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Nature and Science of Sleep

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https://www.readbyqxmd.com/read/27920587/defining-the-rest-interval-associated-with-the-main-sleep-period-in-actigraph-scoring
#1
Chin Moi Chow, Shi Ngar Wong, Mirim Shin, Rebecca G Maddox, Kristy-Lee Feilds, Karen Paxton, Catherine Hawke, Philip Hazell, Katharine Steinbeck
Actigraphy is increasingly used for sleep monitoring. However, there is a lack of standardized methodology for data processing and analysis, which often makes between study comparisons difficult, if not impossible, and thus open to flawed interpretation. This study evaluated a manual method for detection of the rest interval in actigraph data collected with Actiwatch 2. The rest interval (time in bed), defined as the bedtime and rise time and set by proprietary software, is an essential requirement for the estimation of sleep indices...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27920586/the-relation-between-sleep-and-weight-in-a-suburban-sleep-center-observations-and-speculations-on-apnea-and-weight
#2
Robert G Hooper
STUDY OBJECTIVES: The relationship between obstructive sleep apnea (OSA) and body weight is not clearly established. In order to describe the relationship of weight and OSA severity seen in a suburban sleep center, an observational review was performed of initial diagnostic polysomnograms (PSGs) ordered on patients with American Academy of Sleep Medicine (AASM) symptomatic indications. METHODOLOGY/PRINCIPLE FINDINGS: Initial, full-night diagnostic or initial split-night (diagnostic portion) PSGs performed for any indication on patients >18 years old were retrospectively reviewed for a two year period...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27895522/effects-of-tai-chi-chuan-on-anxiety-and-sleep-quality-in-young-adults-lessons-from-a-randomized-controlled-feasibility-study
#3
Karen L Caldwell, Shawn M Bergman, Scott R Collier, N Travis Triplett, Rebecca Quin, John Bergquist, Carl F Pieper
OBJECTIVE: To determine feasibility and estimate the effect of a 10-week tai chi chuan (TCC) intervention on anxiety and sleep quality in young adults. PARTICIPANTS: Seventy-five adults (18-40 years) from a predominately undergraduate midsized university. METHODS: This was an assessor blinded, randomized feasibility trial, and participants were randomized into one of three groups: 10 weeks of TCC meeting 2 times per week, 10 weeks of TCC with a DVD of the curriculum, and control group receiving a handout on anxiety management...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27757056/epiglottis-cross-sectional-area-and-oropharyngeal-airway-length-in-male-and-female-obstructive-sleep-apnea-patients
#4
Melinda A Ma, Rajesh Kumar, Paul M Macey, Frisca L Yan-Go, Ronald M Harper
INTRODUCTION: Obstructive sleep apnea (OSA) is a male-predominant condition, characterized by repeated upper-airway collapse with continued diaphragmatic efforts during sleep, and is accompanied by severe physiological consequences. Multiple morphological aspects, including epiglottis cross-sectional area (CSA) and oropharyngeal airway length (OPAL), can contribute to airway collapsibility in the condition. This study focused on the effects of OSA severity, sex, and race on OPA dimensions...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27574478/hypnotic-effect-of-the-essential-oil-from-the-leaves-of-myrtus-communis-on-mice
#5
Muluken Walle Birhanie, Bizuayehu Walle, Kidist Rebba
BACKGROUND: Myrtus communis has been suggested as a sleep aid in unconventional medicine. Moreover, previous studies have also indicated its sedative- and hypnotic-like activity. In this study, the hypnotic effect of M. communis was investigated. METHODS: Essential oil (EO) of M. communis (600, 800, and 1,000 mg/kg) was given orally to Swiss albino mice of both sex, and the hypnotic effect was evaluated. In addition, the EO of M. communis (500, 600, 800, and 1,000 mg/kg) was administered orally to Swiss albino mice of both sex 60 minutes prior to pentobarbital injection (50 mg/kg)...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27570468/subjective-sleep-complaints-indicate-objective-sleep-problems-in-psychosomatic-patients-a-prospective-polysomnographic-study
#6
Michael Linden, Marie Dietz, Christian Veauthier, Ingo Fietze
OBJECTIVE: To elucidate the relationship between subjective complaints and polysomnographical parameters in psychosomatic patients. METHOD: A convenience sample of patients from a psychosomatic inpatient unit were classified according to the Pittsburgh Sleep Quality Index (PSQI) as very poor sleepers (PSQI >10, n=80) and good sleepers (PSQI <6, n=19). They then underwent a polysomnography and in the morning rated their previous night's sleep using a published protocol (Deutschen Gesellschaft für Schlafforschung und Schlafmedizin morning protocol [MP])...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27555802/clinical-predictors-of-central-sleep-apnea-evoked-by-positive-airway-pressure-titration
#7
Marilyn Moro, Karen Gannon, Kathy Lovell, Margaret Merlino, James Mojica, Matt T Bianchi
PURPOSE: Treatment-emergent central sleep apnea (TECSA), also called complex apnea, occurs in 5%-15% of sleep apnea patients during positive airway pressure (PAP) therapy, but the clinical predictors are not well understood. The goal of this study was to explore possible predictors in a clinical sleep laboratory cohort, which may highlight those at risk during clinical management. METHODS: We retrospectively analyzed 728 patients who underwent PAP titration (n=422 split-night; n=306 two-night)...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27540316/periodic-limb-movements-of-sleep-empirical-and-theoretical-evidence-supporting-objective-at-home-monitoring
#8
Marilyn Moro, Balaji Goparaju, Jelina Castillo, Yvonne Alameddine, Matt T Bianchi
INTRODUCTION: Periodic limb movements of sleep (PLMS) may increase cardiovascular and cerebrovascular morbidity. However, most people with PLMS are either asymptomatic or have nonspecific symptoms. Therefore, predicting elevated PLMS in the absence of restless legs syndrome remains an important clinical challenge. METHODS: We undertook a retrospective analysis of demographic data, subjective symptoms, and objective polysomnography (PSG) findings in a clinical cohort with or without obstructive sleep apnea (OSA) from our laboratory (n=443 with OSA, n=209 without OSA)...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27499652/a-novel-implantable-device-for-a-minimally-invasive-surgical-treatment-of-obstructive-sleep-apnea-design-and-preclinical-safety-assessment
#9
Edward Gillis, Charles Rampersaud, Emmanuelle Pease, Paul Buscemi
BACKGROUND: In obstructive sleep apnea (OSA), occlusion of the upper airway by soft tissue causes intermittent hypoxemia and can have serious sequelae. A novel implantable medical device for OSA is composed of a linear silicone elastic element held in an extended state by a bioabsorbable external sheath. The implant is delivered to the tongue base or soft palate via a minimally invasive approach. Normal tissue healing anchors the device at the attachment points before the bioabsorbable material dissolves and the elastic element contracts to stabilize the surrounding tissue...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27471419/novel-class-of-medications-orexin-receptor-antagonists-in-the-treatment-of-insomnia-critical-appraisal-of-suvorexant
#10
REVIEW
Jessica L Norman, Sarah L Anderson
Insomnia, a highly prevalent disorder, can be detrimental to patients' overall health and worsen existing comorbidities. Patients may have acute episodes of insomnia related to a traumatic event, but more commonly insomnia occurs chronically. While proper sleep hygiene and behavioral therapy play important roles in the nonpharmacologic management of short-term and chronic insomnia, medications may also be required. Historically, insomnia has been treated with agents such as benzodiazepines, nonbenzodiazepine receptor agonists, and melatonin agonists...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27471418/unihemispheric-sleep-and-asymmetrical-sleep-behavioral-neurophysiological-and-functional-perspectives
#11
REVIEW
Gian Gastone Mascetti
Sleep is a behavior characterized by a typical body posture, both eyes' closure, raised sensory threshold, distinctive electrographic signs, and a marked decrease of motor activity. In addition, sleep is a periodically necessary behavior and therefore, in the majority of animals, it involves the whole brain and body. However, certain marine mammals and species of birds show a different sleep behavior, in which one cerebral hemisphere sleeps while the other is awake. In dolphins, eared seals, and manatees, unihemispheric sleep allows them to have the benefits of sleep, breathing, thermoregulation, and vigilance...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27468254/which-oropharyngeal-factors-are-significant-risk-factors-for-obstructive-sleep-apnea-an-age-matched-study-and-dentist-perspectives
#12
Supanigar Ruangsri, Teekayu Plangkoon Jorns, Subin Puasiri, Thitisan Luecha, Chariya Chaithap, Kittisak Sawanyawisuth
OBJECTIVE: Obstructive sleep apnea (OSA) is a common sleep breathing disorder. Untreated OSA may lead to a number of cardiovascular complications. Dentists may play an important role in OSA detection by conducting careful oral examinations. This study focused on the correlation of oral anatomical features in Thai patients who presented with OSA. METHODS: We conducted a prospective comparative study at a sleep/hypertension clinic and a dental clinic at Khon Kaen University in Thailand...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27418862/the-role-of-sleep-in-bipolar-disorder
#13
REVIEW
Alexandra K Gold, Louisa G Sylvia
Bipolar disorder is a serious mental illness characterized by alternating periods of elevated and depressed mood. Sleep disturbances in bipolar disorder are present during all stages of the condition and exert a negative impact on overall course, quality of life, and treatment outcomes. We examine the partnership between circadian system (process C) functioning and sleep-wake homeostasis (process S) on optimal sleep functioning and explore the role of disruptions in both systems on sleep disturbances in bipolar disorder...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27418861/sex-differences-in-sleep-apnea-predictors-and-outcomes-from-home-sleep-apnea-testing
#14
Alyssa Cairns, Greg Poulos, Richard Bogan
STUDY OBJECTIVES: To evaluate sex differences in predictors of obstructive sleep apnea (OSA) as per outcomes from home sleep apnea testing. DESIGN: This was a retrospective analysis of a large repository of anonymous test results and pretest risk factors for OSA. SETTING AND PATIENTS: A total of 272,705 patients were referred for home sleep apnea testing from a variety of clinical practices for suspected sleep disordered breathing across North America from 2009 to 2013...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27382345/sex-specific-sleep-patterns-among-university-students-in-lebanon-impact-on-depression-and-academic-performance
#15
Colette S Kabrita, Theresa A Hajjar-Muça
Good sleep quality and quantity are fundamental to the maintenance of normal physiological processes. Changes in sleep patterns are commonly observed among young adults and are shown to impact neurocognitive, academic, and psychological well-being. Given the scarcity of sleep information about Lebanon and acknowledging the sex differences in various sleep dimensions, we conducted a study that aimed at assessing sex differences in sleep habits among university students in Lebanon in relation to psychoacademic status...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27354835/associations-of-self-reported-and-objectively-measured-sleep-disturbances-with-depression-among-primary-caregivers-of-children-with-disabilities
#16
Olivia R Orta, Clarita Barbosa, Juan Carlos Velez, Bizu Gelaye, Xiaoli Chen, Lee Stoner, Michelle A Williams
OBJECTIVE: The objective of this study was to determine the association between sleep and depression using both self-reported (subjective) and actigraphic (objective) sleep traits. METHODS: A cross-sectional study was conducted among 175 female primary caregivers of children with disabilities receiving care at a rehabilitation center in Punta Arenas, Chile. The eight-item Patient Health Questionnaire was used to ascertain participants' depression status. The Pittsburgh Sleep Quality Index was used to define subjective, or perceived, sleep quality...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27313482/circadian-regulation-of-metabolic-homeostasis-causes-and-consequences
#17
REVIEW
Graham R McGinnis, Martin E Young
Robust circadian rhythms in metabolic processes have been described in both humans and animal models, at the whole body, individual organ, and even cellular level. Classically, these time-of-day-dependent rhythms have been considered secondary to fluctuations in energy/nutrient supply/demand associated with feeding/fasting and wake/sleep cycles. Renewed interest in this field has been fueled by studies revealing that these rhythms are driven, at least in part, by intrinsic mechanisms and that disruption of metabolic synchrony invariably increases the risk of cardiometabolic disease...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27279749/discussion-of-causes-and-consequences-of-sleepiness-among-college-students-2014
#18
Brad Wolgast
No abstract text is available yet for this article.
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27274327/enhancements-to-the-multiple-sleep-latency-test
#19
Sonia Meza-Vargas, Eleni Giannouli, Magdy Younes
INTRODUCTION: The utility of multiple sleep latency tests (MSLTs) is limited to determining sleep onset latency (SOL) and rapid eye movement sleep latency. The odds ratio product (ORP) is a continuous index of sleep depth with values of 0, 1.0, and 2.5 reflecting very deep sleep, light sleep, and full wakefulness, respectively. We determined the time course of sleep depth during MSLT naps expecting that this would enhance the test's clinical utility. METHODS: Thirty MSLTs (150 naps) were performed for excessive somnolence...
2016: Nature and Science of Sleep
https://www.readbyqxmd.com/read/27217804/a-novel-implantable-device-for-the-treatment-of-obstructive-sleep-apnea-clinical-safety-and-feasibility
#20
Vaclav Pavelec, Brian W Rotenberg, Joachim T Maurer, Edward Gillis, Thomas Verse
OBJECTIVE: Many cases of obstructive sleep apnea (OSA) involve collapse of the tongue base and soft palate during sleep, causing occlusion of the upper airway and leading to oxygen desaturation. Existing therapies can be effective, but they are plagued by patient adherence issues and the invasiveness of surgical approaches. A new, minimally invasive implant for OSA has been developed, which is elastic and contracts a few weeks after deployment, stabilizing the surrounding soft tissue...
2016: Nature and Science of Sleep
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