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https://www.readbyqxmd.com/read/28433628/ca-2-dependent-hyperpolarization-hypothesis-for-mammalian-sleep
#1
REVIEW
Fumiya Tatsuki, Koji L Ode, Hiroki R Ueda
The detailed molecular mechanisms underlying the regulation of sleep/wake cycles in mammals are elusive. In this regulation, at least two mechanisms with fast and slow time scales are involved. In the faster time scale, a state of non-rapid-eye-movement (NREM) sleep can be microscopically characterized by the millisecond-to-second-order electrical behavior of neurons, namely slow-wave oscillations described by electrophysiology. In the slower time scale, the total duration of NREM sleep is homeostatically regulated by sleep pressure (the need for sleep), which is usually sustained for hours or even days and can be macroscopically described by electroencephalogram (EEG)...
April 19, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28432855/a-systematic-review-of-psychotherapeutic-interventions-for-women-with-metastatic-breast-cancer-context-matters
#2
REVIEW
Lisa Beatty, Emma Kemp, Phyllis Butow, Afaf Girgis, Penelope Schofield, Jane Turner, Nicholas J Hulbert-Williams, Janelle V Levesque, Bogda Koczwara
OBJECTIVES: To summarise the evidence-base of psychological interventions for women with metastatic breast cancer (MBC), by mode of delivery (group, individual, or low-intensity interventions). To synthesise data regarding core intervention-elements (e.g., intervention duration) and context factors (trial setting, uptake and adherence, demographic characteristics). METHODS: Four databases were searched (inception - May 2016): MEDLINE (OvidSP), PsycINFO (OvidSP), CINAHL (EBSCO), and SCOPUS; reference lists were examined for additional publications...
April 22, 2017: Psycho-oncology
https://www.readbyqxmd.com/read/28432269/altered-sleep-patterns-in-patients-with-non-functional-ghrh-receptor
#3
Francielle T Oliveira, Roberto Salvatori, Jose' Marcondes, Larissa B Macena, Alecia A Oliveira-Santos, Augusto Cn Faro, Viviane C Campos, Carla R Oliveira, Ursula Mm Costa, Manuel Aguiar-Oliveira
OBJECTIVES: GH releasing hormone (GHRH) exerts hypnotic actions increasing non-rapid eye movement (NREM) sleep. Conversely, GH stimulates REM sleep. GH deficiency (GHD) often leads to sleep problems, daytime fatigue, and reduced quality of life (QoL). GHD may be due to lack of hypothalamic GHRH or destruction of somatotroph cells. We have described a cohort with isolated GHD (IGHD) due to GHRH resistance caused by a homozygous null mutation in the GHRH receptor gene. They have normal QoL and no obvious complaints of chronic tiredness...
April 21, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28432140/visually-evoked-3-5-hz-membrane-potential-oscillations-reduce-the-responsiveness-of-visual-cortex-neurons-in-awake-behaving-mice
#4
Michael C Einstein, Pierre-Olivier Polack, Duy T Tran, Peyman Golshani
Low frequency membrane potential (Vm) oscillations were once thought to only occur in sleeping and anesthetized states. Recently, low frequency Vm oscillations have been described in inactive awake animals, but it is unclear if they shape sensory processing in neurons and whether they occur during active awake behavioral states. To answer these questions, we performed two-photon guided whole-cell Vm recordings from primary visual cortex layer 2/3 excitatory and inhibitory neurons in awake mice during passive visual stimulation and performance of visual and auditory discrimination tasks...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432135/molecular-mechanisms-of-sleep-homeostasis-in-flies-and-mammals
#5
Ravi Allada, Chiara Cirelli, Amita Sehgal
Sleep is homeostatically regulated with sleep pressure accumulating with the increasing duration of prior wakefulness. Yet, a clear understanding of the molecular components of the homeostat, as well as the molecular and cellular processes they sense and control to regulate sleep intensity and duration, remain a mystery. Here, we will discuss the cellular and molecular basis of sleep homeostasis, first focusing on the best homeostatic sleep marker in vertebrates, slow wave activity; second, moving to the molecular genetic analysis of sleep homeostasis in the fruit fly Drosophila; and, finally, discussing more systemic aspects of sleep homeostasis...
April 21, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28431823/sleepiness-and-activity-in-heart-failure-patients-with-reduced-ejection-fraction-and-central-sleep-disordered-breathing
#6
Angela Atalla, Thomas W Carlisle, Anita K Simonds, Martin R Cowie, Mary J Morrell
OBJECTIVE: Patients with heart failure (HF) and sleep disordered breathing (SDB) are typically not sleepy, unlike patients without heart failure. Previous work in HF patients with obstructive SDB suggested that sleepiness was associated with a reduction in daytime activity. The consequences of predominately central SDB on sleepiness in HF are less well understood. The aim of this study was to test the hypothesis that subjective sleepiness is associated with reduced daytime activity in HF patients with central SDB, compared to those without SDB...
January 23, 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28431177/altered-functional-connectivity-in-idiopathic-rapid-eye-movement-sleep-behavior-disorder-a-resting-state-eeg-study
#7
Jun-Sang Sunwoo, Sanghun Lee, Jung-Hoon Kim, Jung-Ah Lim, Tae-Joon Kim, Jung-Ick Byun, Min Hee Jeong, Kwang Su Cha, Jeong Woo Choi, Kyung Hwan Kim, Soon-Tae Lee, Keun-Hwa Jung, Kyung-Il Park, Kon Chu, Manho Kim, Sang Kun Lee, Ki-Young Jung
Study Objectives: Idiopathic rapid eye movement sleep behavior disorder (iRBD) is considered as a prodromal stage of synucleinopathy. Although loss of functional connectivity is implicated in neurodegenerative diseases, network characteristics of electroencephalography (EEG) in iRBD are unknown. Therefore, we evaluated resting-state EEG functional connectivity to identify the brain network changes in patients with iRBD. Methods: We prospectively enrolled 20 patients with polysomnography-confirmed iRBD and 16 control subjects...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28431171/heritability-of-heart-rate-response-to-arousals-in-twins
#8
Xiaoling Gao, Ali Azarbarzin, Brendan T Keenan, Michele Ostrowski, Frances M Pack, Bethany Staley, Greg Maislin, Allan I Pack, Magdy Younes, Samuel T Kuna
Objectives: To determine if the large and highly reproducible inter-individual differences in arousal intensity and heart rate response to arousal (ΔHR) during non-REM sleep are heritable. Methods: Polysomnograms of 55 monozygotic (14 male and 41 female pairs) and 36 dizygotic (15 male and 21 female pairs) same-sex twin pairs were analyzed. Arousals were scored using the 2012 American Academy of Sleep Medicine criteria. Arousal intensity was scaled (between 0 and 9) using an automatic algorithm based on the change in EEG time and frequency characteristics...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28431118/combining-human-epigenetics-and-sleep-studies-in-c-elegans-a-cross-species-approach-for-finding-conserved-genes-regulating-sleep
#9
Huiyan Huang, Yong Zhu, Melissa N Eliot, Valerie S Knopik, John E McGeary, Mary A Carskadon, Anne C Hart
Study Objectives: We aimed to test a combined approach to identify conserved genes regulating sleep and to explore the association between DNA methylation and sleep length. Methods: We identified candidate genes associated with shorter versus longer sleep duration in college students based on DNA methylation using Illumina Infinium HumanMethylation450 BeadChip arrays. Orthologous genes in Caenorhabditiselegans were identified and we examined whether their loss of function affected C...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28429581/nighttime-is-the-worst-time-parental-fear-of-hypoglycemia-in-young-children-with-type-1-diabetes
#10
Michelle A Van Name, Marisa E Hilliard, Claire T Boyle, Kellee M Miller, Daniel J DeSalvo, Barbara J Anderson, Lori M Laffel, Stephanie E Woerner, Linda A DiMeglio, William V Tamborlane
BACKGROUND: Fear of hypoglycemia is common in parents of young children with type 1 diabetes (T1D), but little is known about the specific fears that parents most often experience. Hypoglycemia fear has been associated with poorer glycemic control in older children, though not yet studied in a large cohort of very young children. MATERIALS AND METHODS: Parents of 549 children <7 years (mean 5.2 ± 1.2 years [19% <3 years]) with a mean diabetes duration of 2...
April 21, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28427836/adherence-to-continuous-positive-airway-pressure-in-adults-with-an-intellectual-disability
#11
Kim A Luijks, Nele L Vandenbussche, Dirk Pevernagie, Sebastiaan Overeem, Sigrid Pillen
STUDY OBJECTIVES: This retrospective study evaluated the feasibility of continuous positive airway pressure (CPAP) therapy in adults with intellectual disabilities (ID). METHODS: CPAP therapy of 24 obstructive sleep apnea syndrome (OSA) patients with ID were compared to age- and sex-matched adults with normal cognitive functioning. All ID patients received an intensive in-hospital training protocol to stimulate adherence. Good adherence was defined as a use of >70% of the nights and >4 h/night...
March 30, 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28427485/gender-specific-association-of-sleep-duration-with-body-mass-index-waist-circumference-and-body-fat-in-chinese-adults
#12
Liu Xia Yan, Xiao Rong Chen, Bo Chen, Ya Min Bai, Jian Hong Li, Xin Wei Zhang, Zhong Dong, Hao Wang, Sheng Quan Mi, Wen Hua Zhao
OBJECTIVE: To examine the association between habitual sleep duration and obesity among Chinese adults. METHODS: The association of sleep duration and obesity was investigated among 7,094 community-dwelling Chinese adults. Sleep duration was self-reported. In this study, obesity was defined as follows: body mass index (BMI) ⋝ 28 kg/m2, waist circumference (WC) ⋝ 85 cm in men and ⋝ 80 cm in women, and percent body fat (%BF) ⋝ 25 in men and ⋝ 35 in women...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28426128/hippocampal-electrical-stimulation-disrupts-associative-learning-when-targeted-at-dentate-spikes
#13
Miriam S Nokia, Irina Gureviciene, Tomi Waselius, Heikki Tanila, Markku Penttonen
Hippocampal electrophysiological oscillations, namely theta and ripples, have been implicated in encoding and consolidation of new memories, respectively. According to existing literature, hippocampal dentate spikes are prominent, short-duration (<30 ms), large-amplitude (∼2-4 mV) fluctuations in hilar local-field potentials that take place during awake immobility and sleep. Interestingly, previous studies indicate that during dentate spikes dentate gyrus granule cells increase their firing while firing of CA1 pyramidal cells are suppressed, thus resulting in momentary uncoupling of the two hippocampal subregions...
April 20, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28425823/association-between-sleep-time-and-depression-a-cross-sectional-study-from-countries-in-rural-northeastern-china
#14
Jiang Mohan, Guo Xiaofan, Sun Yingxian
Objective To investigate the current situation of sleep status and examine its association with depression among counties in rural areas of Liaoning Province, China. Methods This cross-sectional study was conducted from January 2012 to August 2013 in Northeast China. A total of 11,276 subjects aged ≥35 years were surveyed and completed the Patient Health Questionnaire-9; each participant answered questions about their sleep duration. Results For individuals with a sleep time of ≤6, 6-7, 7-8, 8-9, and ≥9 h, the respective risk of depression was 10...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28425739/sleep-duration-partially-accounts-for-race-differences-in-diurnal-cortisol-dynamics
#15
Laurel M Peterson, Karissa G Miller, Patricia M Wong, Barbara P Anderson, Thomas W Kamarck, Karen A Matthews, Clemens Kirschbaum, Stephen B Manuck
OBJECTIVE: Emerging research demonstrates race differences in diurnal cortisol slope, an indicator of hypothalamic-pituitary-adrenocortical (HPA)-axis functioning associated with morbidity and mortality, with African Americans showing flatter diurnal slopes than their White counterparts. Sleep characteristics are associated with both race and with HPA-axis functioning. The present report examines whether sleep duration may account for race differences in cortisol dynamics. METHOD: Participants were 424 employed African American and White adults (mean age = 42...
May 2017: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/28425627/relationship-between-parent-knowledge-of-child-sleep-and-child-sleep-practices-and-problems-a-pilot-study-in-a-children-s-hospital-cohort
#16
Philippa S McDowall, Dawn E Elder, Angela J Campbell
AIM: To describe parent reports of sleep practices, and examine associations with parent knowledge of child sleep, and whether children's sleep practices differ between parents who underestimated, overestimated or accurately estimated children's sleep needs. METHODS: Parents of children aged 2-12 years (n = 115) attending hospital inpatient or day wards were approached and asked to report child sleep routines, sleep problems, parent education, household income and parent knowledge of child sleep via questionnaire...
April 20, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28425191/thank-god-it-s-friday-sleep-improved
#17
Helena Petersen, Göran Kecklund, Paolo D'Onofrio, John Axelsson, Torbjörn Åkerstedt
The weekend is usually seen as a window of recovery. Thus, sleep before a day off may be less impaired than that before a workday. However, very few polysomnographical studies have investigated this hypothesis. Therefore, the aim of the present study was to compare sleep before a workday with that before a weekend. Seventeen teachers participated. Sleep was recorded with polysomnography on one weekday night during the workweek, and on a workday (Friday) followed by a day off. Sleep diaries and actigraphs were also used...
April 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28423054/sleep-duration-and-quality-in-relation-to-chronic-kidney-disease-and-glomerular-hyperfiltration-in-healthy-men-and-women
#18
Chan-Won Kim, Yoosoo Chang, Eunju Sung, Kyung Eun Yun, Hyun-Suk Jung, Byung-Joon Ko, Min-Jung Kwon, Young Youl Hyun, Kyu-Beck Lee, Hyang Kim, Hocheol Shin, Seungho Ryu
BACKGROUND: It is unclear whether sleep duration and quality are associated with chronic kidney disease (CKD) and glomerular hyperfiltration. The aim of this study was to examine the association of sleep duration and quality with CKD and glomerular hyperfiltration in young and middle-aged adults. METHODS: We conducted a cross-sectional study of men and women who underwent a health checkup examination, including assessment of sleep duration and quality (n = 241,607)...
2017: PloS One
https://www.readbyqxmd.com/read/28422896/predictors-of-sleep-outcomes-following-mild-traumatic-brain-injury-in-preschoolers-subjective-and-objective-assessment-of-outcome
#19
Catherine Landry-Roy, Annie Bernier, Jocelyn Gravel, Miriam H Beauchamp
OBJECTIVES: To investigate sleep and its predictors in preschoolers with mild traumatic brain injury (mTBI). PARTICIPANTS AND PROCEDURE: The sample included 225 children, aged 18 to 60 months, divided into 3 groups: children with accidental mTBI (n = 85), children with orthopedic injury (n = 58), and typically developing children (n = 82). Retrospective reports of preinjury sleep and family functioning were obtained as part of a baseline assessment at the time of recruitment...
April 18, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28422546/competition-sleep-is-not-compromised-compared-to-habitual-in-elite-australian-footballers
#20
Benita J Lalor, Shona L Halson, Jacquie Tran, Justin G Kemp, Stuart J Cormack
PURPOSE: To assess the impact of match start time and days relative to match compared to the habitual sleep characteristics of elite Australian Football (AF) players. METHODS: 45 elite male AF players were assessed during the pre-season (habitual) and across four home matches during the season. Players wore an activity monitor the night before (-1), night of (0), one night after (+1), and two nights (+2) after each match and completed a self-reported rating of sleep quality...
April 19, 2017: International Journal of Sports Physiology and Performance
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