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https://www.readbyqxmd.com/read/28219032/analysis-of-the-semg-force-relationship-using-hd-semg-technique-and-data-fusion-a-simulation-study
#1
Mariam Al Harrach, Vincent Carriou, Sofiane Boudaoud, Jeremy Laforet, Frederic Marin
The relationship between the surface Electromyogram (sEMG) signal and the force of an individual muscle is still ambiguous due to the complexity of experimental evaluation. However, understanding this relationship should be useful for the assessment of neuromuscular system in healthy and pathological contexts. In this study, we present a global investigation of the factors governing the shape of this relationship. Accordingly, we conducted a focused sensitivity analysis of the sEMG/force relationship form with respect to neural, functional and physiological parameters variation...
February 16, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28215005/effect-of-bite-openings-and-mandibular-protrusion-on-genioglossus-muscle-activity-in-healthy-adults-with-oral-appliance
#2
Jianlan Long, Toru Ogawa, Toshimi Ito, Michikazu Matsuda, Wei Li, Haiyang Yu, Keiichi Sasaki
Oral appliance (OA) can effectively treat obstructive sleep apnea; however, numerous types of oral appliances and designs are variable and the precise mechanisms behind differences in treatment outcomes are uncertain. The objective of this study was to evaluate the effects of different degrees of mandibular position [4° of bite openings (BO): 2, 4, 8 and 12 mm; and protrusion (P): 0, 50%, MAX], for both the upright and supine positions: BO2 mm_P0%, BO4 mm_P0%, BO4 mm_P50%, BO4 mm_PMAX, BO8 mm_P0%, BO12 mm_P0%; with an OA on the: (1) activity of the genioglossus (GG) muscle by electromyogram, (2) inspiration by airflow sensor, and (3) recording mandibular movements (incisor and mandibular condyle point) in each position...
February 18, 2017: Odontology
https://www.readbyqxmd.com/read/28213201/respiratory-load-perception-in-overweight-and-asthmatic-children
#3
Victoria MacBean, Lorna Wheatley, Alan C Lunt, Gerrard F Rafferty
Overweight asthmatic children report greater symptoms than normal weight asthmatics, despite comparable airflow obstruction. This has been widely assumed to be due to heightened perception of respiratory effort. Three groups of children (healthy weight controls, healthy weight asthmatics, overweight asthmatics) rated perceived respiratory effort throughout an inspiratory resistive loading protocol. Parasternal intercostal electromyogram was used as an objective marker of respiratory load; this was expressed relative to tidal volume and reported as a ratio of the baseline value (neuroventilatory activity ratio (NVEAR))...
February 14, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28213200/validation-of-a-quantitative-method-to-measure-neural-respiratory-drive-in-children-during-sleep
#4
Sandra Ya-Chu Chuang, Arthur Teng, Jane Elizabeth Butler, Simon Charles Gandevia, Hiran Selvadurai, Adam Jaffe
AIMS: Quantitatively measure and validate analysis of neural respiratory drive (NRD) using a commercial polysomnography system in children during sleep. METHOD: Surface electromyogram of the diaphragm (sEMGdi) recorded from primary snoring children were analysed. A subset was re-analysed to assess intra- and inter-investigator reproducibility. Effects of different band pass filter settings (20-100Hz vs 10-1000Hz) on sEMGdi amplitude were evaluated. RESULTS: Mean sEMGdi from 45 children aged 4...
February 14, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28194830/parasternal-intercostal-muscle-activity-during-methacholine-induced-bronchoconstriction
#5
Victoria MacBean, Claire L Pringle, Alan C Lunt, Keith D Sharp, Ashraf Ali, Anne Greenough, John Moxham, Gerrard F Rafferty
Neural respiratory drive, measured via the parasternal intercostal electromyogram (EMGpara), provides a non-invasive index of the load-capacity balance of the respiratory muscle pump. Previous studies in patients with obstructive lung disease have shown strong relationships between EMGpara and the extent of both airflow obstruction and hyperinflation. The relative influence of the two factors has not, however, been described. Airflow obstruction was induced via methacholine challenge testing in twenty-five adult humans...
February 14, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28192782/-electromyogram-biofeedback-in-patients-with-fibromyalgia-a-randomized-controlled-trial
#6
Eva Baumueller, Andreas Winkelmann, Dominik Irnich, Martin Weigl
No abstract text is available yet for this article.
January 31, 2017: Complement Med Res
https://www.readbyqxmd.com/read/28179011/cardiorespiratory-and-metabolic-responses-to-body-mass-based-squat-exercise-in-young-men
#7
Miki Haramura, Yohei Takai, Takaya Yoshimoto, Masayoshi Yamamoto, Hiroaki Kanehisa
BACKGROUND: The purpose of this study was to quantify cardiorespiratory and metabolic responses to body mass-based squat exercise, with specific emphasis on the relationships with the exercise duration. METHODS: Fifteen healthy young men performed body mass-based squat exercise as well as an incremental loaded bicycle test, which determine maximal oxygen uptake and maximal heart rate, with an interval of 2 days between the tests. During both tasks, oxygen uptake, blood lactate concentration (BLa), and heart rate (HR) were determined...
February 8, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28173645/-peripheral-nerve-injury-in-lama2-related-congenital-muscular-dystrophy-patients
#8
X P Liang, S Wang, W Zhang, Y Yuan, J Ding, X Z Chang, C J Wei, J Y Liu, H Xiong
Objective: To explore the injury pattern and features of peripheral nerve in congenital muscular dystrophy patients caused by LAMA2 gene mutation. Method: Seventeen patients genetically or molecular pathologically diagnosed as LAMA2-related congenital muscular dystrophy were recruited in Peking University First Hospital between 2002 and 2015. All the patients received nerve conduction velocity (NCV) and needle electromyography tests. Clinical and laboratory examination data of the patients was retrospectively analyzed...
February 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28160775/craniopharyngioma-presenting-with-severe-hyponatremia-hyponatremia-induced-myopathy-and-panhypopituitarism-a-case-report
#9
M D S A Dilrukshi, G V N Sandakumari, P K Abeysundara, T Chang
BACKGROUND: Craniopharyngiomas are rare intracranial tumors commonly presenting with neurological symptoms. Reports of severe hyponatremia as a presenting manifestation of a craniopharyngioma and hyponatremia-induced myopathy are rare. We report the case of a patient with craniopharyngioma presenting with severe hyponatremia, panhypopituitarism, and hyponatremia-induced myopathy. CASE PRESENTATION: A 52-year-old Sri Lankan man presented with anorexia, nausea, fatigue, generalized muscle weakness, and cramps for 1 week...
February 5, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28158258/comparison-of-muscle-synergies-for-running-between-different-foot-strike-patterns
#10
Koji Nishida, Shota Hagio, Benio Kibushi, Toshio Moritani, Motoki Kouzaki
It is well known that humans run with a fore-foot strike (FFS), a mid-foot strike (MFS) or a rear-foot strike (RFS). A modular neural control mechanism of human walking and running has been discussed in terms of muscle synergies. However, the neural control mechanisms for different foot strike patterns during running have been overlooked even though kinetic and kinematic differences between different foot strike patterns have been reported. Thus, we examined the differences in the neural control mechanisms of human running between FFS and RFS by comparing the muscle synergies extracted from each foot strike pattern during running...
2017: PloS One
https://www.readbyqxmd.com/read/28153523/systemic-administration-of-the-dietary-constituent-resveratrol-inhibits-the-nociceptive-jaw-opening-reflex-in-rats-via-the-endogenous-opioid-system
#11
Shyota Kokuba, Shiori Takehana, Katsuo Oshima, Yoshihito Shimazu, Mamoru Takeda
The aim of the present study was to investigate whether, under in vivo conditions, systemic administration of resveratrol could attenuate the rat nociceptive jaw-opening reflex (JOR) via the endogenous opioid system. The JOR evoked by electrical stimulation of the tongue was recorded as digastric muscle electromyograms (dEMG) in pentobarbital-anesthetized rats. The amplitude of the dEMG increased significantly in proportion to the intensity of electrical stimulation (from 1× to 5 × threshold for the JOR)...
January 30, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28139104/-animated-biofeedback-for-the-dysfunctional-voiding-syndrome
#12
M Fernández Ibieta, M J Guirao Piñera, G Zambudio Carmona, J Rojas Ticona, I Martínez Castaño, V Villamil, A Sánchez Sánchez, A García López, P Reyes Ríos, J I Ruiz Jiménez
OBJECTIVES: To analyze clinical and electromyographic treatment outcome of dysfunctional voiding (DV) with animated Biofeedback (Bfb). Clinical or electromyographic variables associated with higher success rate were checked. PATIENTS AND METHODS: Cross-sectional study of patients with DV, that in 2010- 2015 followed animated Bfb program. Efficacy was measured with Uroflowmetry, Electromyography (EMG) and validated clinical questionnaire. Inclusion criteria: no myelodysplasia, no anatomical malformations and a minumin of 3 Bfb sessions...
April 10, 2016: Cirugía Pediátrica: Organo Oficial de la Sociedad Española de Cirugía Pediátrica
https://www.readbyqxmd.com/read/28129305/positive-association-between-nightmares-and-heart-rate-response-to-loud-tones-relationship-to-parasympathetic-dysfunction-in-ptsd-nightmares
#13
Kaloyan S Tanev, Scott P Orr, Edward F Pace-Schott, Michael Griffin, Roger K Pitman, Patricia A Resick
Seventy-three women with posttraumatic stress disorder (PTSD) resulting from rape or physical assault participated in a loud-tone procedure, while skin conductance (SC), heart rate, and electromyogram responses were recorded. Pearson correlations were examined between each psychophysiological response and Clinician-Administered PTSD Scale (CAPS) symptom scores. Significant correlations were adjusted for each remaining individual PTSD symptom score. Heart rate response (HRR) significantly correlated with CAPS total score and with CAPS nightmares...
January 26, 2017: Journal of Nervous and Mental Disease
https://www.readbyqxmd.com/read/28129146/a-variance-distribution-model-of-surface-emg-signals-based-on-inverse-gamma-distribution
#14
Hideaki Hayashi, Akira Furui, Yuichi Kurita, Toshio Tsuji
OBJECTIVE: This paper describes the formulation of a surface electromyogram (EMG) model capable of representing the variance distribution of EMG signals. METHODS: In the model, EMG signals are handled based on a Gaussian white noise process with a mean of zero for each variance value. EMG signal variance is taken as a random variable that follows inverse gamma distribution, allowing the representation of noise superimposed onto this variance. Variance distribution estimation based on marginal likelihood maximization is also outlined in this paper...
January 25, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28127151/electromyogram-evoked-focal-myositis
#15
Avery Smith, George Snipes, Carolyn Quan
Focal myositis is a rarely reported inflammatory disease of skeletal muscle, particularly of an extremity. It is often misinterpreted as an infectious syndrome, leading to prolonged antibiotic use and a delay in immunosuppressive therapy. Without a confirmed etiology to date, we present a case of recurrent focal myositis following an electromyogram.
January 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28125658/alterations-in-neural-control-of-constant-isometric-contraction-with-the-size-of-error-feedback
#16
Ing-Shiou Hwang, Yen-Ting Lin, Wei-Min Huang, Zong-Ru Yang, Chia-Ling Hu, Yi-Ching Chen
Discharge patterns from a population of motor units (MUs) were estimated with multi-channel surface electromyogram and signal processing techniques to investigate parametric differences in low-frequency force fluctuations, MU discharges, and force-discharge relation during static force-tracking with varying sizes of execution error presented via visual feedback. Fourteen healthy adults produced isometric force at 10% of maximal voluntary contraction through index abduction under three visual conditions that scaled execution errors with different amplification factors...
2017: PloS One
https://www.readbyqxmd.com/read/28123712/asymptomatic-hyperckemia-during-a-two-year-monitoring-period-a-case-report-and-literature-overview
#17
Spyridon Klinis, Athanasios Symeonidis, Dimitrios Karanasios, Emmanouil K Symvoulakis
High creatine kinase (CK) levels can be associated with many disorders, including neuromuscular, cardiac, metabolic, endocrine and traumatic. Idiopathic hyperCKemia is a diagnostic dilemma for physicians even though its long-term prognosis is usually benign. We report a case of a Caucasian 61-year-old woman who presented as completely asymptomatic to her general practitioner with a serum CK (sCK) level at 6,122 IU/l. A complete diagnostic evaluation, including physical and laboratory examinations, electromyogram and muscle biopsy were negative for any neuromuscular or other disorder...
January 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28123431/tissue-engineered-rhesus-monkey-nerve-grafts-for-the-repair-of-long-ulnar-nerve-defects-similar-outcomes-to-autologous-nerve-grafts
#18
Chang-Qing Jiang, Jun Hu, Jian-Ping Xiang, Jia-Kai Zhu, Xiao-Lin Liu, Peng Luo
Acellular nerve allografts can help preserve normal nerve structure and extracellular matrix composition. These allografts have low immunogenicity and are more readily available than autologous nerves for the repair of long-segment peripheral nerve defects. In this study, we repaired a 40-mm ulnar nerve defect in rhesus monkeys with tissue-engineered peripheral nerve, and compared the outcome with that of autograft. The graft was prepared using a chemical extract from adult rhesus monkeys and seeded with allogeneic Schwann cells...
November 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/28118856/nirs-based-neurofeedback-training-in-a-virtual-reality-classroom-for-children-with-attention-deficit-hyperactivity-disorder-study-protocol-for-a-randomized-controlled-trial
#19
Friederike Blume, Justin Hudak, Thomas Dresler, Ann-Christine Ehlis, Jan Kühnhausen, Tobias J Renner, Caterina Gawrilow
BACKGROUND: Children with attention-deficit/hyperactivity disorder (ADHD) suffer from attention deficits, motor hyperactivity, and impulsive behaviour. These impairments are experienced at home, at school, and with friends. Functional imaging studies show that ADHD behaviour and impairments in executive functions (EFs) are mirrored by aberrant neurophysiological functioning. Moreover, several studies show that ADHD behaviour, impairments in EFs, and a lack of self-control contribute to poor school performance...
January 24, 2017: Trials
https://www.readbyqxmd.com/read/28118033/emergency-braking-is-affected-by-the-use-of-cruise-control
#20
Yves Jammes, Michel Behr, Maxime Llari, Sarah Bonicel, Jean Paul Weber, Stephane Berdah
OBJECTIVE: We compared the differences in the braking response to vehicle collision between an active human emergency braking (Control condition) and a cruise control (CC) or an adaptive cruise control (ACC). METHODS: In eleven male subjects, aged from 22 to 67 years, we measured the active emergency braking response during manual driving using the accelerator pedal (Control condition) or in condition mimicking a CC or ACC. In both conditions, we measured the brake reaction time (BRT), the delay to produce the peak braking force (PBD), the total emergency braking response (BRT + PBD), and the peak braking force (PBF)...
January 24, 2017: Traffic Injury Prevention
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