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Sleep physiology

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https://www.readbyqxmd.com/read/28346681/obstructive-sleep-apnea-and-postoperative-complications-among-patients-undergoing-gynecologic-oncology-surgery
#1
Olumuyiwa A Bamgbade, Rong R Khaw, Raisah S Sawati, Cathrine M Holland
OBJECTIVE: To investigate the prevalence of obstructive sleep apnea (OSA), physiological or risk factors associated with OSA, and OSA-associated postoperative complications among patients undergoing gynecologic oncology surgery. METHODS: A prospective observational study was done of gynecologic oncology patients undergoing abdominal surgery at a center in the UK between August 2009 and January 2013. All patients underwent perioperative sleep oximetry for the diagnosis of OSA...
March 27, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28344067/upregulation-of-orexin-hypocretin-expression-in-aged-rats-effects-on-feeding-latency-and-neurotransmission-in-the-insular-cortex
#2
Janel M Hagar, Victoria A Macht, Steven P Wilson, James R Fadel
Aging is associated with changes in numerous homeostatic functions, such as food intake, that are thought to be mediated by the hypothalamus. Orexin/hypocretin neurons of the hypothalamus regulate several physiological functions, including feeding, sleep and wakefulness. Evidence from both clinical and animal studies supports the notion that aging is associated with loss or dysregulation of the orexin system. Here, we used virus-mediated gene transfer to manipulate expression of orexin peptides in young and aged rats and examined behavioral and neurochemical correlates of food intake in these animals...
March 23, 2017: Neuroscience
https://www.readbyqxmd.com/read/28343323/post-traumatic-sleep-wake-disorders
#3
REVIEW
Tatyana Mollayeva, Andrea D'Souza, Shirin Mollayeva, Angela Colantonio
All living organisms that face a traumatic life event are susceptible to sleep-wake disturbances. Stress, which can result in trauma, evokes a high level of physiological arousal associated with sympathetic nervous system activation, during both sleep and wakefulness. Heredity, sex hormones, early losses, developmental factors and intra- and interpersonal conflicts, contribute to the level of baseline physiological arousal, producing either subclinical, clinical or complex clinical traits, acutely and at any time after exposure to a traumatic event...
April 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28342990/telephone-adapted-mindfulness-based-stress-reduction-tmbsr-for-patients-awaiting-kidney-transplantation
#4
Cynthia R Gross, Maryanne Reilly-Spong, Taehwan Park, Ruizhi Zhao, Olga V Gurvich, Hassan N Ibrahim
BACKGROUND: Patients with progressive kidney disease experience increasing physiologic and psychosocial stressors and declining health-related quality of life (HRQOL). METHODS: We conducted a randomized, active-controlled, open-label trial to test whether a Mindfulness-based Stress Reduction (MBSR) program delivered in a novel workshop-teleconference format would reduce symptoms and improve HRQOL in patients awaiting kidney transplantation. Sixty-three transplant candidates were randomized to one of two arms: i) telephone-adapted MBSR (tMBSR, an 8-week program of meditation and yoga); or ii) a telephone-based support group (tSupport)...
March 22, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28338644/clinical-hypnosis-an-effective-mind-body-modality-for-adolescents-with-behavioral-and-physical-complaints
#5
REVIEW
Anju Sawni, Cora Collette Breuner
Mind-body medicine is a system of health practices that includes meditation/relaxation training, guided imagery, hypnosis, biofeedback, yoga, art/music therapy, prayer, t'ai chi, and psychological therapies such as cognitive behavioral therapy. Clinical hypnosis is an important mind-body tool that serves as an adjunct to conventional medical care for the adolescent patient. Clinical hypnosis specifically uses self-directed therapeutic suggestions to cultivate the imagination and facilitate the mind-body connection, leading to positive emotional and physical well-being...
March 24, 2017: Children
https://www.readbyqxmd.com/read/28338621/optimized-4-5-diarylimidazoles-as-potent-selective-inhibitors-of-protein-kinase-ck1%C3%AE-and-their-structural-relation-to-p38%C3%AE-mapk
#6
Jakob Halekotte, Lydia Witt, Chiara Ianes, Marc Krüger, Mike Bührmann, Daniel Rauh, Christian Pichlo, Elena Brunstein, Andreas Luxenburger, Ulrich Baumann, Uwe Knippschild, Joachim Bischof, Christian Peifer
The involvement of protein kinase CK1δ in the pathogenesis of severe disorders such as Alzheimer's disease, amyotrophic lateral sclerosis, familial advanced sleep phase syndrome, and cancer has dramatically increased interest in the development of effective small molecule inhibitors for both therapeutic application and basic research. Unfortunately, the design of CK1 isoform-specific compounds has proved to be highly complicated due to the existence of six evolutionarily conserved human CK1 members that possess similar, different, or even opposite physiological and pathophysiological implications...
March 24, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28337936/females-exposed-to-24%C3%A2-h-of-sleep-deprivation-do-not-experience-greater-physiological-strain-but-do-perceive-heat-illness-symptoms-more-severely-during-exercise-heat-stress
#7
Rebecca Relf, Ashley Willmott, Jessica Mee, Oliver Gibson, Arron Saunders, Mark Hayes, Neil Maxwell
There is limited and inconclusive evidence surrounding the physiological and perceptual responses to heat stress while sleep deprived, especially for females. This study aimed to quantify the effect of 24 h sleep deprivation on physiological strain and perceptual markers of heat-related illness in females. Nine females completed two 30-min heat stress tests (HST) separated by 48 h in 39°C, 41% relative humidity at a metabolic heat production of 10 W · kg(-1). The non-sleep deprived HST was followed by the sleep deprivation (SDHST) trial for all participants during the follicular phase of the menstrual cycle...
March 24, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28337439/a-brief-review-of-non-invasive-monitoring-of-respiratory-condition-for-extubated-patients-with-or-at-risk-for-obstructive-sleep-apnea-after-surgery
#8
REVIEW
Xuezheng Zhang, Mahmoud Attia Mohamed Kassem, Ying Zhou, Muhammad Shabsigh, Quanguang Wang, Xuzhong Xu
Obstructive sleep apnea (OSA) is one of the important risk factors contributing to postoperative airway complications. OSA alters the respiratory physiology and increases the sensitivity of muscle tone of the upper airway after surgery to residual anesthetic medication. In addition, the prevalence of OSA was reported to be much higher among surgical patients than the general population. Therefore, appropriate monitoring to detect early respiratory impairment in postoperative extubated patients with possible OSA is challenging...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28337411/physiological-and-pathological-high-frequency-oscillations-have-distinct-sleep-homeostatic-properties
#9
Nicolás von Ellenrieder, François Dubeau, Jean Gotman, Birgit Frauscher
OBJECTIVE: The stage of sleep is a known modulator of high-frequency oscillations (HFOs). For instance, high amplitude slow waves during NREM sleep and the subtypes of REM sleep were shown to contribute to a better separation between physiological and pathological HFOs. This study investigated rates and spatial spread of the different HFO types (physiological and pathological ripples in the 80-250 Hz frequency band, and fast ripples above 250 Hz) depending on time spent in sleep across the different sleep cycles...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28336790/prioritizing-functional-capacity-as-a-principal-end-point-for-therapies-oriented-to-older-adults-with-cardiovascular-disease-a-scientific-statement-for-healthcare-professionals-from-the-american-heart-association
#10
REVIEW
Daniel E Forman, Ross Arena, Rebecca Boxer, Mary A Dolansky, Janice J Eng, Jerome L Fleg, Mark Haykowsky, Arshad Jahangir, Leonard A Kaminsky, Dalane W Kitzman, Eldrin F Lewis, Jonathan Myers, Gordon R Reeves, Win-Kuang Shen
Adults are living longer, and cardiovascular disease is endemic in the growing population of older adults who are surviving into old age. Functional capacity is a key metric in this population, both for the perspective it provides on aggregate health and as a vital goal of care. Whereas cardiorespiratory function has long been applied by cardiologists as a measure of function that depended primarily on cardiac physiology, multiple other factors also contribute, usually with increasing bearing as age advances...
March 23, 2017: Circulation
https://www.readbyqxmd.com/read/28330481/diverse-characteristics-of-the-urinary-excretion-of-amino-acids-in-humans-and-the-use-of-amino-acid-supplementation-to-reduce-fatigue-and-sub-health-in-adults
#11
R H Dunstan, D L Sparkes, M M Macdonald, X Janse De Jonge, B J Dascombe, J Gottfries, C-G Gottfries, T K Roberts
BACKGROUND: The excretion of amino acids in urine represents an important avenue for the loss of key nutrients. Some amino acids such as glycine and histidine are lost in higher abundance than others. These two amino acids perform important physiological functions and are required for the synthesis of key proteins such as haemoglobin and collagen. METHODS: Stage 1 of this study involved healthy subjects (n = 151) who provided first of the morning urine samples and completed symptom questionnaires...
March 23, 2017: Nutrition Journal
https://www.readbyqxmd.com/read/28330459/a-prospective-observational-study-to-evaluate-the-effect-of-social-and-personality-factors-on-continuous-positive-airway-pressure-cpap-compliance-in-obstructive-sleep-apnoea-syndrome
#12
Atul Gulati, Masood Ali, Mike Davies, Tim Quinnell, Ian Smith
BACKGROUND: Compliance with CPAP treatment for OSAS is not reliably predicted by the severity of symptoms or physiological variables. We examined a range of factors which could be measured before CPAP initiation to look for predictors of compliance. METHODS: This was a prospective cohort-study of CPAP treatment for OSAS, recording; socio-economic status, education, type D personality and clinician's prediction of compliance. RESULTS: We recruited 265 subjects, of whom 221 were still using CPAP at 6 months; median age 53 years, M: F, 3...
March 22, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28324989/non-contact-real-time-estimation-of-intrapulmonary-pressure-and-tidal-volume-for-chronic-heart-failure-patients
#13
Vinh Phuc Tran, Adel Ali Al-Jumaily
Long-term continuous patient monitoring is required in many health systems for monitoring and analytical diagnosing purposes. It has been recognized that these types of monitoring systems have shortcomings related to patient comfort and/or functionality. Non-contact monitoring systems have been developed to address some of these shortcomings. One of such systems is non-contact physiological vital signs assessments for Chronic Heart Failure (CHF) patients. This paper presents a novel pulmonary ventilation model that defines the relationship between the intrapulmonary pressure and the chest displacement...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324298/circadian-disruption-associated-with-alzheimer-s-disease
#14
REVIEW
Yumna Saeed, Sabra M Abbott
Alzheimer's disease (AD) is increasing in prevalence and has a significant impact on caregivers and the healthcare system. One of the many physiologic process affected by AD is the circadian system, with disruption reflected in abnormalities of the sleep-wake cycle. This interaction is bidirectional, with circadian and sleep disruption influencing disease progression. Understanding the bidirectional relationship between AD and circadian disruption may allow for earlier recognition of the potential to develop dementia as well as improved targeted approaches for therapy...
April 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28324186/association-of-evening-smartphone-use-with-cardiac-autonomic-nervous-activity-after-awakening-in-adolescents-living-in-high-school-dormitories
#15
Yoko Nose, Rina Fujinaga, Maki Suzuki, Ikuyo Hayashi, Toshio Moritani, Kazuhiko Kotani, Narumi Nagai
PURPOSE: Smartphones are prevalently used among adolescents; however, nighttime exposure to blue-enriched light, through electric devices, is known to induce delays of the circadian rhythm phases and poor morning somatic conditions. We therefore investigated whether evening smartphone use may affect sleep-wake cycle and cardiac autonomic nervous system (ANS) activity after awaking in dormitory students. METHODS: The participants were high school students, living under dormitory rules regarding the curfew, study, meals, lights-out, and wake-up times...
March 21, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28322083/diurnal-variation-of-the-melanin-concentrating-hormone-level-in-the-hypothalamus
#16
Balázs Gerics, Ferenc Szalay, Péter Sótonyi, Veronika Jancsik
Melanin-concentrating hormone (MCH), the neuropeptide produced mainly in the hypothalamus, plays an operative role in regulating food intake and the sleep/wake cycle. Considering that these physiological functions pursue diurnal variations, we checked whether the total hypothalamic MCH level depends on the time of the day. The aggregated MCH peptide content of the whole MCH neuron population was significantly higher at the end of the sleeping period (lights on), than at the end of the active period (lights off)...
March 2017: Acta Biologica Hungarica
https://www.readbyqxmd.com/read/28320073/a-model-linking-video-gaming-sleep-quality-sweet-drinks-consumption-and-obesity-among-children-and-youth
#17
O Turel, A Romashkin, K M Morrison
There is a growing need to curb paediatric obesity. The aim of this study is to untangle associations between video-game-use attributes and obesity as a first step towards identifying and examining possible interventions. Cross-sectional time-lagged cohort study was employed using parent-child surveys (t1) and objective physical activity and physiological measures (t2) from 125 children/adolescents (mean age = 13.06, 9-17-year-olds) who play video games, recruited from two clinics at a Canadian academic children's hospital...
March 20, 2017: Clinical Obesity
https://www.readbyqxmd.com/read/28319187/the-impact-of-high-grade-glial-neoplasms-on-human-cortical-electrophysiology
#18
S Kathleen Bandt, Jarod L Roland, Mrinal Pahwa, Carl D Hacker, David T Bundy, Jonathan D Breshears, Mohit Sharma, Joshua S Shimony, Eric C Leuthardt
OBJECTIVE: The brain's functional architecture of interconnected network-related oscillatory patterns in discrete cortical regions has been well established with functional magnetic resonance imaging (fMRI) studies or direct cortical electrophysiology from electrodes placed on the surface of the brain, or electrocorticography (ECoG). These resting state networks exhibit a robust functional architecture that persists through all stages of sleep and under anesthesia. While the stability of these networks provides a fundamental understanding of the organization of the brain, understanding how these regions can be perturbed is also critical in defining the brain's ability to adapt while learning and recovering from injury...
2017: PloS One
https://www.readbyqxmd.com/read/28318293/yawning-and-social-styles-different-functions-in-tolerant-and-despotic-macaques-macaca-tonkeana-and-macaca-fuscata
#19
Alessandra Zannella, Roscoe Stanyon, Elisabetta Palagi
Yawning is a multifunctional behavior with a role in social communication. In Old World monkeys, the "tension yawn" is often used as a threat, allowing individuals to completely expose their canines. To explore the role of this phenomenon, we selected 2 closely related species-Japanese macaques (Macaca fuscata) and Tonkean macaques (M. tonkeana)-which differ primarily in terms of their tolerance levels. Japanese macaques are classified as despotic; Tonkean macaques are classified as tolerant. Both species live in multimale-multifemale societies, show a high level of sexual dimorphism, and have comparable yawning repertoires that include displaying a covered teeth yawn and an uncovered gums yawn...
March 20, 2017: Journal of Comparative Psychology
https://www.readbyqxmd.com/read/28318060/integrating-postural-and-vestibular-dimensions-to-depict-impairment-in-moderate-to-severe-obstructive-sleep-apnea-syndrome-patients
#20
Alessandro Micarelli, Claudio Liguori, Andrea Viziano, Francesca Izzi, Fabio Placidi, Marco Alessandrini
Vestibular dysfunction was linked to moderate-to-severe obstructive sleep apnea syndrome (OSAS) patients in literature. However, due to a lack of knowledge among valid and recent implementations conceived to study postural control on static posturography (SP) and vestibulo-ocular reflex (VOR) gain under physiological conditions (video Head Impulse Test; vHIT), the aim of this work was to integrate (i) VOR changes via vHIT implementation, (ii) postural arrangement by studying both classical parameters and frequency spectra (PS) and (iii) correlation between these findings, polygraphic (PG) and subjective scores along Dizziness Handicap Inventory (DHI) and Epworth Sleepiness Scale (ESS)...
March 20, 2017: Journal of Sleep Research
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