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https://www.readbyqxmd.com/read/29782533/shared-responsibility-for-managing-fatigue-hearing-the-pilots
#1
Jennifer L Zaslona, Karyn M O'Keeffe, T Leigh Signal, Philippa H Gander
In commercial aviation, fatigue is defined as a physiological state of reduced mental or physical performance capability resulting from sleep loss, extended wakefulness, circadian phase, and/or workload. The International Civil Aviation Organisation mandates that responsibility for fatigue risk management is shared between airline management, pilots, and support staff. However, to date, the majority of research relating to fatigue mitigations in long range operations has focused on the mitigations required or recommended by regulators and operators...
2018: PloS One
https://www.readbyqxmd.com/read/29782435/biobehavioral-responses-of-preterm-infants-to-conventional-and-swaddled-tub-baths-a-randomized-crossover-trial
#2
Patrícia de Freitas, Mariana Bueno, Diane Holditch-Davis, Hudson Pires Santos, Amélia Fumiko Kimura
Bathing is a routine care procedure that exposes preterm infants to prolonged handling, which could cause stress and potentially disrupt infants' biobehavioral responses. The aim of this double-blind randomized crossover trial was to compare the preterm infant's body temperature, heart rate (HR), peripheral capillary oxygen saturation (SpO2), salivary cortisol levels, and sleep-wake states during and after swaddled and conventional tub baths. Forty-three infants born at 32 to 36 weeks postmenstrual age, weighing 2225 g or less, were enrolled in the study...
May 18, 2018: Journal of Perinatal & Neonatal Nursing
https://www.readbyqxmd.com/read/29780880/circadian-and-brain-state-modulation-of-network-hyperexcitability-in-alzheimer-s-disease
#3
Rosalind Brown, Alice D Lam, Alfredo Gonzalez-Sulser, Andrew Ying, Mary Jones, Robert Chang-Chih Chou, Makis Tzioras, Crispin Y Jordan, Izabela Jedrasiak-Cape, Anne-Laure Hemonnot, Maurice Abou Jaoude, Andrew J Cole, Sydney S Cash, Takashi Saito, Takaomi Saido, Richard R Ribchester, Kevan Hashemi, Iris Oren
Network hyperexcitability is a feature of Alzheimer' disease (AD) as well as numerous transgenic mouse models of AD. While hyperexcitability in AD patients and AD animal models share certain features, the mechanistic overlap remains to be established. We aimed to identify features of network hyperexcitability in AD models that can be related to epileptiform activity signatures in AD patients. We studied network hyperexcitability in mice expressing amyloid precursor protein (APP) with mutations that cause familial AD, and compared a transgenic model that overexpresses human APP (hAPP) (J20), to a knock-in model expressing APP at physiological levels (APPNL/F )...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29779599/traumatic-spinal-cord-injury-pulmonary-physiologic-principles-and-management
#4
REVIEW
Gregory J Schilero, William A Bauman, Miroslav Radulovic
In the United States, approximately 17,500 cases of traumatic spinal cord injury (SCI) occur each year, with an estimated 245,000 to 345,000 individuals living with chronic SCI. Acute management of respiratory dysfunction has resulted in improvement in early survival, but life expectancy remains less than that of the general population, and pulmonary complications are a leading cause of mortality. The global changes in pulmonary function, underlying pathophysiology, and the management options to improve respiratory muscle weakness and pulmonary clearance in persons with SCI are discussed...
June 2018: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/29775401/electroencephalographic-signals-during-anesthesia-recorded-from-surface-and-depth-electrodes
#5
Ville Jäntti, Tuomo Ylinen, Narayan Puthanmadam Subramaniyam, Kotoe Kamata, Arvi Yli-Hankala, Pasi Kauppinen, Eila Sonkajärvi
Purpose - Anesthesiologists have increasingly started to use EEG based indexes to estimate the level and type of unconsciousness. However, the physiology and biophysics are poorly understood in anesthesiological literature. Methods - EEG was recorded from electrodes on the surface of head, including scalp, as well as DBS (deep brain stimulation) electrodes implanted deep in the brain. Mathematical modeling with a realistic head model was performed to create illustrative images of the sensitivity of electrode montages...
May 18, 2018: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29772442/cognitive-and-hippocampus-biochemical-changes-following-sleep-deprivation-in-the-adult-male-rat
#6
Ebrahim Nabaee, Mahnaz Kesmati, Ali Shahriari, Lotfollah Khajehpour, Mozhgan Torabi
Sleep deprivation (SD) influences physiological processes such as cognitive function. The balance of oxidant and antioxidant markers, neurotrophic factors and magnesium are affected by sleep deprivation but there is no difference between pre and post training sleep deprivation. This study was designed to investigate memory retrieval and biochemical factors such as oxidant and antioxidant enzyme, brain-derived neurotrophic factor (BDNF) and magnesium levels in the hippocampus following pre and post-training sleep deprivation...
May 14, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29772309/attention-deficit-hyperactivity-disorder-and-obesity-a-review-and-model-of-current-hypotheses-explaining-their-comorbidity
#7
REVIEW
Tomasz Hanć, Samuele Cortese
Available meta-analyses point to a significant association between attention-deficit/hyperactivity disorder (ADHD) and obesity. The possible mechanisms underlying this relationship are unclear. Here, we overview the studies aimed at identifying the factors contributing to the comorbidity between ADHD and obesity, including genetic factors, fetal programming, executive dysfunctions, psychosocial stress, factors directly related to energy balance, and sleep patterns alterations. The bulk of current research has focused on reduced physical activity and abnormal eating patterns as possible causes of weight gain in individuals with ADHD...
May 14, 2018: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29767680/propensity-for-adverse-pregnancy-outcomes-in-african-american-women-may-be-explained-by-low-energy-expenditure-in-early-pregnancy
#8
Jasper Most, L Anne Gilmore, Abby D Altazan, Marshall St Amant, Robbie A Beyl, Eric Ravussin, Leanne M Redman
Background: African-American (AA) women have poorer pregnancy outcomes and studies in nonpregnant women suggest a different etiology of weight gain in AA compared with white women. We hypothesized that physiologic factors such as low energy expenditure and physical activity would be present in AA compared with white women in pregnancy. Objective: We aimed to identify physiologic risk factors for disordered energy balance in AA and white women early in pregnancy...
May 14, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29767630/characterization-of-cardiorespiratory-phase-synchronization-and-directionality-in-late-premature-and-full-term-infants
#9
Maristella Lucchini, Nicolo Pini, William P Fifer, Nina Burtchen, Maria G Signorini
OBJECTIVE: Though the mutual influence of cardiovascular and respiratory rhythms in healthy newborns has been documented, its full characterization is still pending. In general, activity of many physiological subsystems has a well expressed rhythmic character, and often an interdependency between physiological rhythms emerges early in development. Traditional methods of data analysis only address the quantification of the strength of subsystem interactions. In this work, we will investigate system interrelationships in terms of possible presence of causal or directional interplays...
May 16, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29766217/involvement-of-extrasynaptic-glutamate-in-physiological-and-pathophysiological-changes-of-neuronal-excitability
#10
REVIEW
Balázs Pál
Glutamate is the most abundant neurotransmitter of the central nervous system, as the majority of neurons use glutamate as neurotransmitter. It is also well known that this neurotransmitter is not restricted to synaptic clefts, but found in the extrasynaptic regions as ambient glutamate. Extrasynaptic glutamate originates from spillover of synaptic release, as well as from astrocytes and microglia. Its concentration is magnitudes lower than in the synaptic cleft, but receptors responding to it have higher affinity for it...
May 15, 2018: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29758571/effects-of-a-20-min-nap-post-normal-and-jet-lag-conditions-on-p300-components-in-athletes
#11
Elisabeth Petit, Hubert Bourdin, Grégory Tio, Omer Yenil, Emmanuel Haffen, Fabienne Mougin
Post-lunch sleepiness belongs to biological rhythms. Athletes take a nap to counteract afternoon circadian nadir, in prevision of disturbed sleep. This study examined the effects of brief post-lunch nap on vigilance in young and healthy athletes. The P300 components, physiological and cognitive performances were assessed either after nap or rest, following a night of normal sleep (NSC) or simulated jet lag condition (5-h advance-JLC). P300 wave is the positive deflection at about 300 ms in response to a rare stimulus, representing higher information processing...
May 14, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29756614/transoral-glossoepiglottopexy-in-the-treatment-of-adult-obstructive-sleep-apnoea-a-surgical-approach
#12
V Roustan, M Barbieri, F Incandela, F Missale, H Camera, F Braido, R Mora, G Peretti
The treatment of obstructive sleep apnoea syndrome (OSAS) is still a matter of debate; among the different therapeutic alternatives, both surgical and conservative, treatment with continuous positive airway pressure (CPAP) is considered the "gold standard". The recent scientific literature reports that even if CPAP represents an effective solution for sleep apnoeas, 12% of patients do not benefit from its use. In most cases, primary collapse of the epiglottis is responsible for failure. We developed a surgical technique that provides a stable support to the epiglottis without influencing its function during swallowing while preserving laryngeal anatomy and physiology...
February 2018: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29752975/changes-in-mood-fatigue-sleep-cognitive-performance-and-stress-hormones-among-instructors-conducting-stressful-military-captivity-survival-training
#13
Oshin Vartanian, Brenda Fraser, Doug Saunders, Cindy Suurd Ralph, Harris R Lieberman, Charles A Morgan, Bob Cheung
Numerous studies have examined the effects of captivity survival training on psychological and physiological function in trainees. In the present study we shifted the focus to instructors, and measured the effects that the delivery of training exerts on their levels of stress and performance. Because instructors are called upon to perform difficult duties (e.g., mock interrogations) under extreme conditions, we hypothesized that significant increases in psychological and physiological indices of stress would occur due to training...
May 9, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29745793/extreme-pregnancy-maternal-physical-activity-at-everest-base-camp
#14
Margie H Davenport, Craig D Steinback, Kennedy J Borle, Brittany A Matenchuk, Emily R Vanden Berg, Emily M de Freitas, Andrea M Linares, Ken D O'Halloran, Mingma T Sherpa, Trevor A Day
High altitude natives employ numerous physiological strategies to survive and reproduce. However, the concomitant influence of altitude and physical activity during pregnancy has not been studied above 3,700m. We report a case of physical activity, sleep behavior and physiological measurements on a 28-year-old third-trimester pregnant native highlander (Sherpa) during ascent from 3440m to Everest base camp (~5,300m) over eight days in the Nepal Himalaya, and again ~10-months postpartum during a similar ascent profile...
May 10, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29735673/simulated-night-shift-work-induces-circadian-misalignment-of-the-human-peripheral-blood-mononuclear-cell-transcriptome
#15
Laura Kervezee, Marc Cuesta, Nicolas Cermakian, Diane B Boivin
Misalignment of the endogenous circadian timing system leads to disruption of physiological rhythms and may contribute to the development of the deleterious health effects associated with night shift work. However, the molecular underpinnings remain to be elucidated. Here, we investigated the effect of a 4-day simulated night shift work protocol on the circadian regulation of the human transcriptome. Repeated blood samples were collected over two 24-hour measurement periods from eight healthy subjects under highly controlled laboratory conditions before and 4 days after a 10-hour delay of their habitual sleep period...
May 7, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29734986/prevalence-associated-clinical-features-and-impact-on-continuous-positive-airway-pressure-use-of-a-low-respiratory-arousal-threshold-among-male-united-states-veterans-with-obstructive-sleep-apnea
#16
Andrey Zinchuk, Bradley A Edwards, Sangchoon Jeon, Brian B Koo, John Concato, Scott Sands, Andrew Wellman, Henry K Yaggi
STUDY OBJECTIVES: Determine the prevalence of, and clinical features associated with, a low respiratory arousal threshold (ArTH) among patients with obstructive sleep apnea (OSA), and to assess whether a low ArTH is associated with reduced long-term CPAP use. METHODS: Cross-sectional and longitudinal analyses were performed in an observational study conducted among 940 male veterans with OSA. Data for clinical characteristics, polysomnography characteristics, and long-term (5 ± 2 years) CPAP use were obtained from clinical records...
April 30, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29733807/fractal-regulation-and-incident-alzheimer-s-disease-in-elderly-individuals
#17
Peng Li, Lei Yu, Andrew S P Lim, Aron S Buchman, Frank A J L Scheer, Steven A Shea, Julie A Schneider, David A Bennett, Kun Hu
INTRODUCTION: Healthy physiological systems exhibit fractal regulation (FR), generating similar fluctuation patterns in physiological outputs across different time scales. FR in motor activity is degraded in dementia, and the degradation correlates to cognitive decline. We tested whether degraded FR predicts Alzheimer's disease dementia. METHODS: FR in motor activity was assessed in 1097 nondemented older adults at baseline. Cognition was assessed annually for up to 11 years...
May 4, 2018: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29731875/circadian-locomotor-output-cycles-kaput-affects-the-proliferation-and-migration-of-breast-cancer-cells-by-regulating-the-expression-of-e-cadherin-via-iq-motif-containing-gtpase-activating-protein-1
#18
Xiaoxue Li, Siyang Wang, Shuhong Yang, Junjie Ying, Hang Yu, Chunlei Yang, Yanyou Liu, Yuhui Wang, Shuting Cheng, Jing Xiao, Huiling Guo, Zhou Jiang, Zhengrong Wang
The circadian rhythm regulates numerous physiological activities, including sleep and wakefulness, behavior, immunity and metabolism. Previous studies have demonstrated that circadian rhythm disorder is associated with the occurrence of tumors. Responsible for regulating a number of functions, the Circadian locomotor output cycles kaput ( Clock ) gene is one of the core regulatory genes of circadian rhythm. The Clock gene has also been implicated in the occurrence and development of tumors in previously studies...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29731671/the-level-of-observed-physical-movement-accompanying-periodic-limb-movements-measured-in-a-clinical-sleep-population
#19
Robert G Hooper
Study objectives: Periodic limb movements (PLMs) are routinely measured during polysomnogram (PSG) testing. During the early years of sleep testing, physical movements were identified and over time, consensus ultimately led to the current definitions of movement disorders including criteria used to measure PLMs on PSG testing. There has been considerable debate about the clinical importance of the PLMs measured during PSG testing. Over the last decade, the author has observed significant variations in the actual visible physical movements observed with a PLM event...
2018: Nature and Science of Sleep
https://www.readbyqxmd.com/read/29729240/reducing-hospital-toxicity-impact-on-patient-outcomes
#20
Richard V Milani, Robert M Bober, Carl J Lavie, Jonathan K Wilt, Alexander R Milani, Christopher J White
BACKGROUND: Circadian rhythms are endogenous 24-hour oscillations in biologic processes that drive nearly all physiologic and behavioral functions. Disruption in circadian rhythms can adversely impact short and long-term health outcomes. Routine hospital care often causes significant disruption in sleep-wake patterns that is further compounded by loss of personal control of health information and health decisions. We wished to evaluate measures directed at improving circadian rhythm and access to daily health information on hospital outcomes...
May 2, 2018: American Journal of Medicine
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