sleep-disturbances-in-a-neuropathic-pain-like-model-in-mice
#3
Meng-Qi Zhang, Tian-Xiao Wang, Rui Li, Zhi-Li Huang, Wu-Jian Han, Xiao-Chang Dai, Yi-Qun Wang
Natural helicid (4-formylphenyl-O-β-d-allopyranoside), a main active constituent from seeds of the Chinese herb Helicia nilagirica, has been reported to exert a sedative, analgesic and hypnotic effect, and is used clinically to treat neurasthenic syndrome, vascular headaches and trigeminal neuralgia. In the current study, mechanical allodynia tests, electroencephalograms, electromyogram recordings and c-Fos expression in neuropathic pain-like model mice of partial sciatic nerve ligation were used to investigate the effect of helicid on neuropathic pain and co-morbid insomnia...
March 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28318060/integrating-postural-and-vestibular-dimensions-to-depict-impairment-in-moderate-to-severe-obstructive-sleep-apnea-syndrome-patients
#4
Alessandro Micarelli, Claudio Liguori, Andrea Viziano, Francesca Izzi, Fabio Placidi, Marco Alessandrini
Vestibular dysfunction was linked to moderate-to-severe obstructive sleep apnea syndrome (OSAS) patients in literature. However, due to a lack of knowledge among valid and recent implementations conceived to study postural control on static posturography (SP) and vestibulo-ocular reflex (VOR) gain under physiological conditions (video Head Impulse Test; vHIT), the aim of this work was to integrate (i) VOR changes via vHIT implementation, (ii) postural arrangement by studying both classical parameters and frequency spectra (PS) and (iii) correlation between these findings, polygraphic (PG) and subjective scores along Dizziness Handicap Inventory (DHI) and Epworth Sleepiness Scale (ESS)...
March 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28303674/simultaneous-recording-of-ultrasound-and-polysomnography-during-natural-sleep-in-patients-with-obstructive-sleep-apnea-a-pilot-study
#5
Jeng-Wen Chen, Chih-Chung Huang, Chi-Kai Weng, Chun-Hsiang Chang, Shou-Jen Wang
Tongue base deformation may play a critical role in the phenomenon of obstructive sleep apnea, but polysomnography provides limited information regarding the effect of tongue motion during natural sleep. We reported on preliminary results of combining a novel ultrasound system and polysomnography for simultaneous recordings during natural sleep in volunteers and patients with obstructive sleep apnea. All participants underwent time-synchronized polysomnography and submental transcutaneous ultrasound examinations...
March 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28303621/distal-skin-vasodilation-promotes-rapid-sleep-onset-in-preterm-neonates
#6
Lucile Barcat, Pauline Decima, Emilie Bodin, Stephane Delanaud, Erwan Stephan-Blanchard, Andre Leke, Jean-Pierre Libert, Pierre Tourneux, Veronique Bach
Although sleep is of paramount importance for preterm neonates, care of the latter in a neonatal intensive care unit does not favour sleep. Given that several studies in adults have described a 'vegetative preparedness to sleep' (in which distal skin vasodilation before lights-out promotes rapid sleep onset), we looked at whether or not this process operates in preterm neonates. Sleep propensity was assessed in terms of the duration of a spontaneous episode of wakefulness (W). Skin temperatures at six body sites (the abdomen, pectoral region, eye, hand, thigh and foot) were measured (using infrared thermography) during nocturnal polysomnography in 29 9-day-old preterm neonates (postmenstrual age: 209 ± 9 days)...
March 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28271579/self-reported-sleep-quantity-quality-and-sleep-hygiene-in-elite-athletes
#7
Melanie Knufinke, Arne Nieuwenhuys, Sabine A E Geurts, Anton M L Coenen, Michiel A J Kompier
Sleep is essential for recovery and performance in elite athletes. While actigraphy-based studies revealed suboptimal sleep in athletes, information on their subjective experience of sleep is scarce. Relatively unexplored is also the extent to which athletes' sleep is adversely affected by environmental conditions and daytime behaviours, that is sleep hygiene. This study aimed to provide insight in sleep quantity, quality and its putative association with sleep hygiene. Participants were 98 elite (youth) athletes competing at the highest (inter-)national level...
March 8, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28271575/bedtime-shuteye-time-and-electronic-media-sleep-displacement-is-a-two-step-process
#8
Liese Exelmans, Jan Van den Bulck
This study argues that going to bed may not be synonymous with going to sleep, and that this fragmentation of bedtime results in a two-step sleep displacement. We separated bedtime (i.e. going to bed) from shuteye time (i.e. attempting to go to sleep once in bed) and assessed the prevalence of electronic media use in both time slots. A convenience sample of 338 adults (aged 18-25 years, 67.6% women) participated in an online survey. Results indicated a gap of 39 min between bedtime and shuteye time, referred to as 'shuteye latency'...
March 8, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28251722/memory-effects-of-sleep-emotional-valence-arousal-and-novelty-in-children
#9
Marije C M Vermeulen, Kristiaan B van der Heijden, Jeroen S Benjamins, Hanna Swaab, Eus J W van Someren
Effectiveness of memory consolidation is determined by multiple factors, including sleep after learning, emotional valence, arousal and novelty. Few studies investigated how the effect of sleep compares with (and interacts with) these other factors, of which virtually none are in children. The present study did so by repeated assessment of declarative memory in 386 children (45% boys) aged 9-11 years through an online word-pair task. Children were randomly assigned to either a morning or evening learning session of 30 unrelated word-pairs with positive, neutral or negative valenced cues and neutral targets...
March 2, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28251718/priming-recognition-in-good-sleepers-and-in-insomniacs
#10
Fiorenza Giganti, Beatrice Aisa, Cinzia Arzilli, Maria Pia Viggiano, Mariangela Cerasuolo, Francesca Conte, Gianluca Ficca
Insomniacs often report memory and concentration problems, but these complaints have not been consistently supported by performance measurements. Furthermore, while the majority of studies have addressed explicit memory, few have investigated the implicit domain, and very little is known concerning other types of implicit memory besides procedural memory, such as priming. Thus, the purpose of the study was to investigate priming effect for visual stimuli in insomniacs and good sleepers. Twenty-three insomniacs and 20 good sleepers performed a visual priming task in which they were asked to name new and old pictures presented at nine ascending levels of spatial filtering...
March 2, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28251715/homeostatic-response-to-sleep-rest-deprivation-by-constant-water-flow-in-larval-zebrafish-in-both-dark-and-light-conditions
#11
Vilma Aho, Maija Vainikka, Henri A J Puttonen, Heidi M K Ikonen, Tiia Salminen, Pertti Panula, Tarja Porkka-Heiskanen, Henna-Kaisa Wigren
Sleep-or sleep-like states-have been reported in adult and larval zebrafish using behavioural criteria. These reversible quiescent periods, displaying circadian rhythmicity, have been used in pharmacological, genetic and neuroanatomical studies of sleep-wake regulation. However, one of the important criteria for sleep, namely sleep homeostasis, has not been demonstrated unequivocally. To study rest homeostasis in zebrafish larvae, we rest-deprived 1-week-old larvae with a novel, ecologically relevant method: flow of water...
March 2, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28239925/insomnia-management-in-prisons-in-england-and-wales-a-mixed-methods-study
#12
Lindsay H Dewa, Lamiece Hassan, Jenny J Shaw, Jane Senior
Insomnia in prison is common; however, research is limited regarding the management strategies that prison establishments employ. To address this knowledge gap, we conducted a survey to identify how insomnia is detected, diagnosed and treated in adult prisons in England and Wales. Telephone interviews with a purposive sample of health-care managers were then conducted. The survey was sent to all establishments holding adult prisoners, covering screening and assessment methods to detect insomnia; treatment options, both pharmacological and non-pharmacological; the importance of insomnia as a treatable condition; and staff training available...
February 27, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28230307/cdkl5-deficiency-entails-sleep-apneas-in-mice
#13
Viviana Lo Martire, Sara Alvente, Stefano Bastianini, Chiara Berteotti, Alessandro Silvani, Alice Valli, Rocchina Viggiano, Elisabetta Ciani, Giovanna Zoccoli
A recently discovered neurodevelopmental disorder caused by the mutation of the cyclin-dependent kinase-like 5 gene (CDKL5) entails complex autistic-like behaviours similar to Rett syndrome, but its impact upon physiological functions remains largely unexplored. Sleep-disordered breathing is common and potentially life-threatening in patients with Rett syndrome; however, evidence is limited in children with CDKL5 disorder, and is lacking altogether in adults. The aim of this study was to test whether the breathing pattern during sleep differs between adult Cdkl5 knockout (Cdkl5-KO) and wild-type (WT) mice...
February 23, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28230295/associations-of-domain-specific-physical-activities-with-insomnia-symptoms-among-0-5-million-chinese-adults
#14
Bang Zheng, Canqing Yu, Liling Lin, Huaidong Du, Jun Lv, Yu Guo, Zheng Bian, Yiping Chen, Min Yu, Jianguo Li, Junshi Chen, Zhengming Chen, Liming Li
Previous studies have demonstrated the association between physical activity and sleep quality. However, there is little evidence regarding different domains of physical activity. This study aimed to examine the associations between domain-specific physical activities and insomnia symptoms among Chinese men and women. Data of 452 024 Chinese adults aged 30-79 years from the China Kadoorie Biobank Study were analysed. Insomnia symptoms were assessed with self-reported difficulties in initiating or maintaining sleep, early morning awakening, daytime dysfunction and any insomnia symptoms...
February 23, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28220585/sleep-duration-is-associated-with-body-fat-and-muscle-mass-and-waist-to-height-ratio-beyond-conventional-obesity-parameters-in-korean-adolescent-boys
#15
Ga Eun Nam, Kyungdo Han, Do Hoon Kim, Jee Hyun Lee, Won Hee Seo
While evidence has supported a strong association between sleep duration and obesity globally, results from studies of children and adolescents have been conflicting, and information about a sex-specific association has been limited. This study aimed to investigate the association of sleep duration with various parameters of obesity among South Korean adolescents. This population-based, cross-sectional study analysed the data obtained from the Korea National Health and Nutrition Examination Surveys (KNHANES) 2009 and 2010...
February 21, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28220576/sleep-duration-and-falls-a-systemic-review-and-meta-analysis-of-observational-studies
#16
REVIEW
Lei Wu, Dali Sun
Several epidemiological studies have linked sleep duration with falls; however, the findings yielded inconsistent results. No quantitative analysis has specifically assessed the influence of sleep duration on falls. PubMed and Embase were screened for observational studies from inception to 13 September 2016. A generic inverse-variance method was used to pool the outcome data for sleep duration categories of the lowest category versus reference, and the highest category versus reference with a random-effects model...
February 21, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28220556/association-between-central-sleep-apnea-and-left-ventricular-structure-the-multi-ethnic-study-of-atherosclerosis
#17
Sogol Javaheri, Ravi K Sharma, David A Bluemke, Susan Redline
We assessed whether the presence of central sleep apnea is associated with adverse left ventricular structural changes. We analysed 1412 participants from the Multi-Ethnic Study of Atherosclerosis who underwent both overnight polysomnography and cardiac magnetic resonance imaging. Subjects had been recruited 10 years earlier when free of cardiovascular disease. Our main exposure is the presence of central sleep apnea as defined by central apnea-hypopnea index = 5 or the presence of Cheyne-Stokes breathing...
February 21, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28220551/association-between-sleep-duration-fat-mass-lean-mass-and-obesity-in-korean-adults-the-fourth-and-fifth-korea-national-health-and-nutrition-examination-surveys
#18
Kyuwoong Kim, Doosup Shin, Go-Un Jung, Donghoon Lee, Sang Min Park
This study investigated the association between sleep duration, fat mass, lean mass and obesity. Participants of this cross-sectional study were 16 905 adults included into the 4th and 5th Korea National Health and Nutrition Examination Surveys. Sleep duration was assessed by self-reported survey and categorized into ≤ 5, 6, 7, 8 and ≥ 9 h per day. The group reporting 7 h of sleep per day (comprised of those sleeping 7-8 h per day) was used as the reference group. Body composition was measured by dual X-ray absorptiometry (DEXA)...
February 21, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28211138/nocturnal-autonomic-nervous-system-activity-and-morning-proinflammatory-cytokines-in-young-adult-african-americans
#19
Kimberly A Bell, Ihori Kobayashi, Yuanxiu Chen, Thomas A Mellman
Compromised sleep and increased sympathetic nervous system (SNS) activity are implicated in the pathogenesis of, and disparities in, cardiovascular disease. Parasympathetic dominance during sleep may be important for cardiovascular health. Sleep and autonomic balance influence immune activity, which impacts atherogenesis. We evaluated relationships between autonomic balance during sleep and morning levels of the immune activating cytokines, C-reactive protein (CRP) and interleukin (IL)-6. Ninety-four (59 female) young adult African Americans without medical conditions and substance use disorders spent 2 consecutive nights in a clinical research unit for sleep recordings and blood drawing on awakening...
February 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28145043/objective-measures-of-sleep-duration-and-continuity-in-major-depressive-disorder-with-comorbid-hypersomnolence-a-primary-investigation-with-contiguous-systematic-review-and-meta-analysis
#20
REVIEW
David T Plante, Jesse D Cook, Michael R Goldstein
Hypersomnolence plays an important role in the presentation, treatment and course of mood disorders. However, there has been relatively little research that examines objective measures of sleep duration and continuity in patients with depression and hypersomnolence, despite the use of these factors in sleep medicine nosological systems. This study compared total sleep time and efficiency measured by naturalistic actigraphic recordings followed by ad libitum polysomnography (PSG; without prescribed wake time) in 22 patients with major depressive disorder and co-occurring hypersomnolence against age- and sex-matched healthy sleeper controls...
February 1, 2017: Journal of Sleep Research
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