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Tracking Fatigue

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https://www.readbyqxmd.com/read/27898382/towards-real-time-estimation-of-muscle-fiber-conduction-velocity-using-delay-locked-loop
#1
Lin Xu, Chiara Rabotti, Massimo Mischi
Decrease in muscle-fiber conduction velocity (MFCV) during sustained contraction has been widely accepted as myoelectric manifestation of muscle fatigue. Several methods have been proposed in the literature for MFCV estimation by analysing surface electromyography (EMG), e.g., cross-correlation (CC) function and maximum likelihood (ML). However, for all the available methods, windowing of the EMG signal and computationally demanding calculations are required, limiting the possibility to continuously monitor muscle fatigue in real time...
November 24, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27895218/a-new-approach-to-identify-high-burnout-medical-staffs-by-kernel-k-means-cluster-analysis-in-a-regional-teaching-hospital-in-taiwan
#2
Yii-Ching Lee, Shian-Chang Huang, Chih-Hsuan Huang, Hsin-Hung Wu
This study uses kernel k-means cluster analysis to identify medical staffs with high burnout. The data collected in October to November 2014 are from the emotional exhaustion dimension of the Chinese version of Safety Attitudes Questionnaire in a regional teaching hospital in Taiwan. The number of effective questionnaires including the entire staffs such as physicians, nurses, technicians, pharmacists, medical administrators, and respiratory therapists is 680. The results show that 8 clusters are generated by kernel k-means method...
2016: Inquiry: a Journal of Medical Care Organization, Provision and Financing
https://www.readbyqxmd.com/read/27891670/biomechanical-behavior-of-novel-composite-pmma-cap-bone-cements-in-an-anatomically-accurate-cadaveric-vertebroplasty-model
#3
Shant Aghyarian, Xiaobang Hu, Ram Haddas, Isador H Lieberman, Victor Kosmopoulos, Harry K W Kim, Danieli C Rodrigues
Vertebral compression fractures are caused by many factors including trauma and osteoporosis. Osteoporosis induced fractures are a result of loss in bone mass and quality that weaken the vertebral body. Vertebroplasty and kyphoplasty, involving cement augmentation of fractured vertebrae, show promise in restoring vertebral mechanical properties. Some complications however, are reported due to the performance characteristics of commercially available bone cements. In this study, the biomechanical performance characteristics of two novel composite (PMMA-CaP) bone cements were studied using an anatomically accurate human cadaveric vertebroplasty model...
November 27, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27872598/futsal-match-related-fatigue-affects-running-performance-and-neuromuscular-parameters-but-not-finishing-kick-speed-or-accuracy
#4
Fabio Milioni, Luiz H P Vieira, Ricardo A Barbieri, Alessandro M Zagatto, Nikolai B Nordsborg, Fabio A Barbieri, Júlio W Dos-Santos, Paulo R P Santiago, Marcelo Papoti
Purpose: The aim of the present study was to investigate the influence of futsal match-related fatigue on running performance, neuromuscular variables, and finishing kick speed and accuracy. Methods: Ten professional futsal players participated in the study (age: 22.2 ± 2.5 years) and initially performed an incremental protocol to determine maximum oxygen uptake ([Formula: see text]: 50.6 ± 4.9 mL.kg(-1).min(-1)). Next, simulated games were performed, in four periods of 10 min during which heart rate and blood lactate concentration were monitored...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27855740/orthosomnia-are-some-patients-taking-the-quantified-self-too-far
#5
Kelly Glazer Baron, Sabra Abbott, Nancy Jao, Natalie Manalo, Rebecca Mullen
The use of wearable sleep tracking devices is rapidly expanding and provides an opportunity to engage individuals in monitoring of their sleep patterns. However, there are a growing number of patients who are seeking treatment for self-diagnosed sleep disturbances such as insufficient sleep duration and insomnia due to periods of light or restless sleep observed on their sleep tracker data. The patients' inferred correlation between sleep tracker data and daytime fatigue may become a perfectionistic quest for the ideal sleep in order to optimize daytime function...
November 14, 2016: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/27825568/osteoarticular-manifestations-of-celiac-disease-and-non-celiac-gluten-hypersensitivity
#6
Stéphanie Dos Santos, Frédéric Lioté
Celiac disease is a chronic inflammatory autoimmune enteropathy based disorder that is triggered by the ingestion of gluten in genetically susceptible individuals. The global prevalence of 1% to 2% represents only the tip of the iceberg. The diagnosis is confirmed by positive specific antibody, anti-transglutaminase or anti-endomysium, specific lesions of the small intestine and a response to strict gluten-free diet. The diagnosis is difficult and often delayed because the clinical variability is very large, ranging from digestive clinical presentation "classic" to "atypical" symptoms, often extra-intestinal, that are sometimes attributed to a concomitant disease or a complication...
November 4, 2016: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/27755335/fat%C3%A4-gue-fa%C3%A4-lure-in-extra-art%C3%A4-cular-prox%C3%A4-mal-t%C3%A4-b%C3%A4-a-fractures-lock%C3%A4-ng-%C3%A4-ntramedullary-na%C3%A4-l-vs-double-lock%C3%A4-ng-plates
#7
Utku Kandemir, Safa Herfat, Mary Herzog, Paul Viscogliosi, Murat Pekmezci
OBJECTIVES: The goal of this study is to compare the fatigue strength of a locking intramedullary nail (LN) construct to a double locking plate (DLP) construct in comminuted proximal extra-articular tibia fractures. METHODS: Eight pairs of fresh frozen cadaveric tibias with low bone mineral density (Age: 80 ± 7 (SD) years, T-score: -2.3 ± 1.2) were used. One tibia from each pair was fixed with LN while the contralateral side was fixed with DLP for complex extra-articular multifragmentary, metaphyseal fractures (simulating OTA41-A3...
October 7, 2016: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27744179/non-intrusive-practitioner-pupil-detection-for-unmodified-microscope-oculars
#8
Wolfgang Fuhl, Thiago Santini, Carsten Reichert, Daniel Claus, Alois Herkommer, Hamed Bahmani, Katharina Rifai, Siegfried Wahl, Enkelejda Kasneci
Modern microsurgery is a long and complex task requiring the surgeon to handle multiple microscope controls while performing the surgery. Eye tracking provides an additional means of interaction for the surgeon that could be used to alleviate this situation, diminishing surgeon fatigue and surgery time, thus decreasing risks of infection and human error. In this paper, we introduce a novel algorithm for pupil detection tailored for eye images acquired through an unmodified microscope ocular. The proposed approach, the Hough transform, and six state-of-the-art pupil detection algorithms were evaluated on over 4000 hand-labeled images acquired from a digital operating microscope with a non-intrusive monitoring system for the surgeon eyes integrated...
October 7, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27733079/a-randomised-control-trial-of-walking-to-ameliorate-brain-injury-fatigue-a-nidrr-tbi-model-system-centre-based-study
#9
Stephanie A Kolakowsky-Hayner, Kimberly Bellon, Ketra Toda, Tamara Bushnik, Jerry Wright, Linda Isaac, Jeffrey Englander
Fatigue is one of the most commonly reported sequelae after traumatic brain injury (TBI). This study evaluated the impact of a graduated physical activity programme on fatigue after TBI. Using a prospective randomised single-blind crossover design, 123 individuals with TBI, over the age of 18, were enrolled. Interventions included a home-based walking programme utilising a pedometer to track daily number of steps at increasing increments accompanied by tapered coaching calls over a 12-week period. Nutritional counselling with the same schedule of coaching calls served as the control condition...
October 13, 2016: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/27732325/stress-fractures-concepts-and-therapeutics
#10
Carolina A Moreira, John P Bilezikian
CONTEXT: Stress fractures are repetitive use injuries in which recurrent strains lead to material fatigue and microarchitectural discontinuities. Stress fractures account for up to 20% of athletic injuries, more commonly sustained by women and in those who engage in track-and-field events. The pathogenesis of stress fractures is multifactorial. Although most stress fracture are reported among women who may experience menstrual disturbances, low body mass index, low energy intake and sometimes low bone mass, these individuals do not regularly seek endocrinological attention...
October 12, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27681684/the-impairing-effect-of-mental-fatigue-on-visual-sustained-attention-under-monotonous-multi-object-visual-attention-task-in-long-durations-an-event-related-potential-based-study
#11
Zizheng Guo, Ruiya Chen, Kan Zhang, Yirun Pan, Jianhui Wu
The impairing effects of mental fatigue on visual sustained attention were assessed by event-related potentials (ERPs). Subjects performed a dual visual task, which includes a continuous tracking task (primary task) and a random signal detection task (secondary task), for 63 minutes nonstop in order to elicit ERPs. In this period, the data such as subjective levels of mental fatigue, behavioral performance measures, and electroencephalograms were recorded for each subject. Comparing data from the first interval (0-25 min) to that of the second, the following phenomena were observed: the subjective fatigue ratings increased with time, which indicates that performing the tasks leads to increase in mental fatigue levels; reaction times prolonged and accuracy rates decreased in the second interval, which indicates that subjects' sustained attention decreased...
2016: PloS One
https://www.readbyqxmd.com/read/27681211/the-metabolic-syndrome-among-danish-seafarers-a-follow-up-study
#12
Jørgen Riis Jepsen, Hanna B Rasmussen
BACKGROUND: The metabolic syndrome (MS) represents a cluster of risk factors related to insulin resistance. Metabolic syndrome is a strong risk factor for chronic metabolic and cardiovascular diseases and is related to nutritional factors, sleep patterns, work-related stress, fatigue, and physical activity - all of which are critical issues at sea. We have previously demonstrated a MS prevalence of 24.2% in Danish seafarers. This study aimed to follow the trend of MS after 2 years' intervention...
2016: International Maritime Health
https://www.readbyqxmd.com/read/27663764/the-countermovement-jump-to-monitor-neuromuscular-status-a-meta-analysis
#13
João Gustavo Claudino, John Cronin, Bruno Mezêncio, Daniel Travis McMaster, Michael McGuigan, Valmor Tricoli, Alberto Carlos Amadio, Julio Cerca Serrão
OBJECTIVES: The primary objective of this meta-analysis was to compare countermovement jump (CMJ) performance in studies that reported the highest value as opposed to average value for the purposes of monitoring neuromuscular status (i.e., fatigue and supercompensation). The secondary aim was to determine the sensitivity of the dependent variables. DESIGN: Systematic review with meta-analysis. METHODS: The meta-analysis was conducted on the highest or average of a number of CMJ variables...
August 25, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27649778/effects-of-a-single-oral-60-mg-caffeine-dose-on-attention-in-healthy-adult-subjects
#14
Micha Mm Wilhelmus, Justin L Hay, Rob Gja Zuiker, Pieter Okkerse, Christelle Perdrieu, Julien Sauser, Maurice Beaumont, Jeroen Schmitt, Joop Ma van Gerven, Beata Y Silber
Caffeine induces positive effects on sustained attention, although studies assessing the acute effects of low caffeine dose (<75 mg) on sustained attention are limited and use short-term tests. Therefore, we investigated the acute effects of a 60 mg dose of caffeine on sustained attention in tests lasting up to 45 minutes using 82 low or non-caffeine-consuming healthy male (n=41) and female (n=41) adults aged between 40 and 60 years. Vigilance was measured using Mackworth Clock test, Rapid Visual Information Processing Test, adaptive tracking test, saccadic eye movement and attention switch test...
September 20, 2016: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/27634141/dopamine-receptor-dop-4-modulates-habituation-to-repetitive-photoactivation-of-a-c-elegans-polymodal-nociceptor
#15
Evan L Ardiel, Andrew C Giles, Alex J Yu, Theodore H Lindsay, Shawn R Lockery, Catharine H Rankin
Habituation is a highly conserved phenomenon that remains poorly understood at the molecular level. Invertebrate model systems, like Caenorhabditis elegans, can be a powerful tool for investigating this fundamental process. Here we established a high-throughput learning assay that used real-time computer vision software for behavioral tracking and optogenetics for stimulation of the C. elegans polymodal nociceptor, ASH. Photoactivation of ASH with ChR2 elicited backward locomotion and repetitive stimulation altered aspects of the response in a manner consistent with habituation...
October 2016: Learning & Memory
https://www.readbyqxmd.com/read/27631990/validation-of-sleep-2-peak-a-smartphone-application-that-can-detect-fatigue-related-changes-in-reaction-times-during-sleep-deprivation
#16
Jean-François Brunet, Dominique Dagenais, Marc Therrien, Daniel Gartenberg, Geneviève Forest
Despite its high sensitivity and validity in the context of sleep loss, the Psychomotor Vigilance Test (PVT) could be improved. The aim of the present study was to validate a new smartphone PVT-type application called sleep-2-Peak (s2P) by determining its ability to assess fatigue-related changes in alertness in a context of extended wakefulness. Short 3-min versions of s2P and of the classic PVT were administered at every even hour during a 35-h total sleep deprivation protocol. In addition, subjective measures of sleepiness were collected...
September 8, 2016: Behavior Research Methods
https://www.readbyqxmd.com/read/27573811/assessing-fatigability-in-the-lab-and-in-daily-life-in-older-adults-with-osteoarthritis-using-perceived-performance-and-ecological-measures
#17
Susan L Murphy, Anna L Kratz, Stacey L Schepens Niemiec
BACKGROUND: Fatigue in older adults is associated with functional decline and reduced participation in daily life; however, it is not well characterized. Examining fatigue within activity performance, or "fatigability," is a recommended approach to begin to understand fatigue and its underlying mechanisms. This study examined the construct validity of lab-based measures of fatigability and compared these measures with fatigability in daily life (termed ecological fatigability). METHODS: Participants with osteoarthritis and fatigue (n = 163) underwent laboratory assessments, completed questionnaires, and wore accelerometers for 7 days while tracking symptoms and behaviors...
August 29, 2016: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/27571023/-shifts-in-attention-during-mental-fatigue-evidence-from-subjective-behavioral-physiological-and-eye-tracking-data-correction-to-hopstaken-et-al-2016
#18
(no author information available yet)
Reports an error in "Shifts in attention during mental fatigue: Evidence from subjective, behavioral, physiological, and eye-tracking data" by Jesper F. Hopstaken, Dimitri van der Linden, Arnold B. Bakker, Michiel A. J. Kompier and Yik Kiu Leung (, 2016[Jun], Vol 42[6], 878-889). In the article, there were formatting errors in columns 1 through 8 of Table 2. The correct table is present in the erratum. (The following abstract of the original article appeared in record .) There is an increasing amount of evidence that during mental fatigue, shifts in motivation drive performance rather than reductions in finite mental energy...
September 2016: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/27479831/direct-observation-assessing-orthopaedic-trainee-competence-in-the-ambulatory-setting
#19
Donna P Phillips, Joseph D Zuckerman, Adina Kalet, Kenneth A Egol
The Accreditation Council of Graduate Medical Education requires that residency programs teach and assess trainees in six core competencies. Assessments are imperative to determine trainee competence and to ensure that excellent care is provided to all patients. A structured, direct observation program is feasible for assessing nontechnical core competencies and providing trainees with immediate constructive feedback. Direct observation of residents in the outpatient setting by trained faculty allows assessment of each core competency...
September 2016: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/27447514/soft-route-to-4d-tomography
#20
Thibault Taillandier-Thomas, Stéphane Roux, François Hild
Based on the assumption that the time evolution of a sample observed by computed tomography requires many less parameters than the definition of the microstructure itself, it is proposed to reconstruct these changes based on the initial state (using computed tomography) and very few radiographs acquired at fixed intervals of time. This Letter presents a proof of concept that for a fatigue cracked sample its kinematics can be tracked from no more than two radiographs in situations where a complete 3D view would require several hundreds of radiographs...
July 8, 2016: Physical Review Letters
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