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https://www.readbyqxmd.com/read/28928479/decline-of-long-range-temporal-correlations-in-the-human-brain-during-sustained-wakefulness
#1
Christian Meisel, Kimberlyn Bailey, Peter Achermann, Dietmar Plenz
Sleep is crucial for daytime functioning, cognitive performance and general well-being. These aspects of daily life are known to be impaired after extended wake, yet, the underlying neuronal correlates have been difficult to identify. Accumulating evidence suggests that normal functioning of the brain is characterized by long-range temporal correlations (LRTCs) in cortex, which are supportive for decision-making and working memory tasks. Here we assess LRTCs in resting state human EEG data during a 40-hour sleep deprivation experiment by evaluating the decay in autocorrelation and the scaling exponent of the detrended fluctuation analysis from EEG amplitude fluctuations...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28923185/sleep-duration-trends-and-trajectories-among-youth-in-the-compass-study
#2
Karen A Patte, Wei Qian, Scott T Leatherdale
OBJECTIVES: Limited Canadian studies have examined youth sleep over time. This study explored sleep duration over recent years among youth, patterns over the course of secondary school, and subgroups at greater risk of sleep deprivation and problematic trajectories. DESIGN: Longitudinal survey. PARTICIPANTS/SETTING: Secondary school students in Ontario and Alberta, Canada. MEASURES AND ANALYSES: In cross-sectional analyses, student-reported sleep duration was analyzed in three waves of the COMPASS study (Y2: 2013/2014, Y3: 2014/2015, Y4: 2015/2016), and differences by student-level (race/ethnicity, grade, sex) and school-level (urbanicity, median household income) variables were tested in the most recent wave...
October 2017: Sleep Health
https://www.readbyqxmd.com/read/28922589/higher-baseline-proinflammatory-cytokines-mark-poor-antidepressant-response-in-bipolar-disorder
#3
Francesco Benedetti, Sara Poletti, Thomas A Hoogenboezem, Clara Locatelli, Harm de Wit, Annemarie J M Wijkhuijs, Cristina Colombo, Hemmo A Drexhage
BACKGROUND: The clinical relevance of raised levels of circulating cytokines in bipolar disorder is still unclear. Cytokines influence neurotransmitters, neuroplasticity, and white matter integrity. An inconsistent literature suggests that higher cytokine levels could hamper antidepressant response. Total sleep deprivation (TSD) and light therapy (LT) prompt a rapid antidepressant response and can provide a model treatment to study predictors of response. METHODS: We studied at baseline 15 immune-regulating compounds in 37 consecutively admitted inpatients with a major depressive episode in the course of bipolar disorder (DSM-5 criteria) and in 24 controls...
September 12, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28922421/effects-of-acute-administration-of-donepezil-or-memantine-on-sleep-deprivation-induced-spatial-memory-deficit-in-young-and-aged-non-human-primate-grey-mouse-lemurs-microcebus-murinus
#4
Anisur Rahman, Yves Lamberty, Esther Schenker, Massimo Cella, Solène Languille, Régis Bordet, Jill Richardson, Fabien Pifferi, Fabienne Aujard
The development of novel therapeutics to prevent cognitive decline of Alzheimer's disease (AD) is facing paramount difficulties since the translational efficacy of rodent models did not resulted in better clinical results. Currently approved treatments, including the acetylcholinesterase inhibitor donepezil (DON) and the N-methyl-D-aspartate antagonist memantine (MEM) provide marginal therapeutic benefits to AD patients. There is an urgent need to develop a predictive animal model that is phylogenetically proximal to humans to achieve better translation...
2017: PloS One
https://www.readbyqxmd.com/read/28920706/do-night-and-around-the-clock-firefighters-shift-schedules-induce-deviation-in-tau-from-24-hours-of-systolic-and-diastolic-blood-pressure-circadian-rhythms
#5
Alain E Reinberg, Michael H Smolensky, Marc Riedel, Cedric Riedel, Eric Brousse, Yvan Touitou
Systolic (S) and diastolic (D) blood pressures (BP) [SBP and DBP] are circadian rhythmic with period (τ) in healthy persons assumed to be maintained at 24.0h. We tested this assumption in a sample of 30 healthy career (mean >12 yrs) 30-to-46 yr-old male Caucasian French firefighters (FFs) categorized into three groups according to work schedule and duties: Group A - 12 FFs working 12h day, 12h night, and occasionally 24h shifts and whose primary duties are firefighting plus paramedical and road rescue services; Group B - 9 FFs working mostly 12h day and 12h night shifts and whose duties are answering incoming emergency calls and coordinating service vehicle dispatch from fire stations with Group A personnel; Group C - 9 day shift (09:00-17:00h) FFs charged with administrative tasks...
September 18, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28913770/sleep-deprived-and-overwhelmed-sleep-behaviors-of-medical-students-in-the-usa
#6
EDITORIAL
Frederick Grady, Laura Weiss Roberts
No abstract text is available yet for this article.
September 14, 2017: Academic Psychiatry
https://www.readbyqxmd.com/read/28912724/abnormalities-in-the-polysomnographic-adenosine-and-metabolic-response-to-sleep-deprivation-in-an-animal-model-of-hyperammonemia
#7
Selena Marini, Olena Santangeli, Pirjo Saarelainen, Benita Middleton, Namrata Chowdhury, Debra J Skene, Rodolfo Costa, Tarja Porkka-Heiskanen, Sara Montagnese
Patients with liver cirrhosis can develop hyperammonemia and hepatic encephalopathy (HE), accompanied by pronounced daytime sleepiness. Previous studies with healthy volunteers show that experimental increase in blood ammonium levels increases sleepiness and slows the waking electroencephalogram. As ammonium increases adenosine levels in vitro, and adenosine is a known regulator of sleep/wake homeostasis, we hypothesized that the sleepiness-inducing effect of ammonium is mediated by adenosine. Eight adult male Wistar rats were fed with an ammonium-enriched diet for 4 weeks; eight rats on standard diet served as controls...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28912034/sleep-deprivation-induces-spatial-memory-impairment-by-altered-hippocampus-neuroinflammatory-responses-and-glial-cells-activation-in-rats
#8
Meetu Wadhwa, Punita Kumari, Garima Chauhan, Koustav Roy, Shahnawaz Alam, Krishna Kishore, Koushik Ray, Usha Panjwani
We aimed to investigate the glial cells activation as a potential mechanism involved in the sleep deprivation (SD) induced cognitive impairment through changes in inflammatory cytokines. We analyzed the spatial memory, inflammatory cytokine levels, and gliosis during SD. SD induced spatial memory impairment, imbalance of inflammatory (increased pro- and decreased anti-) cytokines in both hippocampus and plasma in association with glial cells activation in the hippocampus of sleep-deprived rats were observed...
September 7, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28905326/circadian-rhythms-sleep-and-cognitive-skills-evidence-from-an-unsleeping-giant
#9
Osea Giuntella, Wei Han, Fabrizio Mazzonna
This study analyzes the effects of sleep duration on cognitive skills and depression symptoms of older workers in urban China. Cognitive skills and mental health have been associated with sleep duration and are known to be strongly related to economic behavior and performance. However, causal evidence is lacking, and little is known about sleep deprivation in developing countries. We exploit the relationship between circadian rhythms and bedtime to identify the effects of sleep using sunset time as an instrument...
September 13, 2017: Demography
https://www.readbyqxmd.com/read/28900617/serum-and-brain-metabolomic-variations-reveal-perturbation-of-sleep-deprivation-on-rats-and-ameliorate-effect-of-total-ginsenoside-treatment
#10
Xiao-Jun Gou, Fang Cen, Zi-Quan Fan, Ying Xu, Hong-Yi Shen, Ming-Mei Zhou
Sleep loss or sleep deprivation (SD) refers to shorter sleep than average baseline need, and SD has been a serious problem of modern societies which affects health and well-being. Panax ginseng is a well-known traditional Chinese medicine (TCM). Our previous study has demonstrated that total ginsenosides (GS), the extracts from Panax ginseng, could effectively improve cognition and behavior on SD rats. However, little is known about its metabolomic study. In this study, serum and brain metabolomic method based on gas chromatography coupled with mass spectrometry (GC/MS) was employed to evaluate the efficacy and study the mechanism of GS on a rat model of SD...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28899538/relationship-between-stress-coping-and-sleep-disorders-among-the-general-japanese-population-a-nationwide-representative-survey
#11
Yuichiro Otsuka, Yoshitaka Kaneita, Osamu Itani, Sachi Nakagome, Maki Jike, Takashi Ohida
OBJECTIVE: To clarify the prevalence of stress, and examine the relationship between sleep disorders and stress coping strategies among highly stressed individuals in the general Japanese population. METHODS: A cross-sectional nationwide survey was undertaken in November 2007. Men and women were randomly selected from 300 districts throughout Japan. Data from 7671 (3532 men (average age 53.5 ± 17.0 years) and 4139 women (average age 53.9 ± 17.7 years)) were analyzed...
September 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28899532/the-association-between-disruptive-mood-dysregulation-disorder-symptoms-and-sleep-problems-in-children-with-and-without-adhd
#12
James G Waxmonsky, Susan D Mayes, Susan L Calhoun, Julio Fernandez-Mendoza, Daniel A Waschbusch, Brianna H Bendixsen, Edward O Bixler
BACKGROUND: Many youth experience persistent irritability and recurrent temper outbursts, conceptualized by DSM-5 as Disruptive Mood Dysregulation Disorder (DMDD). Sleep deprivation impairs emotion regulation which could increase rates of DMDD symptoms, especially in those with preexisting regulatory impairments, as seen with ADHD. However, there has been little examination of the relationship between chronic sleep problems and DMDD symptoms. METHODS: Associations between DMDD symptoms and sleep parameters in children were assessed using parent-report and objective measures of sleep in a general population sample (N = 665) and an ADHD sample (N = 784)...
September 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28899014/slow-wave-sleep-disruption-increases-cerebrospinal-fluid-amyloid-%C3%AE-levels
#13
Yo-El S Ju, Sharon J Ooms, Courtney Sutphen, Shannon L Macauley, Margaret A Zangrilli, Gina Jerome, Anne M Fagan, Emmanuel Mignot, John M Zempel, Jurgen A H R Claassen, David M Holtzman
See Mander et al. (doi:10.1093/awx174) for a scientific commentary on this article.Sleep deprivation increases amyloid-β, suggesting that chronically disrupted sleep may promote amyloid plaques and other downstream Alzheimer's disease pathologies including tauopathy or inflammation. To date, studies have not examined which aspect of sleep modulates amyloid-β or other Alzheimer's disease biomarkers. Seventeen healthy adults (age 35-65 years) without sleep disorders underwent 5-14 days of actigraphy, followed by slow wave activity disruption during polysomnogram, and cerebrospinal fluid collection the following morning for measurement of amyloid-β, tau, total protein, YKL-40, and hypocretin...
August 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28894254/theta-waves-in-children-s-waking-electroencephalogram-resemble-local-aspects-of-sleep-during-wakefulness
#14
Sara Fattinger, Salome Kurth, Maya Ringli, Oskar G Jenni, Reto Huber
Vyazovskiy and colleagues found in rats' multi-unit recordings brief periods of silence (off-states) in local populations of cortical neurons during wakefulness which closely resembled the characteristic off-states during sleep. These off-states became more global and frequent with increasing sleep pressure and were associated with the well-known increase of theta activity under sleep deprivation in the surface EEG. Moreover, the occurrence of such off-states was related to impaired performance. While these animal experiments were based on intracranial recordings, we aimed to explore whether the human surface EEG may also provide evidence for such a local sleep-like intrusion during wakefulness...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893376/regulation-of-sleep-homeostasis-by-sexual-arousal
#15
Esteban J Beckwith, Quentin Geissmann, Alice S French, Giorgio F Gilestro
In all animals, sleep pressure is under continuous tight regulation. It is universally accepted that this regulation arises from a two-process model, integrating both a circadian and a homeostatic controller. Here we explore the role of environmental social signals as a third, parallel controller of sleep homeostasis and sleep pressure. We show that, in Drosophila melanogaster males, sleep pressure after sleep deprivation can be counteracted by raising their sexual arousal, either by engaging the flies with prolonged courtship activity or merely by exposing them to female pheromones...
September 12, 2017: ELife
https://www.readbyqxmd.com/read/28892758/seizure-self-prediction-myth-or-missed-opportunity
#16
REVIEW
Michael Mackay, Hector Mahlaba, Erika Gavillet, Roger G Whittaker
PURPOSE: Many patients report being able to predict their own seizures, and yet most seizures appear to strike out of the blue. This inherent contradiction makes the topic of seizure self-prediction controversial as well as difficult to study. Here we review the evidence for whether this ability exists, how many patients are capable of self-prediction and the nature of this capability, and whether this could provide a target for intervention. METHODS: Systematic searches of bibliographic databases including MEDLINE, EMBASE and PsycINFO through OVID were performed to identify relevant papers which were then screened by the study authors for inclusion in the study...
September 1, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28888616/physical-functioning-and-risk-for-sleep-disorders-in-us-adults-results-from-the-national-health-and-nutrition-examination-survey-2005-2014
#17
S Puri, J E Herrick, J P Collins, M Aldhahi, B Baattaiah
OBJECTIVES: Sleep disorders (SDs), particularly problems with falling asleep or daytime sleepiness, have negative impact on health and longevity. Sleep deprivation is also associated with a decline in physical functioning (PF) that mediates the ability to perform activities of daily living. But it remains unknown if deterioration in PF can predict the risk of having a SD. Therefore, the purpose of the present study is to assess the risk of SD associated with PF status in the US adult population...
September 7, 2017: Public Health
https://www.readbyqxmd.com/read/28882740/effect-of-sleep-deprivation-after-a-night-shift-duty-on-simulated-crisis-management-by-residents-in-anaesthesia-a-randomised-crossover-study
#18
Ségolène Arzalier-Daret, Clément Buléon, Marie-Laure Bocca, Pierre Denise, Jean-Louis Gérard, Jean-Luc Hanouz
BACKGROUND: Sleep deprivation has been associated with an increased incidence of medical errors and can jeopardise patients' safety during medical crisis management. The aim of the study was to assess the effect of sleep deprivation on the management of simulated anaesthesia crisis by residents in anaesthesiology. METHODS: A randomised, comparative, monocentric crossover study involving 48 residents in anaesthesia was performed on a high fidelity patient simulator...
September 4, 2017: Anaesthesia, Critical Care & Pain Medicine
https://www.readbyqxmd.com/read/28880357/-the-use-of-dexmedetomidine-in-extreme-agitation
#19
E Roosens, J P Mulier, G Heylens, J De Fruyt
In clinical practice antipsychotics, benzodiazepines and/or antihistamines are used to calm agitated patients. If agitation persists and patients have contraindications for these substances, then anesthetics, such as propofol, can also be used as well, to serve as a sedative. Our attention was drawn to a particular case in which dexmedetomidine was used as a sedative.<br/> AIM: To study the literature on the use of α2-agonists, such as dexmedetomidine, in the treatment of extreme agitation.<br/> METHOD: We reviewed the relevant scientific literature...
2017: Tijdschrift Voor Psychiatrie
https://www.readbyqxmd.com/read/28878629/higher-arc-nucleus-to-cytoplasm-ratio-during-sleep-in-the-superficial-layers-of-the-mouse-cortex
#20
Sakiko Honjoh, Luisa de Vivo, Hiroyuki Okuno, Haruhiko Bito, Giulio Tononi, Chiara Cirelli
The activity-regulated cytoskeleton associated protein Arc is strongly and quickly upregulated by neuronal activity, synaptic potentiation and learning. Arc entry in the synapse is followed by the endocytosis of glutamatergic AMPA receptors (AMPARs), and its nuclear accumulation has been shown in vitro to result in a small decline in the transcription of the GluA1 subunit of AMPARs. Since these effects result in a decline in synaptic strength, we asked whether a change in Arc dynamics may temporally correlate with sleep-dependent GluA1 down-regulation...
2017: Frontiers in Neural Circuits
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