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Sleep fragmentation

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https://www.readbyqxmd.com/read/28329381/the-effects-of-an-afternoon-nap-on-episodic-memory-in-young-and-older-adults-napping-and-aging
#1
Michael K Scullin, Jacqueline Fairley, Michael J Decker, Donald L Bliwise
Study Objectives: In young adults, napping is hypothesized to benefit episodic memory retention (e.g., via consolidation). Whether this relationship is present in older adults has not been adequately tested, but is an important question because older adults display marked changes in sleep and memory. Design: Between-subjects design. Setting: Sleep laboratory at Emory University School of Medicine. Participants: 50 healthy young adults (18-29) and 45 community dwelling older adults (58-83)...
March 1, 2017: Sleep
https://www.readbyqxmd.com/read/28329370/sleep-characteristics-and-daytime-cortisol-levels-in-older-adults
#2
Ethan Morgan, L Philip Schumm, Martha McClintock, Linda Waite, Diane S Lauderdale
Objective: Older adults frequently report sleep problems and are at increased risk for cardiometabolic disruption. Experimental sleep restriction of younger adults has suggested that cortisol may be on the pathway between sleep restriction and cardiometabolic disease. We investigated whether the natural variation in sleep among older adults is associated with daytime cortisol level. Methods: Salivary cortisol samples and actigraphy sleep data were collected from a random subsample of participants in the National Social Life, Health and Aging Project, a nationally-representative probability sample of adults aged 62-90 (N=672)...
March 9, 2017: Sleep
https://www.readbyqxmd.com/read/28329120/sleep-wake-disturbances-after-traumatic-brain-injury-synthesis-of-human-and-animal-studies
#3
Danielle K Sandsmark, Jonathan E Elliott, Miranda M Lim
Sleep-wake disturbances following traumatic brain injury (TBI) are increasingly recognized as a serious consequence following injury and as a barrier to recovery. Injury-induced sleep-wake disturbances can persist for years, often impairing quality of life. Recently, there has been a nearly exponential increase in the number of primary research articles published on the pathophysiology and mechanisms underlying sleep-wake disturbances after TBI, both in animal models and human subjects, including in the pediatric population...
March 17, 2017: Sleep
https://www.readbyqxmd.com/read/28329031/who-take-naps-self-reported-and-objectively-measured-napping-in-very-old-women
#4
Yue Leng, Katie Stone, Sonia Ancoli-Israel, Kenneth Covinsky, Kristine Yaffe
Background: Despite the widespread belief that napping is common among older adults, little is known about the correlates of napping. We examined the prevalence and correlates of self-reported and objectively measured napping among very old women. Methods: We studied 2,675 community-dwelling women (mean age 84.5 ± 3.7 years; range 79-96). Self-reported napping was defined as a report of regular napping for ≥1 hour per day. Individual objective naps were defined as ≥5 consecutive minutes of inactivity as measured by actigraphy and women were characterized as "objective nappers" if they had at least 60 minutes of naps per day...
February 18, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28326793/changes-in-habitual-sleep-duration-after-continuous-positive-airway-pressure-for-obstructive-sleep-apnea
#5
Ryo Tachikawa, Takuma Minami, Takeshi Matsumoto, Kimihiko Murase, Kiminobu Tanizawa, Morito Inouchi, Toru Oga, Kazuo Chin
RATIONALE: Obstructive sleep apnea (OSA) can affect not only sleep quality but also sleep duration. Determining the therapeutic effects of continuous positive airway pressure (CPAP) on habitual sleep profiles may shed light on the impact of OSA on sleep duration. OBJECTIVES: To determine whether and how CPAP affects habitual sleep duration in patients with OSA. METHODS: Assessments of sleep duration and sleep quality were performed on 57 newly diagnosed study subjects with OSA (46 men, median 63 years, apnea-hypopnea index >20 h-1) at baseline and 3 months after initiation of CPAP therapy...
March 22, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28300651/sleep-fragmentation-hypersensitizes-healthy-young-women-to-deep-and-superficial-experimental-pain
#6
Stella Iacovides, Kezia George, Peter Kamerman, Fiona C Baker
The effect of sleep deprivation on pain sensitivity has typically been studied using total and partial sleep deprivation protocols. These protocols do not mimic the fragmented pattern of sleep disruption usually observed in individuals with clinical pain conditions. Therefore, we conducted a controlled-experiment to investigate the effect of sleep fragmentation on pain perception (deep pain: forearm muscle ischaemia, and superficial pain: graded pin-pricks applied to the skin) in 11 healthy young women following two consecutive nights of sleep fragmentation, compared with a normal night of sleep...
March 11, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28271575/bedtime-shuteye-time-and-electronic-media-sleep-displacement-is-a-two-step-process
#7
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/28241159/timed-light-therapy-for-sleep-and-daytime-sleepiness-associated-with-parkinson-disease-a-randomized-clinical-trial
#8
Aleksandar Videnovic, Elizabeth B Klerman, Wei Wang, Angelica Marconi, Teresa Kuhta, Phyllis C Zee
Importance: Impaired sleep and alertness are some of the most common nonmotor manifestations of Parkinson disease (PD) and currently have only limited treatment options. Light therapy (LT), a widely available treatment modality in sleep medicine, has not been systematically studied in the PD population. Objective: To determine the safety and efficacy of LT on excessive daytime sleepiness (EDS) associated with PD. Design, Settings, and Participants: This randomized, placebo-controlled, clinical intervention study was set in PD centers at Northwestern University and Rush University...
February 20, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28236784/effects-of-donepezil-on-sleep-disturbances-in-patients-with-dementia-with-lewy-bodies-an-open-label-study-with-actigraphy
#9
Hiroaki Kazui, Hiroyoshi Adachi, Hideki Kanemoto, Kenji Yoshiyama, Tamiki Wada, Keiko Tokumasu Nomura, Toshihisa Tanaka, Manabu Ikeda
We investigated whether donepezil, a cholinesterase inhibitor, can be used to treat sleep disturbances in patients with dementia with Lewy bodies (DLB). Sleep disturbances were evaluated with the sleep disturbances item of the Neuropsychiatric inventory (NPI) and an actigraph in 16 DLB patients and 24 normal elderly control (NC) subjects. The presence/absence of nine kinds of sleep symptoms, such as dream enactment, were also evaluated in the DLB patients. The DLB patients were then given 5mg/day donepezil for 14 weeks and evaluated again...
February 20, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28215231/use-of-varenicline-in-smokeless-tobacco-cessation-influences-sleep-quality-and-dream-recall-frequency-but-not-dream-affect
#10
Francesca Polini, Rosastella Principe, Serena Scarpelli, Francesca Clementi, Luigi De Gennaro
OBJECTIVE: Varenicline (VCL) treatment has become popular as a part of smoking-cessation therapies, even though its possible implications in neuropsychiatric adverse events include abnormal sleep and nightmares. Our study is the first aimed at prospectively investigating changes in sleep and dream measures across such treatment by using a one week sleep diary and collecting dream recall (DR). METHODS: Thirty-eight smokers participated in two different effective smoking-cessation programs: 25 subjects received VCL, 13 subjects received nicotine replacement therapy (NRT)...
February 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28212689/sleep-complaints-and-sleep-architecture-in-children-with-idiopathic-central-sleep-apnea
#11
Neepa Gurbani, Stijn L Verhulst, Chee Tan, Narong Simakajornboon
STUDY OBJECTIVES: Idiopathic central sleep apnea (ICSA) is categorized as a type of nonhypercapnic central sleep apnea (CSA). Recurrent cessation and resumption of respiration leads to sleep fragmentation, which causes excessive daytime sleepiness, frequent nocturnal awakenings, or both. ICSA has been described in the adult population but there is limited information in children. The purpose of this study was to describe clinical manifestations and polysomnographic findings in children with ICSA...
February 15, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28186315/sleep-study-in-disruptive-mood-dysregulation-disorder-and-bipolar-children
#12
Xavier Estrada-Prat, Ion Álvarez-Guerrico, María J Bleda-Hernández, Ester Camprodon-Rosanas, Santiago Batlle-Vila, Elena Pujals-Altes, María T Nascimento-Osorio, Luís M Martín-López, Enric Álvarez-Martínez, Víctor Pérez-Solá, Soledad Romero-Cela
INTRODUCTION: Decreased need for sleep has been proposed as a core symptom of mania and it has been associated with the pathogenesis of Bipolar Disorder. The emergence of Disruptive Mood Dysregulation Disorder (DMDD) as a new diagnostic has been controversial and much has been speculated about its relationship with the bipolar spectrum. REM sleep fragmentation could be a biomarker of affective disorders and it would help us to differentiate them from other disorders. METHOD: Polysomnographic cross-sectional study of children with DMDD, bipolar disorder and Attention Deficit Hyperactivity Disorder (ADHD)...
January 2017: Actas Españolas de Psiquiatría
https://www.readbyqxmd.com/read/28180055/associations-among-physical-activity-screen-time-and-sleep-in-low-socioeconomic-status-urban-girls
#13
Cory J Greever, Matthew Ahmadi, John Sirard, Sofiya Alhassan
Insufficient sleep is associated with higher risk of poor health outcomes in low socioeconomic status (SES) urban elementary age girls. Decreased physical activity (PA) and increased screen time may be associated with poor sleep. This study examined if PA and screen time are associated with sleep in girls from a low SES urban community. Baseline data from 7 to 12 year-old girls (n = 55) from two interventions conducted in Springfield, MA between 2012 and 2015 were used. PA was measured via accelerometry for seven days...
March 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/28169087/adolescents-at-clinical-high-risk-for-psychosis-circadian-rhythm-disturbances-predict-worsened-prognosis-at-1-year-follow-up
#14
Jessica R Lunsford-Avery, Bruno da Silva Brandão Gonçalves, Elisa Brietzke, Rodrigo A Bressan, Ary Gadelha, Randy P Auerbach, Vijay A Mittal
BACKGROUND: Individuals with psychotic disorders experience disruptions to both the sleep and circadian components of the sleep/wake cycle. Recent evidence has supported a role of sleep disturbances in emerging psychosis. However, less is known about how circadian rhythm disruptions may relate to psychosis symptoms and prognosis for adolescents with clinical high-risk (CHR) syndromes. The present study examines circadian rest/activity rhythms in CHR and healthy control (HC) youth to clarify the relationships among circadian rhythm disturbance, psychosis symptoms, psychosocial functioning, and the longitudinal course of illness...
February 4, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28165541/obstructive-sleep-disordered-breathing-enuresis-and-combined-disorders-in-children-chance-or-related-association
#15
Marco Zaffanello, Giorgio Piacentini, Giuseppe Lippi, Vassilios Fanos, Emma Gasperi, Luana Nosetti
Nocturnal enuresis is usually diagnosed and treated by a primary paediatrician or family practitioner; if there is any doubt, the children may be referred to a paediatric urologist. Obstructive sleep-disordered breathing is a complex, multifactorial disorder. Adenotonsillar hypertrophy is considered an important factor associated with obstructive sleep apnoea syndrome. Enuresis and obstructive sleep-disordered breathing are both frequent problems of sleep in childhood. We conducted an electronic search in Medline, Scopus and the ISI Web of Science to look for published material and identify a putative link between nocturnal enuresis and obstructive sleep-disordered breathing...
February 6, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28161892/osa-and-cardiometabolic-risk-what-s-the-bottom-line
#16
REVIEW
Camilla M Hoyos, Luciano F Drager, Sanjay R Patel
Obstructive sleep apnoea (OSA) is a common condition characterized by repetitive upper airway obstruction during sleep. OSA promotes wide intrathoracic pressure swings, intermittent hypoxia and sleep fragmentation. Growing evidence derived from animal models mimicking the oxygen profile observed in patients with OSA as well as clinical studies support that this important sleep-disordered breathing is associated with increased cardiovascular risk. Although the precise mechanisms are not fully established, it is conceivable that the metabolic deregulation promoted by the components of OSA may have an important causal role in the poor cardiovascular prognosis...
April 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28159094/socioeconomic-impact-of-pediatric-sleep-disorders
#17
REVIEW
Kin M Yuen, Rafael Pelayo
Pediatric disorders tend to affect the immediate support unit, adults and children. High costs for direct consumption of medical care are offset by early diagnosis and treatment of pediatric sleep disorders. Pediatric sleep disorders are underdiagnosed and undertreated. Attention-deficit/hyperactivity disorder may result from insufficient or fragmented sleep. Delaying school start time resulted in decreased car crashes in teen drivers and improved mood.
March 2017: Sleep Medicine Clinics
https://www.readbyqxmd.com/read/28145903/the-aging-clock-circadian-rhythms-and-later-life
#18
REVIEW
Suzanne Hood, Shimon Amir
Circadian rhythms play an influential role in nearly all aspects of physiology and behavior in the vast majority of species on Earth. The biological clockwork that regulates these rhythms is dynamic over the lifespan: rhythmic activities such as sleep/wake patterns change markedly as we age, and in many cases they become increasingly fragmented. Given that prolonged disruptions of normal rhythms are highly detrimental to health, deeper knowledge of how our biological clocks change with age may create valuable opportunities to improve health and longevity for an aging global population...
February 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28139216/integrated-stress-response-activation-by-sleep-fragmentation-during-late-gestation-in-mice-leads-to-emergence-of-adverse-metabolic-phenotype-in-offspring
#19
Wojciech Trzepizur, Abdelnaby Khalyfa, Zhuanhong Qiao, Brian Popko, David Gozal
BACKGROUND: Late gestational sleep fragmentation (SF) is highly prevalent particularly in obese women, and induces metabolic dysfunction in adult offspring mice. SF induces activation of the integrated stress response (ISR), which might be involved in metabolic disorders. We hypothesized that adult offspring of double mutant mice (DM) involving the critical ISR genes CHOP and GADD34 would be protected from developing obesity and insulin resistance following SF. METHODS: Time-pregnant CHOP/GADD34 DM and wild type (WT) mice were randomly assigned to sleep control (SC) or SF conditions during the last 5days of gestation...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28128991/associations-between-nocturnal-urinary-6-sulfatoxymelatonin-obstructive-sleep-apnea-severity-and-glycemic-control-in-type-2-diabetes
#20
Sirimon Reutrakul, Nantaporn Siwasaranond, Hataikarn Nimitphong, Sunee Saetung, Naricha Chirakalwasan, La-Or Chailurkit, Kriangsuk Srijaruskul, Boonsong Ongphiphadhanakul, Ammarin Thakkinstian
Reduced nocturnal secretion of melatonin, a pineal hormone under circadian control, and obstructive sleep apnea have been both identified as risk factors for the development of type 2 diabetes mellitus. Whether they interact to impact glycemic control in patients with existing type 2 diabetes is not known. Therefore, this study explores the relationships between obstructive sleep apnea, melatonin and glycemic control in type 2 diabetes. As diabetic retinopathy may affect melatonin secretion, we also explore the relationship between retinopathy, melatonin and glycemic control...
2017: Chronobiology International
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