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Journal of Sleep Research

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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28127802/sequence-analysis-of-leg-movements-during-sleep-with-different-intervals-10-10-90-and-90%C3%A2-s-in-restless-legs-syndrome
#7
Raffaele Ferri, Francesco Rundo, Alessandro Silvani, Marco Zucconi, Debora Aricò, Oliviero Bruni, Filomena I I Cosentino, Luigi Ferini-Strambi, Mauro Manconi
The aim of this study was to define the time structure of leg movements during sleep occurring with an intermovement interval (onset-to-onset) shorter than 10 s in patients with restless legs syndrome and controls, and to compare it to the structure of movements with intervals of 10-90 s or >90 s. Polysomnographic recordings of 141 untreated patients and 68 age-matched normal controls were analysed. All movements were detected and classified into three categories, separated by intervals of <10, 10-90 or >90 s...
January 27, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28116804/gabapentin-acutely-increases-the-apnea-hypopnea-index-in-older-men-data-from-a-randomized-double-blind-placebo-controlled-study
#8
Ronaldo D Piovezan, Camila Kase, Renato Moizinho, Sergio Tufik, Dalva Poyares
Although drugs with sedative properties may increase the risk of airway collapse during sleep, their acute effects on the apnea-hypopnea index in older adults are under-reported. We investigated the acute effects of gabapentin (GABA) on sleep breathing in older men without sleep apnea. A double-blind, randomized, placebo-controlled cross-over pilot study using a bedtime dose of gabapentin 300 mg was conducted in eight non-obese older men. Polysomnography measured the effects of the intervention. The apnea-hypopnea index was higher in the gabapentin arm than in the placebo arm (22...
January 24, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28116761/assessing-the-benefits-of-napping-and-short-rest-breaks-on-processing-speed-in-sleep-restricted-adolescents
#9
Julian Lim, June C Lo, Michael W L Chee
Achievement-oriented adolescents often study long hours under conditions of chronic sleep restriction, adversely affecting cognitive function. Here, we studied how napping and rest breaks (interleaved off-task periods) might ameliorate the negative effects of sleep restriction on processing speed. Fifty-seven healthy adolescents (26 female, age = 15-19 years) participated in a 15-day live-in protocol. All participants underwent sleep restriction (5 h time-in-bed), but were then randomized into two groups: one of these groups received a daily 1-h nap opportunity...
January 24, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28116759/improvement-of-a-patient-s-circadian-rhythm-sleep-disorders-by-aripiprazole-was-associated-with-stabilization-of-his-bipolar-illness
#10
Tetsuo Tashiro
Splitting of the behavioural activity phase has been found in nocturnal rodents with suprachiasmatic nucleus (SCN) coupling disorder. A similar phenomenon was observed in the sleep phase in the diurnal human discussed here, suggesting that there are so-called evening and morning oscillators in the SCN of humans. The present case suffered from bipolar disorder refractory to various treatments, and various circadian rhythm sleep disorders, such as delayed sleep phase, polyphasic sleep, separation of the sleep bout resembling splitting and circabidian rhythm (48 h), were found during prolonged depressive episodes with hypersomnia...
January 24, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28116758/psychosocial-work-characteristics-sleep-disturbances-and-risk-of-subsequent-depressive-symptoms-a-study-of-time-varying-effect-modification
#11
Linda L Magnusson Hanson, Paraskevi Peristera, Holendro S Chungkham, Hugo Westerlund
Job strain and low social support at work are recognized risk factors for depression. However, people with poor sleep may represent a high-risk group more likely to benefit from interventions against work stress. The present study examined whether the associations between these work stressors and depressive symptoms differed by strata of sleep disturbances (effect modification/effect moderation) considering repeat measures of work characteristics and sleep. The study was based on five biennial measurements of the Swedish Longitudinal Occupational Survey of Health, including 1537 respondents recurrently in paid work, from an originally representative sample of the Swedish working population...
January 24, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28101894/sleep-quality-and-body-mass-index-a-co-twin-study
#12
Juan J Madrid-Valero, José M Martínez-Selva, Juan R Ordoñana
There is a consistent relationship between body mass index and sleep quality. However, the directionality and possible confounding factors of this relationship are unclear. Our aim is to confirm the association between sleep quality and body mass index, independent of possible genetic confounding, as well as to provide some indirect inferences about the directionality of this association. The co-twin study design was used to analyse the body mass index-sleep relationship in a sample of 2150 twins. We selected two parallel sub-samples of twins discordant for body mass index (n = 430 pairs), or discordant for sleep quality (n = 316 pairs)...
January 19, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093830/age-affects-sleep-microstructure-more-than-sleep-macrostructure
#13
Johanna F A Schwarz, Torbjörn Åkerstedt, Eva Lindberg, Georg Gruber, Håkan Fischer, Jenny Theorell-Haglöw
It is well known that the quantity and quality of physiological sleep changes across age. However, so far the effect of age on sleep microstructure has been mostly addressed in small samples. The current study examines the effect of age on several measures of sleep macro- and microstructure in 211 women (22-71 years old) of the 'Sleep and Health in Women' study for whom ambulatory polysomnography was registered. Older age was associated with significantly lower fast spindle (effect size f(2)  = 0.32) and K-complex density (f(2)  = 0...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093827/trajectories-of-sleep-and-cardiac-sympathetic-activity-indexed-by-pre-ejection-period-in-childhood
#14
Mona El-Sheikh, J Benjamin Hinnant, Lauren E Philbrook
Fragmented and insufficient sleep has been implicated in disrupted autonomic nervous system activity during resting state conditions in typically developing children. Towards explication of these relations over development, the current study tested reciprocal relations between the development of sleep parameters (efficiency, duration, latency) and cardiac sympathetic nervous system (SNS) activity indexed by pre-ejection period (PEP) during waking-resting state conditions throughout middle and late childhood...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093825/three-decades-of-continuous-wrist-activity-recording-analysis-of-sleep-duration
#15
Alexander A Borbély, Thomas Rusterholz, Peter Achermann
Motor activity recording by a wrist-worn device is a common method to monitor the rest-activity cycle. The first author wore an actimeter continuously for more than three decades, starting in 1982 at the age of 43.5 years. Until November 2006 analysis was performed on a 15-min time base, and subsequently on a 2-min time base. The timing of night-time sleep was determined from the cessation and re-occurrence of daytime-level activity. Sleep duration declined from an initial 6.8 to 6 h in 2004. The declining trend was reversed upon retirement, whereas the variance of sleep duration declined throughout the recording period...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093823/sleep-and-its-associations-with-perceived-and-objective-cognitive-impairment-in-individuals-with-multiple-sclerosis
#16
Abbey J Hughes, Brett A Parmenter, Jodie K Haselkorn, Jesus F Lovera, Dennis Bourdette, Eilis Boudreau, Michelle H Cameron, Aaron P Turner
Problems with sleep and cognitive impairment are common among people with multiple sclerosis (MS). The present study examined the relationship between self-reported sleep and both objective and perceived cognitive impairment in MS. Data were obtained from the baseline assessment of a multi-centre intervention trial (NCT00841321). Participants were 121 individuals with MS. Nearly half (49%) of participants met the criteria for objective cognitive impairment; however, cognitively impaired and unimpaired participants did not differ on any self-reported sleep measures...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28032388/impaired-visual-processing-in-patients-with-insomnia-disorder-revealed-by-a-dissociation-in-visual-search
#17
Enrico Giora, Andrea Galbiati, Sara Marelli, Marco Zucconi, Luigi Ferini-Strambi
Insomnia disorder is associated with both subjective and objective daytime impairments. In particular, cognitive impairments are frequently reported. However, little is known about the effects of this pathology on perceptual processes. In this study we aim at evaluating the effect of insomnia disorder on visual processing by employing a visual search paradigm. Twenty-three patients with insomnia disorder and 20 healthy age- and sex-matched control subjects participated in the study. After a polysomnographic recording night patients performed a visual search task in which they had to respond to the presence/absence of a target (letter T) embedded into a set of distractors (letters Os, Xs or Ls)...
December 29, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28019055/quality-of-life-in-patients-with-an-idiopathic-rapid-eye-movement-sleep-behaviour-disorder-in-korea
#18
Keun Tae Kim, Gholam K Motamedi, Yong Won Cho
There have been few quality of life studies in patients with idiopathic rapid eye movement sleep behaviour disorder. We compared the quality of life in idiopathic rapid eye movement sleep behaviour disorder patients to healthy controls, patients with hypertension, type 2 diabetes mellitus without complication and idiopathic restless legs syndrome. Sixty patients with idiopathic rapid eye movement sleep behaviour disorder (24 female; mean age: 61.43 ± 8.99) were enrolled retrospectively. The diagnosis was established based on sleep history, overnight polysomnography, neurological examination and Mini-Mental State Examination to exclude secondary rapid eye movement sleep behavior disorder...
December 26, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28019049/facial-phenotype-in-obstructive-sleep-apnea-hypopnea-syndrome-a-systematic-review-and-meta-analysis
#19
Bahn Agha, Ama Johal
This systematic review and meta-analysis explores the association between facial phenotype and obstructive sleep apnea-hypopnea syndrome in adults. A comprehensive electronic (Medline via Ovid, Scopus, and Embase) database and reference search were undertaken in relation to imaging modalities for surface craniofacial assessments in subjects with sleep apnea. The outcome measures were surface facial dimensions, morphology and profile. The quality of studies was assessed and a meta-analysis conducted. The studies were weighted using the inverse variance method, and the random effects model was used to analyse data...
December 26, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28019041/interindividual-differences-in-the-dynamics-of-the-homeostatic-process-are-trait-like-and-distinct-for-sleep-versus-wakefulness
#20
Thomas Rusterholz, Leila Tarokh, Hans P A Van Dongen, Peter Achermann
The sleep homeostatic Process S reflects the build-up of sleep pressure during waking and its dissipation during sleep. Process S is modelled as a saturating exponential function during waking and a decreasing exponential function during sleep. Slow wave activity is a physiological marker for non-rapid eye movement (non-REM) sleep intensity and serves as an index of Process S. There is considerable interindividual variability in the sleep homeostatic responses to sleep and sleep deprivation. The aim of this study was to investigate whether interindividual differences in Process S are trait-like...
December 26, 2016: Journal of Sleep Research
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