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https://www.readbyqxmd.com/read/28809709/a-new-method-for-automatic-sleep-stage-classification
#1
Junming Zhang, Yan Wu
Traditionally, automatic sleep stage classification is quite a challenging task because of the difficulty in translating open-textured standards to mathematical models and the limitations of handcrafted features. In this paper, a new system for automatic sleep stage classification is presented. Compared with existing sleep stage methods, our method can capture the sleep information hidden inside electroencephalography (EEG) signals and automatically extract features from raw data. To translate open sleep stage standards into machine rules recognized by computers, a new model named fast discriminative complex-valued convolutional neural network (FDCCNN) is proposed to extract features from raw EEG data and classify sleep stages...
August 14, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28673883/microsurgical-performance-after-sleep-interruption-a-neurotouch-simulator-study
#2
Alexander Micko, Karoline Knopp, Engelbert Knosp, Stefan Wolfsberger
OBJECTIVE: In times of the ubiquitous debate about doctors' working hour restrictions, it is still questionable if the physician's performance is impaired by high workload and long shifts. In this study we evaluated the impact of sleep interruption on the neurosurgical performance. METHODS: Ten medical students and ten neurosurgical residents were tested on the virtual-reality simulator NeuroTouch by performing the identical microsurgical task, well-rested (baseline test), and after sleep interruption at night (stress test)...
June 30, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28649873/can-you-snooze-your-way-to-an-a-exploring-the-complex-relationship-between-sleep-autonomic-activity-wellbeing-and-performance-in-medical-students
#3
Erin Cvejic, Shiny Huang, Uté Vollmer-Conna
OBJECTIVE: Medical training brings with it multiple stressors, including demanding workloads in highly competitive environments, with well-documented impact on psychiatric morbidity. This study evaluated the impact of sleep-related factors on psychological wellbeing, cognitive task performance and academic standing in medical students. METHODS: A total of 59 undergraduate medical students took part in this cross-sectional study over two consecutive days. Participants responded to questionnaires about their physical and psychological health, sleep, functioning and academic performance at the initial visit...
June 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/28327274/physician-extenders-on-surgical-services-a%C3%A2-systematic-review
#4
REVIEW
Jagdeep Johal, Andrew Dodd
BACKGROUND: With the introduction of resident duty hour restrictions and the resulting in-house trainee shortages, a long-term solution to ensure safe and efficient patient care is needed. One solution is the integration of nurse practitioners (NPs) and physician assistants (PAs) in a variety of health care settings. We sought to examine the use of NPs and PAs on surgical/trauma services and their effect on patient outcomes and resident workload. METHODS: We performed a systematic review of EMBASE, Medline, CINAHL, and the Cochrane Central Register of Controlled Trials...
June 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
https://www.readbyqxmd.com/read/27893255/the-relationship-between-sleep-and-work-a-meta-analysis
#5
Brett Litwiller, Lori Anderson Snyder, William D Taylor, Logan M Steele
Sleep has tremendous importance to organizations because of its relationship with employee performance, safety, health, and attitudes. Moreover, sleep is a malleable behavior that may be improved by individual and organizational changes. Despite the consequential and modifiable nature of sleep, little consensus exists regarding its conceptualization, and how the choice of conceptualization may impact relationships with organizational antecedents and outcomes. To offer a stronger foundation for future theory and research about employee sleep, this study calculated meta-analytic correlations of sleep quality and sleep quantity from 152 primary studies of sleep among workers in organizations...
April 2017: Journal of Applied Psychology
https://www.readbyqxmd.com/read/27732604/chronic-low-quality-sleep-impairs-postural-control-in-healthy-adults
#6
Fabianne Furtado, Bruno da Silva B Gonçalves, Isabela Lopes Laguardia Abranches, Ana Flávia Abrantes, Arturo Forner-Cordero
The lack of sleep, both in quality and quantity, is an increasing problem in modern society, often related to workload and stress. A number of studies have addressed the effects of acute (total) sleep deprivation on postural control. However, up to date, the effects of chronic sleep deficits, either in quantity or quality, have not been analyzed. Thirty healthy adults participated in the study that consisted of registering activity with a wrist actigraph for more than a week before performing a series of postural control tests...
2016: PloS One
https://www.readbyqxmd.com/read/27329516/nighttime-feeding-likely-alters-morning-metabolism-but-not-exercise-performance-in-female-athletes
#7
RANDOMIZED CONTROLLED TRIAL
Michael J Ormsbee, Katherine A Gorman, Elizabeth A Miller, Daniel A Baur, Lisa A Eckel, Robert J Contreras, Lynn B Panton, Maria T Spicer
The timing of morning endurance competition may limit proper pre-race fueling and resulting performance. A nighttime, pre-sleep nutritional strategy could be an alternative method to target the metabolic and hydrating needs of the early morning athlete without compromising sleep or gastrointestinal comfort during exercise. Therefore, the purpose of this investigation was to examine the acute effects of pre-sleep chocolate milk (CM) ingestion on next-morning running performance, metabolism, and hydration status...
July 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27246936/night-shift-fatigue-among-anaesthesia-trainees-at-a-major-metropolitan-teaching-hospital
#8
B M Lancman
Night shifts expose anaesthesia trainees to the risk of fatigue and, potentially, fatigue-related performance impairment. This study examined the workload, fatigue and coping strategies of anaesthesia trainees during night shifts. A blinded survey-based study was undertaken at a major single centre metropolitan teaching hospital in Australia. All ten anaesthesia trainees who worked night shifts participated. The survey collected data on duration of night shifts, workload, and sleep patterns. Fatigue was assessed using the Karolinska Sleepiness Scale (KSS)...
May 2016: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/27226703/impact-of-mindfulness-training-on-physiological-measures-of-stress-and-objective-measures-of-attention-control-in-a-military-helicopter-unit
#9
Anders Meland, Kazuma Ishimatsu, Anne Marte Pensgaard, Anthony Wagstaff, Vivianne Fonne, Anne Helene Garde, Anette Harris
Objective: This study sought to determine if mindfulness training (MT) has a measurable impact on stress and attentional control as measured by objective physiological and psychological means. Background: Periods of persistent, intensive work demands are known to compromise recovery and attentional capacity. The effects of 4-month MT on salivary cortisol and performance on 2 computer-based cognitive tasks were tested on a military helicopter unit exposed to a prolonged period of high workload. Methods: MT participants were compared to a wait list control group on levels of saliva cortisol and performance on a go-no go test and a test of stimulus-driven attentional capture...
October 2, 2015: International Journal of Aviation Psychology
https://www.readbyqxmd.com/read/26986022/driver-state-examination-treading-new-paths
#10
Edmund Wascher, Stephan Getzmann, Melanie Karthaus
A large proportion of crashes in road driving can be attributed to driver fatigue. Several types of fatigue are discussed, comprising sleep-related fatigue, active task-related fatigue (as a consequence of workload in demanding driving situations) as well as passive task-related fatigue (as related to monotonous driving situations). The present study investigated actual states of fatigue in a monotonous driving situation, using EEG measures and a long-lasting driving simulation experiment, in which drivers had to keep the vehicle on track by compensating crosswind of different strength...
June 2016: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/26819244/medical-decisions-of-pediatric-residents-turn-riskier-after-a-24-hour-call-with-no-sleep
#11
Adi Aran, Netanel Wasserteil, Itai Gross, Joseph Mendlovic, Yehuda Pollak
BACKGROUND: Despite a gradual reduction in the workload during residency, 24-hour calls are still an integral part of most training programs. While sleep deprivation increases the risk propensity, the impact on medical risk taking has not been studied. OBJECTIVE: This study aimed to assess the clinical decision making and psychomotor performance of pediatric residents following a limited nap time during a 24-hour call. METHODS: A neurocognitive battery (IntegNeuro) and a medical decision questionnaire were completed by 44 pediatric residents at 2 time points: after a 24-hour call and following 3 nights with no calls (sleep ≥5 hours)...
January 2017: Medical Decision Making: An International Journal of the Society for Medical Decision Making
https://www.readbyqxmd.com/read/26356374/noise-exposure-and-cognitive-performance-a-study-on-personnel-on-board-royal-norwegian-navy-vessels
#12
Kaja Irgens-Hansen, Hilde Gundersen, Erlend Sunde, Valborg Baste, Anette Harris, Magne Bråtveit, Bente E Moen
Prior research shows that work on board vessels of the Royal Norwegian Navy (RNoN) is associated with noise exposure levels above recommended standards. Further, noise exposure has been found to impair cognitive performance in environmental, occupational, and experimental settings, although prior research in naval and maritime settings is sparse. The aim of this study was to evaluate cognitive performance after exposure to noise among personnel working on board vessels in the RNoN. Altogether 87 Navy personnel (80 men, 7 women; 31 ± 9 years) from 24 RNoN vessels were included...
September 2015: Noise & Health
https://www.readbyqxmd.com/read/26257477/fatigue-management-in-the-workplace
#13
REVIEW
Khosro Sadeghniiat-Haghighi, Zohreh Yazdi
Workers' fatigue is a significant problem in modern industry, largely because of high demand jobs, long duty periods, disruption of circadian rhythms, and accumulative sleep debt that are common in many industries. Fatigue is the end result of integration of multiple factors such as time awake, time of day, and workload. Then, the full understanding of circadian biologic clock, dynamics of transient and cumulative sleep loss, and recovery is required for effective management of workplace fatigue. It can be more investigated in a new field of sleep medicine called occupational sleep medicine...
January 2015: Industrial Psychiatry Journal
https://www.readbyqxmd.com/read/26091549/perceived-sources-of-stress-among-first-year-nursing-students-in-jordan
#14
Ra'ed M Shudifat, Raya Yousef Al-Husban
The aim of the current study was to determine the most prevalent sources of stress among first-year nursing students at a military college in Jordan. A descriptive cross-sectional study was performed using a convenience sample of 138 students (females between ages 18 and 22). The Student Stress Survey was used to identify stressors and assess their relative importance. The instrument consists of 40 items divided into four categories of potential sources of stress: (a) intrapersonal, (b) interpersonal, (c) academic, and (d) environmental...
June 2015: Journal of Psychosocial Nursing and Mental Health Services
https://www.readbyqxmd.com/read/26084463/central-and-peripheral-hemodynamic-adaptations-during-cardiopulmonary-exercise-test-in-heart-failure-patients-with-exercise-periodic-breathing
#15
Tieh-Cheng Fu, Szu-Ling Chou, Tai-Tzung Chen, Chao-Hung Wang, Hen-Hong Chang, Jong-Shyan Wang
Some heart failure (HF) patients develop ventilatory oscillation which is composed of exercise periodic breathing (EPB) and sleep apnea. The ventilatory oscillation is associated with exercise intolerance. This study employed an integrated monitoring system to elucidate the way of central and peripheral hemodynamic adaption responding to exercise. This study recruited 157 HF patients to perform exercise testing using a bicycle ergometer. A noninvasive bio-reactance device was adopted to measure cardiac hemodynamics, whereas a near-infrared spectroscopy (NIRS) was used to assess perfusion and O2 extraction in the frontal cerebral lobe (FC) and vastus lateralis muscle (VL) during exercise respectively...
2015: International Heart Journal
https://www.readbyqxmd.com/read/25968970/blood-pressure-morning-surge-exercise-blood-pressure-response-and-autonomic-nervous-system
#16
Asli Tanindi, Murat Ugurlu, Hasan Fehmi Tore
OBJECTIVE: We investigated blood pressure (BP) response to exercise with respect to BP morning surge (MS), and the association between MS, exercise treadmill test (ETT) and heart rate variability (HRV) indices. DESIGN: Eighty-four healthy subjects without hypertension were enrolled. Ambulatory BP monitoring and 24-hour Holter recordings were obtained for sleep-trough MS and HRV indices: low-frequency (LF) component, high-frequency (HF) component and LF/HF ratio...
August 2015: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/25658148/recovery-between-work-shifts-among-emergency-medical-services-clinicians
#17
P Daniel Patterson, Daniel J Buysse, Matthew D Weaver, Clifton W Callaway, Donald M Yealy
OBJECTIVE: Shift workers regularly report sleep problems, fatigue, and the need for recuperative rest between shifts (intershift recovery). We sought to characterize intershift recovery among emergency medical services (EMS) workers and the role of worker demographics and work-related factors. METHODS: We combined cross-sectional survey data from two studies of EMS shift workers who completed standardized instruments, including the Occupational Fatigue Exhaustion Recovery (OFER) scale...
July 2015: Prehospital Emergency Care
https://www.readbyqxmd.com/read/25571422/evaluation-of-the-workload-and-drowsiness-during-car-driving-by-using-high-resolution-eeg-activity-and-neurophysiologic-indices
#18
A Maglione, G Borghini, P Aricò, F Borgia, I Graziani, A Colosimo, W Kong, G Vecchiato, F Babiloni
Sleep deprivation and/or a high workload situation can adversely affect driving performance, decreasing a driver's capacity to respond effectively in dangerous situations. In this context, to provide useful feedback and alert signals in real time to the drivers physiological and brain activities have been increasingly investigated in literature. In this study, we analyze the increase of cerebral workload and the insurgence of drowsiness during car driving in a simulated environment by using high resolution electroencephalographic techniques (EEG) as well as neurophysiologic variables such as heart rate (HR) and eye blinks rate (EBR)...
2014: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/25558741/-24-hour-work-the-interaction-of-stress-and-changes-in-the-sleep-wake-cycle-in-the-police-force
#19
REVIEW
Sergio Garbarino
Disruption in police officers. In recent years there has been a widespread growth in services, available regardless of time or day organization (24/7 service) and a diffuse increase in their use, both in work and private lives, generally ignoring the importance of a regular sleep organization. Police officers - often need to work extended shifts and long hours under highly stressful conditions, which results in reduced levels of safety and operational effectiveness. In numerous studies, perceived stress has been found to correlate with both subjective and objective disturbances in sleep...
October 2014: Giornale Italiano di Medicina del Lavoro Ed Ergonomia
https://www.readbyqxmd.com/read/25548798/does-aerobic-exercise-improve-or-impair-cardiorespiratory-fitness-and-health-among-cleaners-a-cluster-randomized-controlled-trial
#20
RANDOMIZED CONTROLLED TRIAL
Mette Korshøj, Mark Lidegaard, Jørgen H Skotte, Peter Krustrup, Niklas Krause, Karen Søgaard, Andreas Holtermann
OBJECTIVE: It is unknown if aerobic exercise overloads or improves the cardiovascular system among workers with high occupational physical activity. This was investigated in a worksite randomized controlled trial (RCT) of aerobic exercise among cleaners. METHODS: We randomized 116 cleaners between 18-65 years. The aerobic exercise group (N=57) performed worksite aerobic exercise (30 minutes twice a week) and the reference group (N=59) received lectures. Cardiorespiratory fitness, blood pressure (BP) and diurnal heart rate (HR) for measuring aerobic workload [% HR reserve (% HRR)] were collected at baseline and after four months...
March 2015: Scandinavian Journal of Work, Environment & Health
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