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https://www.readbyqxmd.com/read/28323455/the-sleep-of-the-ring-comparison-of-the-%C3%A5-ura-sleep-tracker-against-polysomnography
#1
Massimiliano de Zambotti, Leonardo Rosas, Ian M Colrain, Fiona C Baker
OBJECTIVE/BACKGROUND: To evaluate the performance of a multisensor sleep-tracker (ŌURA ring) against polysomnography (PSG) in measuring sleep and sleep stages. PARTICIPANTS: Forty-one healthy adolescents and young adults (13 females; Age: 17.2 ± 2.4 years). METHODS: Sleep data were recorded using the ŌURA ring and standard PSG on a single laboratory overnight. Metrics were compared using Bland-Altman plots and epoch-by-epoch (EBE) analysis...
March 21, 2017: Behavioral Sleep Medicine
https://www.readbyqxmd.com/read/28319182/the-viability-of-an-ecologically-valid-chronic-sleep-restriction-and-circadian-timing-protocol-an-examination-of-sample-attrition-compliance-and-effectiveness-at-impacting-sleepiness-and-mood
#2
David L Dickinson, Sean P A Drummond, Todd McElroy
Chronic sleep restriction (SR) increases sleepiness, negatively impacts mood, and impairs a variety of cognitive performance measures. The vast majority of work establishing these effects are tightly controlled in-lab experimental studies. Examining commonly-experienced levels of SR in naturalistic settings is more difficult and generally involves observational methods, rather than active manipulations of sleep. The same is true for analyzing behavioral and cognitive outcomes at circadian unfavorable times...
2017: PloS One
https://www.readbyqxmd.com/read/28315647/a-device-that-allows-rodents-to-behaviorally-thermoregulate-when-housed-in-vivariums
#3
Christopher J Gordon, Earl T Puckett, Elizabeth S Repasky, Andrew F M Johnstone
Laboratories and vivariums typically are maintained at ambient temperatures of 20 to 24 °C, leading to cold stress in mice. When mice are inactive and sleeping during the light phase, their zone of thermoneutrality associated with a basal metabolic rate is 30 to 32 °C. If given a choice, mice will use thermoregulatory behavior to seek out thermoneutral temperatures during the light phase. The cold stress of a vivarium can be problematic to researchers requiring an animal model that is not stressed metabolically...
March 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28303543/accelerometer-data-collection-and-processing-criteria-to-assess-physical-activity-and-other-outcomes-a-systematic-review-and-practical-considerations
#4
REVIEW
Jairo H Migueles, Cristina Cadenas-Sanchez, Ulf Ekelund, Christine Delisle Nyström, Jose Mora-Gonzalez, Marie Löf, Idoia Labayen, Jonatan R Ruiz, Francisco B Ortega
BACKGROUND: Accelerometers are widely used to measure sedentary time, physical activity, physical activity energy expenditure (PAEE), and sleep-related behaviors, with the ActiGraph being the most frequently used brand by researchers. However, data collection and processing criteria have evolved in a myriad of ways out of the need to answer unique research questions; as a result there is no consensus. OBJECTIVES: The purpose of this review was to: (1) compile and classify existing studies assessing sedentary time, physical activity, energy expenditure, or sleep using the ActiGraph GT3X/+ through data collection and processing criteria to improve data comparability and (2) review data collection and processing criteria when using GT3X/+ and provide age-specific practical considerations based on the validation/calibration studies identified...
March 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28293310/obstructive-sleep-apnea-and-lipid-abnormalities
#5
Dimitar Karkinski, Oliver Georgievski, Pavlina Dzekova-Vidimliski, Tatjana Milenkovic, Dejan Dokic
BACKGROUND: There has been a great interest in the interaction between obstructive sleep apnea (OSA) and metabolic dysfunction, but there is no consistent data suggesting that OSA is a risk factor for dyslipidemia. AIM: The aim of this cross-sectional study was to evaluate the prevalence of lipid abnormalities in patients suspected of OSA, referred to our sleep laboratory for polysomnography. MATERIAL AND METHODS: Two hundred patients referred to our hospital with suspected OSA, and all of them underwent for standard polysomnography...
March 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28286087/minos-insertion-mutant-of-the-drosophila-gba-gene-homologue-showed-abnormal-phenotypes-of-climbing-ability-sleep-and-life-span-with-accumulation-of-hydroxy-glucocerebroside
#6
Haruhisa Kawasaki, Takahiro Suzuki, Kumpei Ito, Tsubasa Takahara, Naoko Goto-Inoue, Mitsutoshi Setou, Kazuki Sakata, Norio Ishida
Gaucher's disease in humans is considered a deficiency of glucocerebrosidase (GlcCerase) that result in the accumulation of its substrate, glucocerebroside (GlcCer). Although mouse models of Gaucher's disease have been reported from several laboratories, these models are limited due to the perinatal lethality of GlcCerase gene. Here, we examined phenotypes of Drosophila melanogaster homologues genes of the human Gaucher's disease gene by using Minos insertion. One of two Minos insertion mutants to unknown function gene (CG31414) accumulates the hydroxy-GlcCer in whole body of Drosophila melanogaster...
March 7, 2017: Gene
https://www.readbyqxmd.com/read/28282750/evening-electronic-device-use-the-effects-on-alertness-sleep-and-next-day-physical-performance-in-athletes
#7
Maddison J Jones, Peter Peeling, Brian Dawson, Shona Halson, Joanna Miller, Ian Dunican, Michael Clarke, Carmel Goodman, Peter Eastwood
The aim of the present study was to investigate the influence of different types of tasks performed with or without an electronic device (tablet) on pre-sleep alertness, subsequent sleep quality and next-day athletic performance. Eight highly trained netball players attended a sleep laboratory for pre-sleep testing, polysomnographic sleep monitoring and next-day physical performance testing on 5 separate occasions (1 familiarisation and 4 experimental sessions). For 2 h prior to bedtime, athletes completed cognitively stimulating tasks (puzzles) or passive tasks (reading) with or without a tablet...
February 14, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28276978/successfully-controlling-intrusive-memories-is-harder-when-control-must-be-sustained
#8
Kevin van Schie, Michael C Anderson
After unpleasant events, people often experience intrusive memories that undermine their peace of mind. In response, they often suppress these unwanted memories from awareness. Such efforts may fail, however, when inhibitory control demands are high due to the need to sustain control, or when fatigue compromises inhibitory capacity. Here we examined how sustained inhibitory demand affected intrusive memories in the Think/No-Think paradigm. To isolate intrusions, participants reported, trial-by-trial, whether their preceding attempt to suppress retrieval had triggered retrieval of the memory they intended to suppress...
February 21, 2017: Memory
https://www.readbyqxmd.com/read/28268987/identifying-individual-sleep-apnea-hypoapnea-epochs-using-smartphone-based-pulse-oximetry
#9
Ainara Garde, Parastoo Dekhordi, J Mark Ansermino, Guy A Dumont
Sleep apnea, characterized by frequent pauses in breathing during sleep, poses a serious threat to the healthy growth and development of children. Polysomnography (PSG), the gold standard for sleep apnea diagnosis, is resource intensive and confined to sleep laboratories, thus reducing its accessibility. Pulse oximetry alone, providing blood oxygen saturation (SpO2) and blood volume changes in tissue (PPG), has the potential to identify children with sleep apnea. Thus, we aim to develop a tool for at-home sleep apnea screening that provides a detailed and automated 30 sec epoch-by-epoch sleep apnea analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268910/estimation-of-macro-sleep-stages-from-whole-night-audio-analysis
#10
E Dafna, M Halevi, D Ben Or, A Tarasiuk, Y Zigel
During routine sleep diagnostic procedure, sleep is broadly divided into three states: rapid eye movement (REM), non-REM (NREM) states, and wake, frequently named macro-sleep stages (MSS). In this study, we present a pioneering attempt for MSS detection using full night audio analysis. Our working hypothesis is that there might be differences in sound properties within each MSS due to breathing efforts (or snores) and body movements in bed. In this study, audio signals of 35 patients referred to a sleep laboratory were recorded and analyzed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268908/bioradiolocation-based-sleep-stage-classification
#11
Alexander Tataraidze, Lyudmila Korostovtseva, Lesya Anishchenko, Mikhail Bochkarev, Yurii Sviryaev, Sergey Ivashov
This paper presents a method for classifying wakefulness, REM, light and deep sleep based on the analysis of respiratory activity and body motions acquired by a bioradar. The method was validated using data of 32 subjects without sleep-disordered breathing, who underwent a polysomnography study in a sleep laboratory. We achieved Cohen's kappa of 0.49 in the wake-REM-light-deep sleep classification, 0.55 for the wake-REM-NREM classification and 0.57 for the sleep/wakefulness determination. The results might be useful for the development of unobtrusive sleep monitoring systems for diagnostics, prevention, and management of sleep disorders...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268907/probabilistic-characterization-of-sleep-architecture-home-based-study-on-healthy-volunteers
#12
Gary Garcia-Molina, Sreeram Vissapragada, Anandi Mahadevan, Robert Goodpaster, Brady Riedner, Michele Bellesi, Giulio Tononi
The quantification of sleep architecture has high clinical value for diagnostic purposes. While the clinical standard to assess sleep architecture is in-lab based polysomnography, higher ecological validity can be obtained with multiple sleep recordings at home. In this paper, we use a dataset composed of fifty sleep EEG recordings at home (10 per study participant for five participants) to analyze the sleep stage transition dynamics using Markov chain based modeling. The statistical analysis of the duration of continuous sleep stage bouts is also analyzed to identify the speed of transition between sleep stages...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28266899/the-blue-lotus-flower-nymphea-caerulea-resin-used-in-a-new-type-of-electronic-cigarette-the-re-buildable-dripping-atomizer
#13
Justin L Poklis, Haley A Mulder, Matthew S Halquist, Carl E Wolf, Alphonse Poklis, Michelle R Peace
The blue lotus flower (Nymphea caerulea) is an Egyptian water lily containing apomorphine and nuciferine. Apomorphine has been described as a psychoactive alkaloid and is a non-selective dopamine agonist primarily used to treat Parkinson's disease as it stimulates dopamine receptors and improves motor function. Nuciferine is an alkaloid associated with dopamine receptor blockade. Today, blue lotus flower is used as a sleep aid and anxiety reliever. The rebuildable dripping atomizer (RDA) is an electronic cigarette that allows direct application of an e-liquid onto the coil in the atomizer for aerosolization, compared to a typical electronic cigarette where the e-liquid is wicked from a storage vessel to the coil...
March 7, 2017: Journal of Psychoactive Drugs
https://www.readbyqxmd.com/read/28253221/objective-short-sleep-duration-modifies-the-relationship-between-hypertension-and-all-cause-mortality
#14
Julio Fernandez-Mendoza, Fan He, Alexandros N Vgontzas, Duanping Liao, Edward O Bixler
OBJECTIVE: Short sleep duration has been associated with cardiovascular morbidity and mortality. However, previous studies were limited by using subjective sleep measures and treating sleep duration as a sole, independent predictor. Therefore, the role of sleep duration in predicting mortality is still not well understood. We posit that objective sleep duration is an effect modifier of the relationship between hypertension and all-cause mortality. METHODS: We addressed this question in the Penn State Adult Cohort, a random, general population sample of 1741 men and women (48...
April 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28251022/the-predictors-of-obesity-hypoventilation-syndrome-in-obstructive-sleep-apnea
#15
Aylin Pıhtılı, Züleyha Bingöl, Esen Kıyan
BACKGROUND: As obesity increases, the frequency of obstructive sleep apnea and obesity hypoventilation syndrome increases also. However, obesity hypoventilation syndrome frequency is not known, as capnography and arterial blood gas analysis are not routinely performed in sleep laboratories. AIMS: To investigate the frequency and predictors of obesity hypoventilation syndrome in obese subjects. STUDY DESIGN: Retrospective clinical study. METHODS: Obese subjects who had arterial blood gas analysis admitted to the sleep laboratory and polysomnography were retrospectively analyzed...
January 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28245865/can-tryptophan-supplement-intake-at-breakfast-enhance-melatonin-secretion-at-night
#16
Shunsuke Nagashima, Makoto Yamashita, Chiaki Tojo, Masayuki Kondo, Takeshi Morita, Tomoko Wakamura
BACKGROUND: Tryptophan (TRP) is an essential amino acid, and it has been suggested that TRP intake at breakfast combined with daytime bright light exposure can increase nocturnal melatonin secretion. However, the mechanisms involved are not yet clear. The aim of this study was to examine the effect of TRP supplement intake at breakfast on nocturnal melatonin secretion under different daytime light intensities in humans. METHOD: Twelve subjects (aged 21.3 ± 3...
February 28, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28243925/utility-of-home-sleep-apnea-testing-in-high-risk-veterans
#17
Alyssa Cairns, Kathleen Sarmiento, Richard Bogan
PURPOSE: Many Veterans Affairs Medical Centers (VAMCs) have implemented home sleep apnea testing (HSAT) in lieu of traditional in-lab testing to establish a timely and cost-sensitive diagnosis of obstructive sleep apnea (OSA). However, concern remains for the sensitivity and specificity of said technology in this population as many veterans are at increased risk for many of the comorbid conditions that can limit the accuracy of HSAT results. Hence, the purpose of this study is to evaluate rate of incongruent outcomes (e...
February 27, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28235749/analysis-of-patient-narratives-in-disease-blogs-on-the-internet-an-exploratory-study-of-social-pharmacovigilance
#18
Shinichi Matsuda, Kotonari Aoki, Shiho Tomizawa, Masayoshi Sone, Riwa Tanaka, Hiroshi Kuriki, Yoichiro Takahashi
BACKGROUND: Although several reports have suggested that patient-generated data from Internet sources could be used to improve drug safety and pharmacovigilance, few studies have identified such data sources in Japan. We introduce a unique Japanese data source: tōbyōki, which translates literally as "an account of a struggle with disease." OBJECTIVE: The objective of this study was to evaluate the basic characteristics of the TOBYO database, a collection of tōbyōki blogs on the Internet, and discuss potential applications for pharmacovigilance...
February 24, 2017: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/28235691/investigating-the-effect-of-acute-sleep-deprivation-on-hypothalamic-pituitary-adrenal-axis-response-to-a-psychosocial-stressor
#19
Ivan Vargas, Nestor Lopez-Duran
The hypothalamic-pituitary-adrenal (HPA) axis has been previously identified as one potential mechanism that may explain the link between sleep deprivation and negative health outcomes. However, few studies have examined the direct association between sleep deprivation and HPA-axis functioning, particularly in the context of stress. Therefore, the aim of the current study was to investigate the relationship between acute sleep deprivation and HPA-axis reactivity to a psychosocial stressor. Participants included 40 healthy, young adults between the ages of 18-29...
February 3, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28227197/identifying-individual-sleep-apnea-hypoapnea-epochs-using-smartphone-based-pulse-oximetry
#20
Ainara Garde, Parastoo Dekhordi, J Mark Ansermino, Guy A Dumont, Ainara Garde, Parastoo Dekhordi, J Mark Ansermino, Guy A Dumont, J Mark Ansermino, Parastoo Dekhordi, Guy A Dumont, Ainara Garde
Sleep apnea, characterized by frequent pauses in breathing during sleep, poses a serious threat to the healthy growth and development of children. Polysomnography (PSG), the gold standard for sleep apnea diagnosis, is resource intensive and confined to sleep laboratories, thus reducing its accessibility. Pulse oximetry alone, providing blood oxygen saturation (SpO2) and blood volume changes in tissue (PPG), has the potential to identify children with sleep apnea. Thus, we aim to develop a tool for at-home sleep apnea screening that provides a detailed and automated 30 sec epoch-by-epoch sleep apnea analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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