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Neuromuscular control

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https://www.readbyqxmd.com/read/28319133/effects-of-sudden-walking-perturbations-on-neuromuscular-reflex-activity-and-three-dimensional-motion-of-the-trunk-in-healthy-controls-and-back-pain-symptomatic-subjects
#1
Juliane Mueller, Tilman Engel, Steffen Mueller, Josefine Stoll, Heiner Baur, Frank Mayer
BACKGROUND: Back pain patients (BPP) show delayed muscle onset, increased co-contractions, and variability as response to quasi-static sudden trunk loading in comparison to healthy controls (H). However, it is unclear whether these results can validly be transferred to suddenly applied walking perturbations, an automated but more functional and complex movement pattern. There is an evident need to develop research-based strategies for the rehabilitation of back pain. Therefore, the investigation of differences in trunk stability between H and BPP in functional movements is of primary interest in order to define suitable intervention regimes...
2017: PloS One
https://www.readbyqxmd.com/read/28315283/effect-of-swallowing-rehabilitation-protocol-on-swallowing-function-in-patients-with-esophageal-atresia-and-or-tracheoesophageal-fistula
#2
Selen Serel Arslan, Tutku Soyer, Numan Demir, Sule Yalcın, Ayşe Karaduman, Ibrahim Karnak, Feridun Cahit Tanyel
Aim The aim of this study was to evaluate the results of Swallowing Rehabilitation Protocol (SRP) on swallowing function (SF) of esophageal atresia and tracheoesophageal fistula (EA-TEF) patients with pharyngeal swallowing disorder. Materials and Methods In this study, 24 children with EA-TEF who had deglutitive and respiratory problems were grouped into either study (n = 12) or control group (n = 12) by basic randomization. Study group received the SRP including neuromuscular electrical stimulation, thermal tactile stimulation, and hyolaryngeal mobilization...
March 17, 2017: European Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28314519/after-effects-of-peripheral-neurostimulation-on-brain-plasticity-and-ankle-function-in-chronic-stroke-the-role-of-afferents-recruited
#3
Louis-David Beaulieu, Hugo Massé-Alarie, Samuel Camiré-Bernier, Édith Ribot-Ciscar, Cyril Schneider
AIMS OF THE STUDY: This study tested the after-effects of neuromuscular electrical stimulation (NMES), repetitive peripheral magnetic stimulation (rPMS) and muscle tendon vibration (VIB) on brain plasticity and sensorimotor impairments in chronic stroke to investigate whether different results could depend on the nature of afferents recruited by each technique. MATERIALS AND METHODS: Fifteen people with chronic stroke participated in five sessions (one per week)...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28294705/number-of-knee-and-ankle-injuries-is-associated-with-poor-physical-but-not-mental-health
#4
Casey M Bruce, Phillip A Gribble, Michael J Turner, Tricia Hubbard-Turner, Janet E Simon, Abbey C Thomas
The knee and ankle are among the most commonly injured joints in the body. Long-term strength and neuromuscular control deficits are common following these injuries, yielding lifelong disability and poor quality of life. However, it is unknown how the number of injuries sustained influences quality of life. OBJECTIVES: Determine the association between the number of ankle or knee injuries sustained and physical and mental quality of life. METHODS: A total of 806 ankle-injured (age:45...
March 15, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28285381/the-impact-of-type-1-diabetes-and-diabetic-polyneuropathy-on-muscle-strength-and-fatigability
#5
Giorgio Orlando, Stefano Balducci, Ilenia Bazzucchi, Giuseppe Pugliese, Massimo Sacchetti
AIMS: Although it is widely accepted that diabetic polyneuropathy (DPN) is linked to a marked decline in neuromuscular performance, information on the possible impact of type 1 diabetes (T1D) on muscle strength and fatigue remains unclear. The purpose of this study was to investigate the effects of T1D and DPN on strength and fatigability in knee extensor muscles. METHODS: Thirty-one T1D patients (T1D), 22 T1D patients with DPN (DPN) and 23 matched healthy control participants (C) were enrolled...
March 11, 2017: Acta Diabetologica
https://www.readbyqxmd.com/read/28284335/oxidative-modifications-of-blood-serum-proteins-in-myasthenia-gravis
#6
Monika Adamczyk-Sowa, Edyta Bieszczad-Bedrejczuk, Sabina Galiniak, Izabela Rozmiłowska, Damian Czyżewski, Grzegorz Bartosz, Izabela Sadowska-Bartosz
Myasthenia gravis (MG) is an autoimmune disease caused by production of antibodies against acetylcholine receptors of the neuromuscular junction (Ab). The aim of this study was to ascertain if oxidative stress accompanies MG by estimation of the several independent parameters of oxidative damage, mainly the levels of oxidative modifications of blood serum proteins. The group studied consisted of 50 MG patients (28 females and 22 males), 24 with ocular MG (OMG) and 26 with generalized MG (GMG), of mean age of 66...
April 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28284237/interpreting-pain-symptoms-and-how-pain-affects-neuromuscular-control-in-dancersif-i-m-in-pain-how-should-i-train
#7
Andrew P Claus, David A Macdonald
This review draws from leading research on pain neuroscience and control of posture and movement to help inform rehabilitation approaches and when it may or may not be prudent to "dance through" pain. Control of posture and movement is frequently distorted by pain perception, and that may not be altered even when the pain is resolved. It is important to exclude serious systemic disease or major tissue injury with severe, unremitting, or persistent symptoms before focusing on movement-based rehabilitation. Both specific exercises (contraction of specific muscles and use of movement techniques) and general exercises (which promote strength, power, endurance, and flexibility) can help to manage individuals with persistent pain problems...
March 1, 2017: Journal of Dance Medicine & Science
https://www.readbyqxmd.com/read/28282755/the-acute-effects-of-an-intense-stretch-shortening-cycle-fatigue-protocol-on-the-neuromechanical-parameters-of-lower-limbs-in-men-and-prepubescent-boys
#8
Savvas Lazaridis, Dimitrios A Patikas, Eleni Bassa, Themistoklis Tsatalas, Konstantinos Hatzikotoulas, Christos Ftikas, Christos Kotzamanidis
The study examined the differences between boys and adults after an intense stretch-shortening cycle fatigue protocol on neuromechanical parameters of the lower limb. Thirteen boys (9-11 years old) and 13 adult men (22-28 years old) were tested for maximal isometric voluntary knee extension torque and drop jump (DJ) performance from 30 cm before and immediately after a fatigue protocol, consisted of 10 × 10 maximum effort vertical jumps. Three-dimensional kinematics, kinetics and electromyographic (EMG) parameters of the lower extremities muscles were recorded during DJs before and after the fatigue test...
February 8, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28281681/chemogenetic-stimulation-of-the-hypoglossal-neurons-improves-upper-airway-patency
#9
Thomaz Fleury Curado, Kenneth Fishbein, Huy Pho, Michael Brennick, Olga Dergacheva, Luiz U Sennes, Luu V Pham, Ellen E Ladenheim, Richard Spencer, David Mendelowitz, Alan R Schwartz, Vsevolod Y Polotsky
Obstructive sleep apnea (OSA) is characterized by recurrent upper airway obstruction during sleep. OSA leads to high cardiovascular morbidity and mortality. The pathogenesis of OSA has been linked to a defect in neuromuscular control of the pharynx. There is no effective pharmacotherapy for OSA. The objective of this study was to determine whether upper airway patency can be improved using chemogenetic approach by deploying designer receptors exclusively activated by designer drug (DREADD) in the hypoglossal motorneurons...
March 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28274922/membrane-lipid-rafts-disturbance-in-the-response-of-rat-skeletal-muscle-to-short-term-disuse
#10
Alexey M Petrov, Violetta V Kravtsova, Vladimir V Matchkov, Alexander N Vasiliev, Andrey L Zefirov, Alexander V Chibalin, Judith A Heiny, Igor I Krivoi
Marked loss of skeletal muscle mass occurs under various conditions of disuse, but the molecular and cellular mechanisms leading to atrophy are not completely understood. We investigate early molecular events which might play a role in skeletal muscle remodeling during mechanical unloading (disuse). The effects of acute (6 - 12 h) hindlimb suspension on the soleus muscles from adult rats were examined. The integrity of plasma membrane lipid rafts was tested utilizing cholera toxin B subunit, or fluorescent sterols...
March 8, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28270752/neuronal-correlates-of-functional-coupling-between-reach-and-grasp-related-components-of-muscle-activity
#11
Shashwati Geed, Martha L McCurdy, Peter L E van Kan
Coordinated reach-to-grasp movements require precise spatiotemporal synchrony between proximal forelimb muscles (shoulder, elbow) that transport the hand toward a target during reach, and distal muscles (wrist, digit) that simultaneously preshape and orient the hand for grasp. The precise mechanisms through which the redundant neuromuscular circuitry coordinates reach with grasp, however, remain unclear. Recently, Geed and Van Kan (2016) demonstrated, using exploratory factor analysis (EFA), that limited numbers of global, template-like transport/preshape- and grasp-related muscle components underlie the complexity and variability of intramuscular electromyograms (EMGs) of up to 21 distal and proximal muscles recorded while monkeys performed reach-to-grasp tasks...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28270167/sedation-and-analgesia-practices-at-italian-neonatal-intensive-care-units-results-from-the-europain-study
#12
Paola Lago, Anna Chiara Frigo, Eugenio Baraldi, Roberta Pozzato, Emilie Courtois, Jérôme Rambaud, Kanwaljeet J S Anand, Ricardo Carbajal
BACKGROUND: We aimed to examine current bedside analgesia/sedation (A/S) and pain assessment (PA) practices in Italian neonatal intensive care units (NICUs) in relation to the findings of an epidemiological European study and recently-introduced national guidelines. METHODS: We analyzed the Italian data from the EUROPAIN (EUROpean-Pain-Audit-In-Neonates) prospective observational study on A/S practices that involved 6680 newborns admitted to tertiary-level NICUs in 18 European countries...
March 7, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28269818/a-two-dimensional-matrix-image-based-feature-extraction-method-for-classification-of-semg-a-comparative-analysis-based-on-svm-knn-and-rbf-nn
#13
Tingxi Wen, Zhongnan Zhang, Ming Qiu, Ming Zeng, Weizhen Luo
BACKGROUND: The computer mouse is an important human-computer interaction device. But patients with physical finger disability are unable to operate this device. Surface EMG (sEMG) can be monitored by electrodes on the skin surface and is a reflection of the neuromuscular activities. Therefore, we can control limbs auxiliary equipment by utilizing sEMG classification in order to help the physically disabled patients to operate the mouse. OBJECTIVE: To develop a new a method to extract sEMG generated by finger motion and apply novel features to classify sEMG...
March 3, 2017: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/28269791/measuring-habitual-physical-activity-in%C3%A2-neuromuscular-disorders-a-systematic-review
#14
Aura Cecilia Jimenez-Moreno, Jane Newman, Sarah J Charman, Michael Catt, Michael I Trenell, Grainne S Gorman, Jean-Yves Hogrel, Hanns Lochmüller
BACKGROUND: Free-living or habitual physical activity (HPA) refers to someone's performance in his or her free-living environment. Neuromuscular disorders (NMD) manifest through HPA, and the observation of HPA can be used to identify clinical risks and to quantify outcomes in research. This review summarizes and analyses previous studies reporting the assessment of HPA in NMD, and may serve as the basis for evidence-based decision-making when considering assessing HPA in this population...
2017: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/28269706/a-stimulation-driven-exoskeleton-for-walking-after-paraplegia
#15
Sarah R Chang, Mark J Nandor, Lu Li, Kevin M Foglyano, John R Schnellenberger, Rudi Kobetic, Roger D Quinn, Ronald J Triolo
An untethered version of a stimulation-driven exoskeleton was evaluated for its ability to restore walking after paralysis from spinal cord injury. The hybrid neuroprosthesis (HNP) combined a passive variable-constraint exoskeleton for stability and support with functional neuromuscular stimulation (FNS) to contract the paralyzed muscles to drive limb movement. This self-contained HNP was operated by an onboard controller that sampled sensor signals, generated appropriate commands to both the exoskeletal constraints and integrated stimulator, and transmitted data wirelessly via Bluetooth to an off-board computer for real-time monitoring and recording for offline analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269496/the-correlation-between-transcranial-magnetic-stimulation-parameters-and-neuromuscular-properties-in-children-with-cerebral-palsy
#16
H Marzbani, Sh Parvin, S Amiri, M Lotfian, M R Kharazi, Sh Azizi, M M Mirbagheri
We studied the correlation between corticospinal signaling and neuromuscular properties in children with Cerebral Palsy (CP). Corticospinal signaling was evaluated using Transcranial Magnetic Stimulation (TMS). Neuromuscular properties were quantified using Hoffmann reflex (H-reflex), sonoelastography, clinical measurements, and isokinetic measures. In particular, we determined the relationship between the TMS parameters of the ankle joint and the neuromuscular features of ankle extensors and flexors as well as popular clinical measures of gait speed, endurance, balance and mobility...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268893/applicability-of-ssvep-based-brain-computer-interfaces-for-robot-navigation-in-real-environments
#17
Christina Farmaki, Georgios Christodoulakis, Vangelis Sakkalis
Brain-computer interfaces have been extensively studied and used in order to aid patients suffering from neuromuscular diseases to communicate and control the surrounding environment. Steady-state visual evoked potentials (SSVEP) constitute a very popular BCI stimulation protocol, due to their efficiency and quick response time. In this study, we developed a SSVEP-based BCI along with a low-cost custom radio-controlled robot-car providing live video feedback from a wireless camera mounted on the robot, serving as our testbed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268751/model-based-assistance-as-needed-for-robotic-movement-therapy-after-stroke
#18
Hossein Taheri, David J Reinkensmeyer, Eric T Wolbrecht
This paper extends an adaptive control approach for robotic movement therapy that learns deficiencies in a patient's neuromuscular output and assists accordingly. In this method, adaptation is based on trajectory tracking error and a model of unimpaired motor control forces. The controller presented here adaptively learns and fills the gaps in the patient's ability to generate inertial forces, instead of just static forces, as has been proposed before. To test this method, a two dimensional model of an impaired human arm was used to simulate reaching movements in the horizontal plane...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268468/detection-of-myasthenia-gravis-using-electrooculography-signals
#19
T Liang, M I Boulos, B J Murray, S Krishnan, H Katzberg, K Umapathy
Myasthenia gravis (MG) is an autoimmune neuromuscular disorder resulting from skeletal muscle weakness and fatigue. An early common symptom is fatigable weakness of the extrinsic ocular muscles; if symptoms remain confined to the ocular muscles after a few years, this is classified as ocular myasthenia gravis (OMG). Diagnosis of MG when there are mild, isolated ocular symptoms can be difficult, and currently available diagnostic techniques are insensitive, non-specific or technically cumbersome. In addition, there are no accurate biomarkers to follow severity of ocular dysfunction in MG over time...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268266/simple-emg-driven-musculoskeletal-model-enables-consistent-control-performance-during-path-tracing-tasks
#20
Dustin Crouch, He Huang
Consistent, robust performance is critical for the utility and user-acceptance of neurally-controlled powered upper limb prostheses. We preliminarily evaluated the performance consistency of an electromyography (EMG)-driven controller based on a two degree-of-freedom musculoskeletal hand model, whose simplified structure is more practical for real-time prosthesis control than existing, complex models. Parameters of four virtual muscles were computed by numerical optimization from an able-bodied subject's kinematic and EMG data collected during wrist and metacarpophalangeal (MCP) flexion/extension movements...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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