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https://www.readbyqxmd.com/read/29447545/effects-of-wearing-lower-leg-compression-sleeves-on-locomotion-economy
#1
Eduard Kurz, Christoph Anders
The purpose of this investigation was to assess the effect of compression sleeves on muscle activation cost during locomotion. Twenty-two recreationally active men (age: 25 ± 3 years) ran on a treadmill at four different speeds (ordered sequence of 2.8, 3.3, 2.2, and 3.9 m/s). The tests were performed without (control situation, CON) and while wearing specially designed lower leg compression sleeves (SL). Myoelectric activity of five lower leg muscles (tibialis anterior, fibularis longus, lateral and medial head of gastrocnemius, and soleus) was captured using Surface EMG...
February 15, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29447252/low-back-electromyography-emg-data-driven-load-classification-for-dynamic-lifting-tasks
#2
Deema Totah, Lauro Ojeda, Daniel D Johnson, Deanna Gates, Emily Mower Provost, Kira Barton
OBJECTIVE: Numerous devices have been designed to support the back during lifting tasks. To improve the utility of such devices, this research explores the use of preparatory muscle activity to classify muscle loading and initiate appropriate device activation. The goal of this study was to determine the earliest time window that enabled accurate load classification during a dynamic lifting task. METHODS: Nine subjects performed thirty symmetrical lifts, split evenly across three weight conditions (no-weight, 10-lbs and 24-lbs), while low-back muscle activity data was collected...
2018: PloS One
https://www.readbyqxmd.com/read/29444538/-effects-of-judo-specific-resistance-training-on-kinetic-and-electromyographic-parameters-of-pulling-exercises-in-judo-athletes
#3
Norman Helm, Olaf Prieske, Thomas Muehlbauer, Tom Krüger, Urs Granacher
BACKGROUND: In judo, rapid force production during pulling movements is an important component of athletic performance, which is why this capacity needs to be specifically exercised in judo. This study aimed at examining the effects of a judo-specific resistance training program using a judo ergometer system (PTJ) versus a traditional resistance training regime using a partner (PTP) on kinetics and muscle activity of judo-specific pulling exercises. METHOD: Twenty-four male judo athletes (age: 22 ± 4 years, training experience: 15 ± 3 years) were randomly assigned to two groups...
February 14, 2018: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/29426038/effect-of-short-term-training-on-fine-motor-control-in-trigeminally-innervated-versus-spinally-innervated-muscles
#4
Hong Zhang, Abhishek Kumar, Xiaoping Luo, Krister Svensson, Mats Trulsson, Peter Svensson
We hypothesized that the trigeminally innervated jaw muscles and spinally innervated hand muscles would differ in the force control and muscle activity when similar fine motor training tasks are performed. Sixteen healthy volunteers performed six series (with ten trials each) of an oral fine motor task (OFMT) and a hand fine motor task (HFMT), in random order. The task was to hold-and-break a test material (5 cm spaghetti pasta) placed on the force transducer between either their anterior teeth (OFMT) or the thumb and the index finger (HFMT)...
February 6, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29424937/pathogenesis-of-cranial-neuropathies-in-moebius-syndrome-electrodiagnostic-orofacial-studies
#5
Francis Renault, Roberto Flores-Guevara, Bernard Sergent, Jean Jacques Baudon, Jessie Aouizerate, Marie-Paule Vazquez, Cyril Gitiaux
INTRODUCTION: We designed a retrospective study of 59 patients with congenital sporadic non-progressive bilateral facial and abducens palsies. METHODS: Examinations included needle EMG of facial and oral muscles, facial nerve motor latency and conduction velocity (FNCV), and blink responses (BRs). RESULTS: Neurogenic EMG changes were found in one or more muscles in 55/59 patients, with no abnormal spontaneous activity. EMG changes were homogeneously neurogenic in 17 patients, homogeneously myopathic in one, and heterogeneous in 41/59 patients...
February 9, 2018: Muscle & Nerve
https://www.readbyqxmd.com/read/29423763/associations-between-practice-related-changes-in-motor-performance-and-muscle-activity-in-healthy-individuals-a-systematic-review
#6
REVIEW
Dennis Brueckner, Rainer Kiss, Thomas Muehlbauer
BACKGROUND: A well-learned motor skill is characterized by the efficient activation of muscles that are involved in movement execution. However, it is unclear if practice-related changes in motor performance correlate with those in quantitative markers of muscle activity and if so, whether the association is different with respect to the investigated muscle (i.e., agonist and antagonist) and quantitative myoelectric parameter. Thus, we conducted a systematic review and characterized associations between practice-related changes in motor performance and muscle activity in healthy individuals...
February 8, 2018: Sports Medicine—Open
https://www.readbyqxmd.com/read/29421350/long-term-evaluation-of-osteoarthritis-sheep-knee-treated-with-tgf-%C3%AE-3-and-bmp-6-induced-multipotent-stem-cells
#7
C C Ude, B S Shamsul, M H Ng, H C Chen, Htwe Ohnmar, S N Amaramalar, A R Rizal, A Johan, M Y Norhamdan, M Azizi, B S Aminuddin, B H I Ruszymah
BACKGROUND: Hyaline articular cartilage, which protects the bones of diarthrodial joints from forces associated with load bearing, frictions, and impacts has very limited capacities for self-repair. Over the years, the trend of treatments has shifted to regenerations and researchers have been on the quest for a lasting regeneration. We evaluated the treatment of osteoarthritis by chondrogenically induced ADSCs and BMSCs for a long time functional recovery. METHODS: Osteoarthritis was induced at the right knee of sheep by complete resection of ACL and medial meniscus...
January 29, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29417423/dysphagia-in-myasthenia-gravis-the-tip-of-the-iceberg
#8
Ebru Karaca Umay, Fatih Karaahmet, Eda Gurcay, Fatma Balli, Erhan Ozturk, Ozgur Karaahmet, Yasemin Eren, Tijen Ceylan
We evaluated swallowing function in patients with myasthenia gravis (MG) with or without dysphagia symptoms using different evaluation parameters and compared the results with those of healthy subjects. A total of 36 patients with MG and 25 healthy volunteers were included in the study. The subjects were classified into three groups; patients without dysphagia (group 1), patients with dysphagia (group 2), and healthy participants (group 3). The presence and severity of dysphagia, the oropharyngeal, pharyngeal, pharyngoesophageal, and esophageal phases were assessed using a screening test, manometric test, electrophysiologic studies [electroneuromyography (EMG)], fiberoptic endoscopic evaluation of swallowing (FEES), and barium swallow pharyngeal esophagography (BSPE), respectively...
February 7, 2018: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/29416514/intramuscular-pressure-of-tibialis-anterior-reflects-ankle-torque-but-does-not-follow-joint-angle-torque-relationship
#9
Filiz Ateş, Brenda L Davies, Swati Chopra, Krista Coleman-Wood, William J Litchy, Kenton R Kaufman
Intramuscular pressure (IMP) is the hydrostatic fluid pressure that is directly related to muscle force production. Electromechanical delay (EMD) provides a link between mechanical and electrophysiological quantities and IMP has potential to detect local electromechanical changes. The goal of this study was to assess the relationship of IMP with the mechanical and electrical characteristics of the tibialis anterior muscle (TA) activity at different ankle positions. We hypothesized that (1) the TA IMP and the surface EMG (sEMG) and fine-wire EMG (fwEMG) correlate to ankle joint torque, (2) the isometric force of TA increases at increased muscle lengths, which were imposed by a change in ankle angle and IMP follows the length-tension relationship characteristics, and (3) the electromechanical delay (EMD) is greater than the EMD of IMP during isometric contractions...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29412368/effects-of-orofacial-myofunctional-therapy-on-masticatory-function-in-individuals-submitted-to-orthognathic-surgery-a-randomized-trial
#10
Daniela Galvão de Almeida Prado, Giédre Berretin-Felix, Renata Resina Migliorucci, Mariana da Rocha Salles Bueno, Raquel Rodrigues Rosa, Marcela Polizel, Isadora Ferraz Teixeira, Maria Beatriz Duarte Gavião
OBJECTIVES: The esthetic and functional results of orthognathic surgery of severe dentofacial deformities are predictable, however there are differences regarding the effects on stomatognathic system. The aim was to investigate the effects of orofacial myofunctional therapy (OMT) on the masticatory function in individuals with dentofacial deformity submitted to orthognathic surgery (OGS). MATERIAL AND METHODS: Forty-eight individuals (18-40 years) were evaluated, 14 undergoing OMT (treated group-TG), 10 without this treatment (untreated group-UTG) and 24 in a control group with normal occlusion; for clinical aspects the data of an individual was missed (n=46)...
February 1, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29410738/effect-of-a-medicinal-plant-passiflora-incarnata-l-on-sleep
#11
Fructuoso Ayala Guerrero, Graciela Mexicano Medina
INTRODUCTION: Extracts of the plant Passiflora incarnata L. (Passifloraceae) were administered intraperitoneally in order to test its effects on sleep. METHOD: Experiments were carried out on chronically implanted male adult wistar rats to obtain cerebral (EEG), ocular (EOG) and muscular (EMG) activities throughout their states of vigilance. Polygraphic recordings were taken during 9 continuous hours before and after the extract administration (500 mg/kg). RESULTS: Passiflora incarnata induced a significant increment in the total sleep time (p<0...
July 2017: Sleep Science
https://www.readbyqxmd.com/read/29405175/assessment-of-dexterity-and-diagnostic-accuracy-of-the-functional-dexterity-test-in-patients-with-carpal-tunnel-syndrome
#12
Francesco Sartorio, Stefano Vercelli, Elisabetta Bravini, Anna Zanetta, Serena Bargeri, Fabrizio Pisano, Giorgio Ferriero
BACKGROUND: The diagnosis of carpal tunnel syndrome (STC) is centered on the symptoms. However, patients also show an impairment of sensorimotor functions, but the relationship between STC and manual dexterity has never been investigated. OBJECTIVES: To analyze the correlation between manual dexterity and severity of the STC. Another objective was the diagnostic accuracy of the clinical battery including provocative tests (Phalen, Tinel) and Functional Dexterity Test (FDT)...
February 1, 2018: La Medicina del Lavoro
https://www.readbyqxmd.com/read/29401195/effects-of-foam-rolling-on-range-of-motion-peak-torque-muscle-activation-and-the-hamstrings-to-quadriceps-strength-ratios
#13
Samantha N Madoni, Pablo B Costa, Jared W Coburn, Andrew J Galpin
PURPOSE: To examine the effects of foam rolling (FR), on range of motion, (ROM), peak torque (PT), hamstrings-to-quadriceps (H:Q) ratios, and muscle activation . METHODS: Twenty-two recreationally active women (mean age ± SD = 21.55 ± 1.82 years, 161.91 ± 6.58 cm, 61.47 ± 10.54 kg) volunteered for this study. Participants performed pre- and post-tests analyzing PT and surface electromyography (EMG) of their dominant limb completing maximal knee extension and flexion at three different velocities...
February 1, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29396017/numerical-validation-of-a-subject-specific-parameter-identification-approach-of-a-quadriceps-femoris-emg-driven-model
#14
Cláudio Bastos Heine, Luciano Luporini Menegaldo
Muscle models can be used to estimate muscle forces in motor tasks. Muscle model parameters can be estimated by optimizing cost functions based on error between measured and model-estimated joint torques. This paper is a numerical simulation study addressing whether this approach can accurately identify the parameters of the quadriceps femoris. The simulated identification task is a single joint maximum voluntary knee concentric-eccentric extension in an isokinetic dynamometer, keeping the hip fixed at a neutral position...
January 29, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29384451/comparison-of-speed-accuracy-tradeoff-between-linear-and-non-linear-filtering-algorithms-for-myocontrol
#15
Cassie Nguyen Borish, Adam Murray Feinman, Matteo Bertucco, Natalie G Ramsy, Terence David Sanger
Non-linear Bayesian filtering of surface electromyography (EMG) can provide a stable output signal with little delay and the ability to change rapidly, making it a potential control input for prosthetic or communication devices. We hypothesized that myocontrol follows Fitts' Law, and that Bayesian filtered EMG would improve movement times and success rates when compared with linearly filtered EMG. We tested the two filters using a Fitts' Law speed-accuracy paradigm in a one-muscle myocontrol task with EMG captured from the dominant first dorsal interosseous muscle...
January 31, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29382110/intraneural-platelet-rich-plasma-injections-for-the-treatment-of-radial-nerve-section-a-case-report
#16
Unai García de Cortázar, Sabino Padilla, Enrique Lobato, Diego Delgado, Mikel Sánchez
The radial nerve is the most frequently injured nerve in the upper extremity. Numerous options in treatment have been described for radial nerve injury, such as neurolysis, nerve grafts, or tendon transfers. Currently, new treatment options are arising, such as platelet-rich plasma (PRP), an autologous product with proved therapeutic effect for various musculoskeletal disorders. We hypothesized that this treatment is a promising alternative for this type of nerve pathology. The patient was a healthy 27-year-old man who suffered a deep and long cut in the distal anterolateral region of the right arm...
January 29, 2018: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29381748/common-neural-structures-activated-by-epidural-and-transcutaneous-lumbar-spinal-cord-stimulation-elicitation-of-posterior-root-muscle-reflexes
#17
Ursula S Hofstoetter, Brigitta Freundl, Heinrich Binder, Karen Minassian
Epidural electrical stimulation of the lumbar spinal cord is currently regaining momentum as a neuromodulation intervention in spinal cord injury (SCI) to modify dysregulated sensorimotor functions and augment residual motor capacity. There is ample evidence that it engages spinal circuits through the electrical stimulation of large-to-medium diameter afferent fibers within lumbar and upper sacral posterior roots. Recent pilot studies suggested that the surface electrode-based method of transcutaneous spinal cord stimulation (SCS) may produce similar neuromodulatory effects as caused by epidural SCS...
2018: PloS One
https://www.readbyqxmd.com/read/29379091/pisa-syndrome-in-parkinson-s-disease-pathogenic-roles-of-verticality-perception-deficits
#18
Young Eun Huh, Kunhyun Kim, Won-Ho Chung, Jinyoung Youn, Seonwoo Kim, Jin Whan Cho
We elucidated whether verticality misperception is associated with the generation of Pisa syndrome (PS) in patients with Parkinson's disease (PD). To examine the heterogenous influence of verticality perception, we also identified the characteristics distinguishing between PD patients with PS who tilted toward the deviation of perceived verticality and those who did not. Subjective visual vertical (SVV) testing was performed in 54 PD patients with PS and 36 without PS to measure verticality perception. Other potential risk factors for PS were evaluated by assessing the asymmetry of motor symptoms, EMG activities of paraspinal muscles, bithermal caloric tests, back pain history, and Berg Balance Scale...
January 29, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29358581/simple-and-cost-effective-method-of-highly-conductive-and-elastic-carbon-nanotube-polydimethylsiloxane-composite-for-wearable-electronics
#19
Jeong Hun Kim, Ji-Young Hwang, Ha Ryeon Hwang, Han Seop Kim, Joong Hoon Lee, Jae-Won Seo, Ueon Sang Shin, Sang-Hoon Lee
The development of various flexible and stretchable materials has attracted interest for promising applications in biomedical engineering and electronics industries. This interest in wearable electronics, stretchable circuits, and flexible displays has created a demand for stable, easily manufactured, and cheap materials. However, the construction of flexible and elastic electronics, on which commercial electronic components can be mounted through simple and cost-effective processing, remains challenging. We have developed a nanocomposite of carbon nanotubes (CNTs) and polydimethylsiloxane (PDMS) elastomer...
January 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29357515/the-noninvasive-simultaneous-measurement-of-tissue-oxygenation-and-microvascular-hemodynamics-during-incremental-handgrip-exercise
#20
Shane M Hammer, Andrew M Alexander, Kaylin D Didier, Joshua R Smith, Jacob Troy Caldwell, Shelbi L Sutterfield, Carl J Ade, Thomas J Barstow
Limb blood flow increases linearly with exercise intensity; however, invasive measurements of muscle microvascular blood flow during incremental exercise have demonstrated submaximal plateaus. We tested the hypotheses that 1) brachial artery blood flow (Q̇BA) would increase with increasing exercise intensity until task failure, 2) blood flow index of the flexor digitorum superficialis (BFIFDS) measured noninvasively via diffuse correlation spectroscopy (DCS) would plateau at a submaximal work rate, and 3) muscle oxygenation characteristics (total-[heme], deoxy-[heme], and % saturation) measured noninvasively with near-infrared spectroscopy (NIRS) would demonstrate a plateau at a similar work rate as BFIFDS...
December 14, 2017: Journal of Applied Physiology
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