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European Journal of Translational Myology

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https://www.readbyqxmd.com/read/27478576/editorial-ejtm-special-20-th-conference-of-the-international-functional-electrical-stimulation-society-ifess
#1
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No abstract text is available yet for this article.
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478575/evolution-of-surface-motor-activation-zones-in-hemiplegic-patients-during-20-sessions-of-fes-therapy-with-multi-pad-electrodes
#2
Jovana Malešević, Matija Štrbac, Milica Isaković, Vladimir Kojić, Ljubica Konstantinović, Aleksandra Vidaković, Suzana Dedijer, Miloš Kostić, Thierry Keller
The purpose of this study was to examine surface motor activation zones for wrist, fingers and thumb extension movements and their temporal change during 20 therapy sessions using advanced multi-pad functional electrical stimulation system. Results from four hemiplegic patients indicate that certain zones have higher probability of eliciting each of the target movements. However, mutual overlap and variations of the zones are present not just between the subjects, but also on the intrasubject level, reflected through these session to session transformations of the selected virtual electrodes...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478574/local-muscle-metabolic-demand-induced-by-neuromuscular-electrical-stimulation-and-voluntary-contractions-at-different-force-levels-a-nirs-study
#3
Makii Muthalib, Graham Kerr, Kazunori Nosaka, Stephane Perrey
Functional Muscle metabolic demand during contractions evoked by neuromuscular electrical stimulation (NMES) has been consistently documented to be greater than voluntary contractions (VOL) at the same force level (10-50% maximal voluntary contraction-MVC). However, we have shown using a near-infrared spectroscopy (NIRS) technique that local muscle metabolic demand is similar between NMES and VOL performed at MVC levels, thus controversy exists. This study therefore compared biceps brachii muscle metabolic demand (tissue oxygenation index-TOI and total hemoglobin volume-tHb) during a 10s isometric contraction of the elbow flexors between NMES (stimulation frequency of 30Hz and current level to evoke 30% MVC) and VOL at 30% MVC (VOL-30%MVC) and MVC (VOL-MVC) level in 8 healthy men (23-33-y)...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478573/a-study-on-the-effect-of-electrical-stimulation-as-a-user-stimuli-for-motor-imagery-classification-in-brain-machine-interface
#4
Saugat Bhattacharyya, Maureen Clerc, Mitsuhiro Hayashibe
Functional Electrical Stimulation (FES) provides a neuroprosthetic interface to non-recovered muscle groups by stimulating the affected region of the human body. FES in combination with Brain-machine interfacing (BMI) has a wide scope in rehabilitation because this system directly links the cerebral motor intention of the users with its corresponding peripheral muscle activations. In this paper, we examine the effect of FES on the electroencephalography (EEG) during motor imagery (left- and right-hand movement) training of the users...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478572/inductive-powering-of-subcutaneous-stimulators-key-parameters-and-their-impact-on-the-design-methodology
#5
Carmen Godfraind, Adrien Debelle, Laurent Lonys, Vicente Acuña, Pascal Doguet, Antoine Nonclercq
Inductive powering of implantable medical devices involves numerous factors acting on the system efficiency and safety in adversarial ways. This paper lightens up their role and identifies a procedure enabling the system design. The latter enables the problem to be decoupled into four principal steps: the frequency choice, the magnetic link optimization, the secondary circuit and then finally the primary circuit designs. The methodology has been tested for the powering system of a device requirering a power of 300mW and implanted at a distance of 15 to 30mm from the outside power source...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478571/exploring-selective-neural-electrical-stimulation-for-upper-limb-function-restoration
#6
Wafa Tigra, David Guiraud, David Andreu, Bertrand Coulet, Anthony Gelis, Charles Fattal, Pawel Maciejasz, Chloé Picq, Olivier Rossel, Jacques Teissier, Christine Azevedo Coste
This article introduces a new approach of selective neural electrical stimulation of the upper limb nerves. Median and radial nerves of individuals with tetraplegia are stimulated via a multipolar cuff electrode to elicit movements of wrist and hand in acute conditions during a surgical intervention. Various configurations corresponding to various combinations of a 12-poles cuff electrode contacts are tested. Video recording and electromyographic (EMG) signals recorded via sterile surface electrodes are used to evaluate the selectivity of each stimulation configuration in terms of activated muscles...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478570/an-intermediate-animal-model-of-spinal-cord-stimulation
#7
Thomas Guiho, Christine Azevedo Coste, Claire Delleci, Jean-Patrick Chenu, Jean-Rodolphe Vignes, Luc Bauchet, David Guiraud
Spinal cord injuries (SCI) result in the loss of movement and sensory feedback as well as organs dysfunctions. For example, nearly all SCI subjects loose their bladder control and are prone to kidney failure if they do not proceed to intermittent (self-) catheterization. Electrical stimulation of the sacral spinal roots with an implantable neuroprosthesis is a promising approach, with commercialized products, to restore continence and control micturition. However, many persons do not ask for this intervention since a surgical deafferentation is needed and the loss of sensory functions and reflexes become serious side effects of this procedure...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478569/engagement-sensitive-visual-stimulation
#8
Deepesh Kumar, Anirban Dutta, Abhijit Das, Uttama Lahiri
Stroke is one of leading cause of death and disability worldwide. Early detection during golden hour and treatment of individual neurological dysfunction in stroke using easy-to-access biomarkers based on a simple-to-use, cost-effective, clinically-valid screening tool can bring a paradigm shift in healthcare, both urban and rural. In our research we have designed a quantitative automatic home-based oculomotor assessment tool that can play an important complementary role in prognosis of neurological disorders like stroke for the neurologist...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478568/audio-visual-stimulation-in-conjunction-with-functional-electrical-stimulation-to-address-upper-limb-and-lower-limb-movement-disorder
#9
Deepesh Kumar, Sunny Verma, Sutapa Bhattacharya, Uttama Lahiri
Neurological disorders often manifest themselves in the form of movement deficit on the part of the patient. Conventional rehabilitation often used to address these deficits, though powerful are often monotonous in nature. Adequate audio-visual stimulation can prove to be motivational. In the research presented here we indicate the applicability of audio-visual stimulation to rehabilitation exercises to address at least some of the movement deficits for upper and lower limbs. Added to the audio-visual stimulation, we also use Functional Electrical Stimulation (FES)...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478567/a-new-semi-automatic-approach-to-find-suitable-virtual-electrodes-in-arrays-using-an-interpolation-strategy
#10
Christina Salchow, Markus Valtin, Thomas Seel, Thomas Schauer
Functional Electrical Stimulation via electrode arrays enables the user to form virtual electrodes (VEs) of dynamic shape, size, and position. We developed a feedback-control-assisted manual search strategy which allows the therapist to conveniently and continuously modify VEs to find a good stimulation area. This works for applications in which the desired movement consists of at least two degrees of freedom. The virtual electrode can be moved to arbitrary locations within the array, and each involved element is stimulated with an individual intensity...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478566/design-and-implementation-of-a-less-invasive-gastrostimulator
#11
Laurent Lonys, Anne Vanhoestenberghe, Vincent Huberty, Martin Hiernaux, Nicolas Cauche, Nicolas Julémont, Adrien Debelle, François Huberland, Vicente Acuña, Carmen Godfraind, Jacques Devière, Alain Delchambre, Pierre Mathys, Antoine Nonclercq
Gastrointestinal stimulator implants have recently shown positive results in helping obese patients lose weight. However, to place the implant, the patient currently needs to undergo an invasive surgical procedure. Our team is aiming for a less invasive procedure to stimulate the stomach with a gastrostimulator. Attempts covered fully endoscopic implantation and, more recently, we have focussed on a single incision laparoscopic procedure. Whatever the chosen implantation solution, the electronic design of the implant system shares many challenges...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478565/effects-of-sensitive-electrical-stimulation-based-cueing-in-parkinson-s-disease-a-preliminary-study
#12
Benoît Sijobert, Christine Azevedo-Coste, David Andreu, Claudia Verna, Christian Geny
This study aims to investigate the effect of a sensitive cueing on Freezing of Gait (FOG) and gait disorders in subjects suffering from Parkinson's disease (PD). 13 participants with Parkinson's disease were equipped with an electrical stimulator and a foot mounted inertial measurement unit (IMU). An IMU based algorithm triggered in real time an electrical stimulus applied on the arch of foot at heel off detection. Starting from standing, subjects were asked to walk at their preferred speed on a path comprising 5m straight, u-turn and walk around tasks...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478564/modeling-and-simulations-in-time-domain-of-a-stimulation-set-up-for-cortical-applications
#13
Michael Schweigmann, Frank Kirchhoff, Klaus P Koch
Electrical stimulation is used for example to treat neuronal disorders and depression with deep brain stimulation or transcranial electrical stimulation. Depending on the application, different electrodes are used and thus different electrical characteristics exist, which have to be handled by the stimulator. Without a measuring device the user would have to rely on the stimulator being able to deliver the needed stimulation signal. Therefore, the objective of this paper is to present a method to increase the level of confidence with characterization and modelling of the electrical behavior by using the example of one channel of our stimulation device for experimental use...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478563/comparison-of-proximally-versus-distally-placed-spatially-distributed-sequential-stimulation-electrodes-in-a-dynamic-knee-extension-task
#14
Marco Laubacher, Efe A Aksöz, Stuart Binder-Macleod, Kenneth J Hunt
Spatially distributed sequential stimulation (SDSS) has demonstrated substantial power output and fatigue benefits compared to single electrode stimulation (SES) in the application of functional electrical stimulation (FES). This asymmetric electrode setup brings new possibilities but also new questions since precise placement of the electrodes is one critical factor for good muscle activation. The aim of this study was to compare the power output, fatigue and activation properties of proximally versus distally placed SDSS electrodes in an isokinetic knee extension task simulating knee movement during recumbent cycling...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478562/quantitative-computed-tomography-and-image-analysis-for-advanced-muscle-assessment
#15
Kyle Joseph Edmunds, Magnus K Gíslason, Iris D Arnadottir, Andrea Marcante, Francesco Piccione, Paolo Gargiulo
Medical imaging is of particular interest in the field of translational myology, as extant literature describes the utilization of a wide variety of techniques to non-invasively recapitulate and quantity various internal and external tissue morphologies. In the clinical context, medical imaging remains a vital tool for diagnostics and investigative assessment. This review outlines the results from several investigations on the use of computed tomography (CT) and image analysis techniques to assess muscle conditions and degenerative process due to aging or pathological conditions...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478561/serum-response-factor-in-muscle-tissues-from-development-to-ageing
#16
Dario Coletti, Nissrine Daou, Medhi Hassani, Zhenlin Li, Ara Parlakian
Skeletal, cardiac and smooth muscle cells share various common characteristic features. During development the embryonic mesodermal layer contribute at different proportions to the formation of these tissues. At the functional level, contractility as well as its decline during ageing, are also common features. Cytoskeletal components of these tissues are characterized by various actin isoforms that govern through their status (polymerised versus monomeric) and their interaction with the myosins the contractile properties of these muscles...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478560/physical-activity-counteracts-tumor-cell-growth-in-colon-carcinoma-c26-injected-muscles-an-interim-report
#17
Charlotte Hiroux, Tijs Vandoorne, Katrien Koppo, Stefan De Smet, Peter Hespel, Emanuele Berardi
Skeletal muscle tissue is a rare site of tumor metastasis but is the main target of the degenerative processes occurring in cancer-associated cachexia syndrome. Beneficial effects of physical activity in counteracting cancer-related muscle wasting have been described in the last decades. Recently it has been shown that, in tumor xeno-transplanted mouse models, physical activity is able to directly affect tumor growth by modulating inflammatory responses in the tumor mass microenvironment. Here, we investigated the effect of physical activity on tumor cell growth in colon carcinoma C26 cells injected tibialis anterior muscles of BALB/c mice...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478559/severely-atrophic-human-muscle-fibers-with-nuclear-misplacement-survive-many-years-of-permanent-denervation
#18
Ugo Carraro, Helmut Kern
Likewise in rodents, after complete spinal cord injury (SCI) the lower motor neuron (LMN) denervated human muscle fibers lose completely the myofibrillar apparatus and the coil distribution of myonuclei that are relocated in groups (nuclear clumps) in the center of severely atrophic muscle fibers. Up to two years of LMN denervation the muscle fibers with nuclear clumps are very seldom, but in this cohort of patients the severely atrophic muscle fibers are frequent in muscle biopsies harvested three to six years after SCI...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478558/extensive-functional-evaluations-to-monitor-aerobic-training-in-becker-muscular-dystrophy-a-case-report
#19
Caterina Tramonti, Bruno Rossi, Carmelo Chisari
Low-intensity aerobic training seems to have positive effects on muscle strength, endurance and fatigue in Becker Muscular Dystrophy (BMD) patients. We describe the case of a 33-year old BMD man, who performed a four-week aerobic training. Extensive functional evaluations were executed to monitor the efficacy of the rehabilitative treatment. Results evidenced an increased force exertion and an improvement in muscle contraction during sustained exercise. An improvement of walk velocity, together with agility, endurance capacity and oxygen consumption during exercise was observed...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27478557/observation-of-network-dynamics-of-ryanodine-receptors-on-skeletal-muscle-sarcoplasmic-reticulum-membranes
#20
Hongli Hu, Xing Meng
Rabbit muscle vesicles derived from sarcoplasmic reticulum were used as a material in studying networks of ryanodine receptors by cryo electron tomography. Three-dimensional analysis reveals the dynamical features of these networks. It was found that the connection angles were rotated along the transmembrane axis of ryanodine receptors. Majority of the connections was observed at domains 6/6 of ryanodine receptors while a small group of connections were showed at domains 9/10. The flexible rotation and connection shift seem to facilitate the extension of an annular network on the wall of the sarcoplasmic reticulum in a triad...
June 13, 2016: European Journal of Translational Myology
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