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Low frequency fatigue

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https://www.readbyqxmd.com/read/28877130/fatigue-following-burn-injury-a-burn-model-system-national-database-study
#1
Laura C Simko, Leda F Espinoza, Kara McMullen, David N Herndon, Oscar Suman, James A Fauerbach, Karen Kowalske, Shelley Wiechman, Lewis E Kazis, Colleen M Ryan, Jeffrey C Schneider
Fatigue is a commonly reported but not well-documented symptom following burn injury. This study's objective was to determine the frequency and severity of fatigue over time and to identify predictors of fatigue in the adult burn population. Data from the Burn Model System National Database (April 1997 to January 2006) were analyzed. Individuals over 18 years of age who were alive at discharge were included. The vitality subscale of the Short-Form 36 Item Health Survey was examined at preinjury and discharge and at 6, 12, and 24 months postinjury...
August 31, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28836890/hip-abductor-fatigability-and-recovery-are-related-to-the-development-of-low-back-pain-during-prolonged-standing
#2
Daniel Viggiani, Jack P Callaghan
A prolonged standing exposure can identify asymptomatic adults who have a higher risk of developing clinical low back pain later in life. Hip abductor cocontraction differences can predict low back pain development during standing exposures. This study's purpose was to determine if hip abductor strength, fatigability, and recovery during prolonged standing were related to standing-induced low back pain. Forty young, asymptomatic adults (50% female) performed two 2-hour standing sessions, a fatiguing hip abductor exercise was performed prior to one of the two standing sessions...
August 24, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28817081/multiphysics-simulation-of-low-amplitude-acoustic-wave-detection-by-piezoelectric-wafer-active-sensors-validated-by-in-situ-ae-fatigue-experiment
#3
Md Yeasin Bhuiyan, Victor Giurgiutiu
Piezoelectric wafer active sensors (PWAS) are commonly used for detecting Lamb waves for structural health monitoring application. However, in most applications of active sensing, the signals are of high-amplitude and easy to detect. In this article, we have shown a new avenue of using the PWAS transducer for detecting the low-amplitude fatigue-crack related acoustic emission (AE) signals. Multiphysics finite element (FE) simulations were performed with two PWAS transducers bonded to the structure. Various configurations of the sensors were studied by using the simulations...
August 17, 2017: Materials
https://www.readbyqxmd.com/read/28773064/a-combined-high-and-low-cycle-fatigue-model-for-life-prediction-of-turbine-blades
#4
Shun-Peng Zhu, Peng Yue, Zheng-Yong Yu, Qingyuan Wang
Combined high and low cycle fatigue (CCF) generally induces the failure of aircraft gas turbine attachments. Based on the aero-engine load spectrum, accurate assessment of fatigue damage due to the interaction of high cycle fatigue (HCF) resulting from high frequency vibrations and low cycle fatigue (LCF) from ground-air-ground engine cycles is of critical importance for ensuring structural integrity of engine components, like turbine blades. In this paper, the influence of combined damage accumulation on the expected CCF life are investigated for turbine blades...
June 26, 2017: Materials
https://www.readbyqxmd.com/read/28772303/effect-of-vitamin-d-deficiency-on-voice
#5
Abdul-Latif Hamdan, Georges Ziade, Doja Sarieddine, Dollen Tabri, Fatima Allaw, Rachel Btaiche, Sami Azar
Purpose: The purpose of this article was to investigate the relationship between low level of vitamin D, phonatory symptoms, and acoustic findings. Method: A total of 38 subjects presenting to the endocrinology clinic were enrolled in 2 groups: 19 with vitamin D deficiency who were not on treatment, and 19 with normal vitamin D level who were on treatment. Demographic data included age, gender, and history of smoking. All patients were asked about the presence or absence of dysphonia, degree of phonatory effort, and vocal fatigue...
August 15, 2017: American Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/28765804/integrated-fixation-cage-loosening-under-fatigue-loading
#6
Srinidhi Nagaraja, Vivek Palepu
BACKGROUND: Screw loosening is a well-known adverse event in traditional spinal fusion instrumentation. This phenomenon may hinder segmental stability of the spine leading to bony non-union. In recent years numerous lumbar integrated fixation cages (IFC) have been introduced that offer a low profile alternative to a standard cage with an anterior plate (AP+C). The fixation approach for IFCs is different than a traditional anterior approach; therefore, it is unclear whether IFCs may loosen from the surrounding bone over time...
2017: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/28758313/altered-theta-oscillations-in-resting-eeg-of-fibromyalgia-syndrome-patients
#7
N Fallon, Y Chiu, T Nurmikko, A Stancak
BACKGROUND: Fibromyalgia syndrome (FM) is a chronic pain disorder characterized by widespread pain, sleep disturbance, fatigue and cognitive/affective symptoms. Functional imaging studies have revealed that FM and other chronic pain syndromes can affect resting brain activity. This study utilized electroencephalographic (EEG) recordings to investigate the relative power of ongoing oscillatory activity in the resting brain. METHODS: A 64-channel EEG was recorded at rest in 19 female FM patients and 18 healthy, age-matched, control subjects...
July 31, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28738029/confronting-compassion-fatigue-assessment-and-intervention-in-inpatient-oncology%C3%A2
#8
Lisa M Zajac, Katherine J Moran, Carla J Groh
BACKGROUND: A notable variation among patient satisfaction scores with nursing care was identified. Contributing factors were examined and revealed significant negative correlations between the unit death rate and surviving patients' satisfaction scores. Compassion fatigue (CF) was hypothesized to be a major contributing factor.
. OBJECTIVES: The objective was to address CF in RNs and oncology care associates (assistive personnel) by developing an intervention to provide bereavement support to staff after patient deaths...
August 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/28721027/frequency-of-frailty-and-its-association-with-cognitive-status-and-survival-in-older-chileans
#9
Cecilia Albala, Lydia Lera, Hugo Sanchez, Barbara Angel, Carlos Márquez, Patricia Arroyo, Patricio Fuentes
BACKGROUND: Age-associated brain physiologic decline and reduced mobility are key elements of increased age-associated vulnerability. OBJECTIVE: To study the frequency of frailty phenotype and its association with mental health and survival in older Chileans. METHODS: Follow-up of ALEXANDROS cohorts designed to study disability associated with obesity in community-dwelling people 60 years and older living in Santiago, Chile. At baseline, 2,098 (67% women) of 2,372 participants were identified as having the frailty phenotype: weak handgrip dynamometry, unintentional weight loss, fatigue/exhaustion, five chair-stands/slow walking speed and difficulty walking (low physical activity)...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28709880/low-intensity-transcranial-electric-stimulation-safety-ethical-legal-regulatory-and-application-guidelines
#10
REVIEW
A Antal, I Alekseichuk, M Bikson, J Brockmöller, A R Brunoni, R Chen, L G Cohen, G Dowthwaite, J Ellrich, A Flöel, F Fregni, M S George, R Hamilton, J Haueisen, C S Herrmann, F C Hummel, J P Lefaucheur, D Liebetanz, C K Loo, C D McCaig, C Miniussi, P C Miranda, V Moliadze, M A Nitsche, R Nowak, F Padberg, A Pascual-Leone, W Poppendieck, A Priori, S Rossi, P M Rossini, J Rothwell, M A Rueger, G Ruffini, K Schellhorn, H R Siebner, Y Ugawa, A Wexler, U Ziemann, M Hallett, W Paulus
Low intensity transcranial electrical stimulation (TES) in humans, encompassing transcranial direct current (tDCS), transcutaneous spinal Direct Current Stimulation (tsDCS), transcranial alternating current (tACS), and transcranial random noise (tRNS) stimulation or their combinations, appears to be safe. No serious adverse events (SAEs) have been reported so far in over 18,000 sessions administered to healthy subjects, neurological and psychiatric patients, as summarized here. Moderate adverse events (AEs), as defined by the necessity to intervene, are rare, and include skin burns with tDCS due to suboptimal electrode-skin contact...
September 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28694809/unperturbed-cytotoxic-lymphocyte-phenotype-and-function-in-myalgic-encephalomyelitis-chronic-fatigue-syndrome-patients
#11
Jakob Theorell, Indre Bileviciute-Ljungar, Bianca Tesi, Heinrich Schlums, Mette Sophie Johnsgaard, Babak Asadi-Azarbaijani, Elin Bolle Strand, Yenan T Bryceson
Myalgic encephalomyelitis or chronic fatigue syndrome (ME/CFS) is a debilitating disorder linked to diverse intracellular infections as well as physiological stress. Cytotoxic lymphocytes combat intracellular infections. Their function is attenuated by stress. Despite numerous studies, the role of cytotoxic lymphocytes in ME/CFS remains unclear. Prompted by advances in the understanding of defects in lymphocyte cytotoxicity, the discovery of adaptive natural killer (NK) cell subsets associated with certain viral infections, and compelling links between stress, adrenaline, and cytotoxic lymphocyte function, we reassessed the role of cytotoxic lymphocytes in ME/CFS...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28671265/corticosteroids-for-adult-patients-with-advanced-cancer-who-have-nausea-and-vomiting-not-related-to-chemotherapy-radiotherapy-or-surgery
#12
REVIEW
Petra Vayne-Bossert, Alison Haywood, Phillip Good, Sohil Khan, Kirsty Rickett, Janet R Hardy
BACKGROUND: Nausea is a common symptom in advanced cancer, with a prevalence of up to 70%. While nausea and vomiting can be related to cancer treatments, such as chemotherapy, radiotherapy, or surgery, a significant number of people with advanced cancer also suffer from nausea unrelated to such therapies. Nausea and vomiting may also cause psychological distress, and have a negative impact on the quality of life of cancer patients; similarly to pain, nausea is often under-treated. The exact mechanism of action of corticosteroids on nausea is unclear, however, they are used to manage a number of cancer-specific complications, including spinal cord compression, raised intracranial pressure, and lymphangitis carcinomatosis...
July 3, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28663063/development-of-focal-segmental-glomerulosclerosis-patient-reported-outcome-measures-symptom-diary-and-symptom-impact-questionnaire
#13
Susan D Mathias, Susan Vallow, Debbie S Gipson, Kevin S Thorneloe, Dennis Sprecher
BACKGROUND: Focal segmental glomerulosclerosis (FSGS) is a kidney disease that affects patients' functioning and well-being. This study aimed to develop patient-reported outcome questionnaires to measure patient experiences related to FSGS. STUDY DESIGN: Qualitative patient interviews to identify important symptoms and concepts (concept elicitation) formed the basis for the development of 2 questionnaires, one on symptoms and one on their impact. Additional qualitative interviews were implemented to evaluate/refine the questionnaires (cognitive debriefing)...
June 26, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28660874/occupational-exposure-to-fluorescent-light-in-a-pathologist-with-myopic-complications-and-asthenopia-onset
#14
Marco Quarato, Maria Franca Gatti, Luigi De Maria, Antonio Caputi, Fulvio Italo Maria Fucilli, Luigi Vimercati
BACKGROUND: Pathologic myopia is often associated with many complications, e.g. retinopathy, vitreous detachment and glaucoma. To date, occupational exposure of workers suffering from myopic co-morbidities to fluorescence light is not clearly linked to a worsening of retinal damage and eye symptoms. CASE REPORT: A 56-year-old pathologist, suffering from myopic retinopathy and other ocular comorbidities, asked for medical examination due to worsening vision and burning eyes, after occupational exposure to fluorescence microscope...
June 28, 2017: La Medicina del Lavoro
https://www.readbyqxmd.com/read/28632052/motor-unit-firing-frequency-of-lower-limb-muscles-during-an-incremental-slide-board-skating-test
#15
Tatiane Piucco, Rodrigo Bini, Masanori Sakaguchi, Fernando Diefenthaeler, Darren Stefanyshyn
This study investigated how the combination of workload and fatigue affected the frequency components of muscle activation and possible recruitment priority of motor units during skating to exhaustion. Ten male competitive speed skaters performed an incremental maximal test on a slide board. Activation of six muscles from the right leg was recorded throughout the test. A time-frequency analysis was performed to compute overall, high, and low frequency bands from the whole signal at 10, 40, 70, and 90% of total test time...
November 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28599994/vocal-tract-discomfort-and-voice-related-quality-of-life-in-wind-instrumentalists
#16
Juliane Cappellaro, Bárbara Costa Beber
OBJECTIVE: This study aimed to investigate vocal tract discomfort and quality of life in the voice of wind instrumentalists. METHOD: It is a cross-sectional study. The sample was composed of 37 musicians of the orchestra of Caxias do Sul city, RS, Brazil. The participants answered a nonstandard questionnaire about demographic and professional information, the Voice-Related Quality of Life (V-RQOL), the Vocal Tract Discomfort (VTD) scale, and additional items about fatigue after playing the instrument and pain in the cervical muscles...
June 6, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28562624/application-of-a-single-flicker-online-ssvep-bci-for-spatial-navigation
#17
Jingjing Chen, Dan Zhang, Andreas K Engel, Qin Gong, Alexander Maye
A promising approach for brain-computer interfaces (BCIs) employs the steady-state visual evoked potential (SSVEP) for extracting control information. Main advantages of these SSVEP BCIs are a simple and low-cost setup, little effort to adjust the system parameters to the user and comparatively high information transfer rates (ITR). However, traditional frequency-coded SSVEP BCIs require the user to gaze directly at the selected flicker stimulus, which is liable to cause fatigue or even photic epileptic seizures...
2017: PloS One
https://www.readbyqxmd.com/read/28558424/on-the-biophysical-mechanism-of-sensing-atmospheric-discharges-by-living-organisms
#18
Dimitris J Panagopoulos, Alfonso Balmori
Atmospheric electrical discharges during thunderstorms, and the related electromagnetic fields (EMFs)/waves called sferics, can be sensed by humans at long distances through a variety of symptoms, mainly headache, fatigue, etc. Up to today there is no explanation for this association. Sferics consist of partially polarized electromagnetic pulses with an oscillating carrier signal in the very low frequency (VLF) band and a pulse repetition frequency in the extremely low frequency (ELF) band. Their ELF intensity may reach ~5mV/m at global ranges, and ~0...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28545789/frequency-of-somatic-symptoms-in-the-general-population-normative-values-for-the-patient-health-questionnaire-15-phq-15
#19
Andreas Hinz, Jochen Ernst, Heide Glaesmer, Elmar Brähler, Franziska G Rauscher, Katja Petrowski, Rüya-Daniela Kocalevent
BACKGROUND: The PHQ-15 is widely used as an open access screening instrument for somatic symptoms in different health care settings. The objectives of the study were to contribute to the construct validity and to generate normative data for the PHQ-15. METHODS: The survey was conducted in the general population in Germany from August 2011 to November 2014 (n=9250). All participants underwent an extensive core assessment including a set of questionnaires. RESULTS: Men reported significantly less (p<0...
May 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/28515833/time-course-of-changes-in-neuromuscular-responses-at-30-versus-70-1-repetition-maximum-during-dynamic-constant-external-resistance-leg-extensions-to-failure
#20
Cory M Smith, Terry J Housh, Ethan C Hill, Richard J Schmidt, Glen O Johnson
The purpose of the current study was to examine the time course of changes in neuromuscular responses from the vastus medialis (VM) during low versus high intensity dynamic constant external resistance (DCER) leg extension muscle actions to failure. Thirteen men performed DCER leg extensions to failure at 30% and 70% 1-repetition maximum (1-RM) as well as 1-RM measurements pretest and posttest. Electromyogaphy and mechanomyographic signals were measured from the VM. There were no differences in neuromuscular responses pretest versus posttest 1-RM...
2017: International Journal of Exercise Science
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