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Neural fatigue

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https://www.readbyqxmd.com/read/28702901/implications-of-impaired-endurance-peffects-of-endurance-training-orformance-following-single-bouts-of-resistance-training-an-alternate-concurrent-training-perspective
#1
REVIEW
Kenji Doma, Glen B Deakin, David J Bentley
A single bout of resistance training induces residual fatigue, which may impair performance during subsequent endurance training if inadequate recovery is allowed. From a concurrent training standpoint, such carry-over effects of fatigue from a resistance training session may impair the quality of a subsequent endurance training session for several hours to days with inadequate recovery. The proposed mechanisms of this phenomenon include: (1) impaired neural recruitment patterns; (2) reduced movement efficiency due to alteration in kinematics during endurance exercise and increased energy expenditure; (3) increased muscle soreness; and (4) reduced muscle glycogen...
July 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28702807/effect-of-rest-pause-vs-traditional-bench-press-training-on-muscle-strength-electromyography-and-lifting-volume-in-randomized-trial-protocols
#2
J Adam Korak, Max R Paquette, Justin Brooks, Dana K Fuller, John M Coons
PURPOSE: Rest-pause (4-s unloaded rest between repetitions) training effects on one repetition maximum (1 RM), lifting volume, and neural activation via electromyography (EMG) are currently vague in the literature and can benefit strength and conditioning professionals for resistance training programme design. Therefore, this study compared 1 RM, neural activation via (EMG), and volume differences between rest-pause vs. traditional resistance training. METHODS: Trained males (N = 20) were randomly assigned to either a rest-pause or a traditional training group...
July 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28681715/motor-cortex-trns-improves-pain-affective-and-cognitive-impairment-in-patients-with-fibromyalgia-preliminary-results-of-a-randomised-sham-controlled-trial
#3
Massimiliano Curatolo, Giuseppe La Bianca, Giuseppe Cosentino, Roberta Baschi, Giuseppe Salemi, Rossella Talotta, Marcello Romano, Giovanni Triolo, Marina De Tommaso, Brigida Fierro, Filippo Brighina
OBJECTIVES: Fibromyalgia (FM) is a clinical syndrome characterised by widespread musculoskeletal pain, chronic fatigue, cognitive deficits, and sleep and mood disorders. The effectiveness of most pharmacological treatments is limited, and there is a need for new, effective and well-tolerated therapies. It has recently been shown that transcranial direct-current stimulation (tDCS) of the motor cortex reduces pain, and that tDCS of the dorso-lateral prefrontal cortex (DLPFC) improves anxiety, depression and cognitive impairment in FM patients...
May 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28665361/a-study-of-deep-cnn-based-classification-of-open-and-closed-eyes-using-a-visible-light-camera-sensor
#4
Ki Wan Kim, Hyung Gil Hong, Gi Pyo Nam, Kang Ryoung Park
The necessity for the classification of open and closed eyes is increasing in various fields, including analysis of eye fatigue in 3D TVs, analysis of the psychological states of test subjects, and eye status tracking-based driver drowsiness detection. Previous studies have used various methods to distinguish between open and closed eyes, such as classifiers based on the features obtained from image binarization, edge operators, or texture analysis. However, when it comes to eye images with different lighting conditions and resolutions, it can be difficult to find an optimal threshold for image binarization or optimal filters for edge and texture extraction...
June 30, 2017: Sensors
https://www.readbyqxmd.com/read/28659838/the-robust-running-ape-unraveling-the-deep-underpinnings-of-coordinated-human-running-proficiency
#5
REVIEW
John Kiely
In comparison to other mammals, humans are not especially strong, swift or supple. Nevertheless, despite these apparent physical limitations, we are among Natures most superbly well-adapted endurance runners. Paradoxically, however, notwithstanding this evolutionary-bestowed proficiency, running-related injuries, and Overuse syndromes in particular, are widely pervasive. The term 'coordination' is similarly ubiquitous within contemporary coaching, conditioning, and rehabilitation cultures. Various theoretical models of coordination exist within the academic literature...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28647831/alterations-in-regional-homogeneity-of-resting-state-brain-activity-in-fatigue-of-parkinson-s-disease
#6
Junyi Li, Yongsheng Yuan, Min Wang, Jiejin Zhang, Li Zhang, Siming Jiang, Jian Ding, Kezhong Zhang
Fatigue is a common complaint in patients with Parkinson's disease (PD). However, the neural bases of fatigue in PD remain uncertain. In this cross-sectional study, our aim was to study the change of the local brain function in PD patients with fatigue. Among 49 patients with PD, 17 of them had fatigue and the remaining 32 patients without fatigue, and 25 age- and gender-matched healthy controls were enrolled. All subjects were evaluated with Fatigue Severity Scale (FSS) and had a resting-state functional magnetic resonance imaging (rs-fMRI) scan...
June 24, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28638328/protocol-for-the-reconstructing-consciousness-and-cognition-reccognition-study
#7
Kaitlyn L Maier, Andrew R McKinstry-Wu, Ben Julian A Palanca, Vijay Tarnal, Stefanie Blain-Moraes, Mathias Basner, Michael S Avidan, George A Mashour, Max B Kelz
Important scientific and clinical questions persist about general anesthesia despite the ubiquitous clinical use of anesthetic drugs in humans since their discovery. For example, it is not known how the brain reconstitutes consciousness and cognition after the profound functional perturbation of the anesthetized state, nor has a specific pattern of functional recovery been characterized. To date, there has been a lack of detailed investigation into rates of recovery and the potential orderly return of attention, sensorimotor function, memory, reasoning and logic, abstract thinking, and processing speed...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28619425/using-endogenous-saccades-to-characterize-fatigue-in-multiple-sclerosis
#8
Marisa Ferreira, Paulo A Pereira, Marta Parreira, Inês Sousa, José Figueiredo, João J Cerqueira, Antonio F Macedo
PURPOSE: Multiple Sclerosis (MS) is likely to cause dysfunction of neural circuits between brain regions increasing brain working load or a subjective overestimation of such working load leading to fatigue symptoms. The aim of this study was to investigate if saccades can reveal the effect of fatigue in patients with MS. METHODS: Patients diagnosed with MS (EDSS<=3) and age matched controls were recruited. Eye movements were monitored using an infrared eyetracker...
May 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/28611575/ica-derived-eeg-correlates-to-mental-fatigue-effort-and-workload-in-a-realistically-simulated-air-traffic-control-task
#9
Deepika Dasari, Guofa Shou, Lei Ding
Electroencephalograph (EEG) has been increasingly studied to identify distinct mental factors when persons perform cognitively demanding tasks. However, most of these studies examined EEG correlates at channel domain, which suffers the limitation that EEG signals are the mixture of multiple underlying neuronal sources due to the volume conduction effect. Moreover, few studies have been conducted in real-world tasks. To precisely probe EEG correlates with specific neural substrates to mental factors in real-world tasks, the present study examined EEG correlates to three mental factors, i...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28608135/can-proportional-ventilation-modes-facilitate-exercise-in-critically-ill-patients-a-physiological-cross-over-study-pressure-support-versus-proportional-ventilation-during-lower-limb-exercise-in-ventilated-critically-ill-patients
#10
Evangelia Akoumianaki, Nicolas Dousse, Aissam Lyazidi, Jean-Claude Lefebvre, Severine Graf, Ricardo Luiz Cordioli, Nathalie Rey, Jean-Christophe Marie Richard, Laurent Brochard
BACKGROUND: Early exercise of critically ill patients may have beneficial effects on muscle strength, mass and systemic inflammation. During pressure support ventilation (PSV), a mismatch between demand and assist could increase work of breathing and limit exercise. A better exercise tolerance is possible with a proportional mode of ventilation (Proportional Assist Ventilation, PAV+ and Neurally Adjusted Ventilatory Assist, NAVA). We examined whether, in critically ill patients, PSV and proportional ventilation have different effects on respiratory muscles unloading and work efficiency during exercise...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28595261/speech-processing-fatigue-in-children-auditory-event-related-potential-and-behavioral-measures
#11
Alexandra P Key, Samantha J Gustafson, Lindsey Rentmeester, Benjamin W Y Hornsby, Fred H Bess
Purpose: Fatigue related to speech processing is an understudied area that may have significant negative effects, especially in children who spend the majority of their school days listening to classroom instruction. Method: This study examined the feasibility of using auditory P300 responses and behavioral indices (lapses of attention and self-report) to measure fatigue resulting from sustained listening demands in 27 children (M = 9.28 years). Results: Consistent with predictions, increased lapses of attention, longer reaction times, reduced P300 amplitudes to infrequent target stimuli, and self-report of greater fatigue were observed after the completion of a series of demanding listening tasks compared with the baseline values...
June 7, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28592684/trajectory-curvature-in-saccade-sequences-spatiotopic-influences-vs-residual-motor-activity
#12
Geoffrey Mégardon, Casimir Johannes Hendrikus Ludwig, Petroc Sumner
When decisions drive saccadic eye movements, traces of the decision process can be inferred from the movement trajectories. For example, saccades can curve away from distractor stimuli, which was thought to reflect cortical inhibition biasing activity in the Superior Colliculus. Recent neurophysiological work does not support this theory, and two recent models have replaced top-down inhibition with lateral interactions in the Superior Colliculus or neural fatigue in the brainstem Saccadic Burst Generator. All current models operate in retinotopic coordinates and are based on single saccade paradigms...
June 7, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28587072/automatic-detection-of-driver-fatigue-using-driving-operation-information-for-transportation-safety
#13
Zuojin Li, Liukui Chen, Jun Peng, Ying Wu
Fatigued driving is a major cause of road accidents. For this reason, the method in this paper is based on the steering wheel angles (SWA) and yaw angles (YA) information under real driving conditions to detect drivers' fatigue levels. It analyzes the operation features of SWA and YA under different fatigue statuses, then calculates the approximate entropy (ApEn) features of a short sliding window on time series. Using the nonlinear feature construction theory of dynamic time series, with the fatigue features as input, designs a "2-6-6-3" multi-level back propagation (BP) Neural Networks classifier to realize the fatigue detection...
May 25, 2017: Sensors
https://www.readbyqxmd.com/read/28582903/magnetic-stimulation-at-acupoints-relieves-mental-fatigue-an-event-related-potential-p300-study
#14
Shuo Yang, Yanyun Qiao, Lei Wang, Pengru Hao
BACKGROUND: Mental fatigue caused by continuous cognitive tasks represents one of the most worrying modern health problems. Event Related Potential (ERP) P300 is thought to be associated with cognitive function. OBJECTIVE: This study aimed at characterizing the neural activity correlated with the attentional processes and exploring a novelty method which combine the magnetic stimulation and acupoint to relieve mental fatigue caused by continuous cognitive tasks...
May 19, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28561175/-multiple-sclerosis-fatigue-its-neural-correlates-and-its-modulation-with-tdcs
#15
Samar S Ayache, Moussa A Chalah, Tania Kümpfel, Frank Padberg, Jean-Pascal Lefaucheur, Ulrich Palm
Multiple sclerosis (MS) is a chronic progressive and inflammatory disease of the central nervous system and causes high rates of non-traumatic disability in young adults. Fatigue is frequently reported by a major part of patients during the disease course and dramatically increases the burden of illness. Despite the high prevalence of fatigue and its enormous impact on quality of life, its pathophysiological mechanisms are still unclear. Its etiology is multifactorial and complex, and is usually classified into 'primary' fatigue resulting from the pathological brain changes versus 'secondary' fatigue following disease symptoms, sleep disturbances, mood disorders, and side effects of medication...
May 2017: Fortschritte der Neurologie-Psychiatrie
https://www.readbyqxmd.com/read/28559851/estimating-neural-control-from-concentric-vs-eccentric-surface-electromyographic-representations-during-fatiguing-cyclic-submaximal-back-extension-exercises
#16
Gerold R Ebenbichler, Lena Unterlerchner, Richard Habenicht, Paolo Bonato, Josef Kollmitzer, Patrick Mair, Sara Riegler, Thomas Kienbacher
Purpose: To investigate the differences in neural control of back muscles activated during the eccentric vs. the concentric portions of a cyclic, submaximal, fatiguing trunk extension exercise via the analysis of amplitude and time-frequency parameters derived from surface electromyographic (SEMG) data. Methods: Using back dynamometers, 87 healthy volunteers performed three maximum voluntary isometric trunk extensions (MVC's), an isometric trunk extension at 80% MVC, and 25 cyclic, dynamic trunk extensions at 50% MVC...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28558835/a-muscle-driven-approach-to-restore-stepping-with-an-exoskeleton-for-individuals-with-paraplegia
#17
Sarah R Chang, Mark J Nandor, Lu Li, Rudi Kobetic, Kevin M Foglyano, John R Schnellenberger, Musa L Audu, Gilles Pinault, Roger D Quinn, Ronald J Triolo
BACKGROUND: Functional neuromuscular stimulation, lower limb orthosis, powered lower limb exoskeleton, and hybrid neuroprosthesis (HNP) technologies can restore stepping in individuals with paraplegia due to spinal cord injury (SCI). However, a self-contained muscle-driven controllable exoskeleton approach based on an implanted neural stimulator to restore walking has not been previously demonstrated, which could potentially result in system use outside the laboratory and viable for long term use or clinical testing...
May 30, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28553882/functional-brain-connectivity-of-remembered-fatigue-or-happiness-in-healthy-adults-use-of-arterial-spin-labeling
#18
Jeff Boissoneault, Landrew Sevel, Michael E Robinson, Roland Staud
INTRODUCTION: Chronic fatiguing illnesses like cancer, multiple sclerosis, chronic fatigue syndrome, or depression are frequently associated with comorbidities including depression, pain, and insomnia, making the study of their neural correlates challenging. To study fatigue without such comorbidities, functional connectivity (FC) analyses were used in healthy individuals to study brain activity during recall of a fatiguing event inside the MRI scanner. A positive mood induction served as control condition...
May 29, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28512409/immunoglobulin-d-multiple-myeloma-presenting-as-spontaneous-fracture
#19
Samer Al Hadidi, Khalil Katato, Ghassan Bachuwa
Immunoglobulin D multiple myeloma is a rare type of multiple myeloma that usually presents as bone pain, fatigue, or weight loss. We report a case of immunoglobulin D multiple myeloma in a 53-year-old Caucasian male patient with previous medical history of anaplastic oligodendroglioma status post-surgical resection who was evaluated for back pain while mowing the lawn. His physical examination showed tenderness over the lower thoracic vertebrae with no sensory or motor impairment. Initial lab investigations showed normocytic anemia and hypercalcemia with low parathyroid hormone...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28507192/performance-fatigability-mechanisms-and-task-specificity
#20
Sandra K Hunter
Performance fatigability is characterized as an acute decline in motor performance caused by an exercise-induced reduction in force or power of the involved muscles. Multiple mechanisms contribute to performance fatigability and originate from neural and muscular processes, with the task demands dictating the mechanisms. This review highlights that (1) inadequate activation of the motoneuron pool can contribute to performance fatigability, and (2) the demands of the task and the physiological characteristics of the population assessed, dictate fatigability and the involved mechanisms...
May 15, 2017: Cold Spring Harbor Perspectives in Medicine
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