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Functional electric stimulation

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https://www.readbyqxmd.com/read/28107684/non-invasive-brain-stimulation-targeting-the-right-fusiform-gyrus-selectively-increases-working-memory-for-faces
#1
Tad T Brunyé, Joseph M Moran, Amanda Holmes, Caroline R Mahoney, Holly A Taylor
The human extrastriate cortex contains a region critically involved in face detection and memory, the right fusiform gyrus. The present study evaluated whether transcranial direct current stimulation (tDCS) targeting this anatomical region would selectively influence memory for faces versus non-face objects (houses). Anodal tDCS targeted the right fusiform gyrus (Brodmann's Area 37), with the anode at electrode site PO10, and cathode at FP2. Two stimulation conditions were compared in a repeated-measures design: 0...
January 17, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28104438/safety-of-externally-stimulated-intracranial-electrodes-during-functional-mri-at-1-5t
#2
Pallab K Bhattacharyya, Jeffery Mullin, Bryan S Lee, Jorge A Gonzalez-Martinez, Stephen E Jones
Surgical resection of the epileptogenic zone (EZ) is a potential cure for medically refractory focal epilepsy. Proper identification of the EZ is essential for such resection. Synergistic application of functional magnetic resonance imaging (fMRI) simultaneously with stimulation of a single externalized intracranial stereotactic EEG (SEEG) electrode has the potential to improve identification of the EZ. While most EEG-fMRI studies use the electrodes passively to record electrical activity, it is possible to stimulate the brain using the electrodes by connecting them with conducting cables to the stimulation hardware...
January 16, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28104245/assessing-kinematics-and-kinetics-of-functional-electrical-stimulation-rowing
#3
Adina E Draghici, Glen Picard, J Andrew Taylor, Sandra J Shefelbine
Hybrid functional electrical stimulation (FES) rowing has positive effects on cardiovascular fitness, producing significantly greater aerobic power than either upper body or FES exercise alone. However, there is minimal information on the kinematics, kinetics, and mechanical efficiency of FES-rowing in the spinal cord injured (SCI) population. This study examined the biomechanics of FES-rowing to determine how motions, forces, and aerobic demand change with increasing intensity. Six individuals with SCI and six able-bodied subjects performed a progressive aerobic capacity rowing test...
January 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28102429/training-and-orthotic-effects-related-to-functional-electrical-stimulation-of-the-peroneal-nerve-in-stroke
#4
Tamsyn Street, Ian Swain, Paul Taylor
OBJECTIVE: To examine the evidence for a training effect on the lower limb of functional electrical stimulation. DESIGN: Cohort study. PATIENTS: A total of 133 patients >6 months post-stroke. METHODS: Training and orthotic effects were determined from walking speed over 10 m, associated minimal and substantial clinically important differences (i.e. >0.05 and >0.10 m/s), and Functional Ambulation Category (FAC), ranging from household walking to independent walking in the community...
January 18, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28100728/direct-cortical-stimulation-of-human-posteromedial-cortex
#5
Brett L Foster, Josef Parvizi
BACKGROUND: The posteromedial cortex (PMC) is a collective term for an anatomically heterogeneous area of the brain constituting a core node of the human default mode network (DMN), which is engaged during internally focused subjective cognition such as autobiographical memory. METHODS: We explored the effects of causal perturbations of PMC with direct electric brain stimulation (EBS) during presurgical epilepsy monitoring with intracranial EEG electrodes. RESULTS: Data were collected from 885 stimulations in 25 patients implanted with intracranial electrodes across the PMC...
January 18, 2017: Neurology
https://www.readbyqxmd.com/read/28099194/chronic-resistance-training-does-not-ameliorate-unloading-induced-decrements-in-neuromuscular-function
#6
Michael R Deschenes, Raymond W McCoy, Katherine A Mangis
OBJECTIVE: The aim of this study was to assess the efficacy of long-term resistance training in preventing the detrimental effects of muscle unloading on neuromuscular function. DESIGN: Eleven untrained men and 11 men with extensive backgrounds in resistance training were tested for several parameters of neuromuscular function at various isokinetic contractile velocities before and after 7 days of muscle unloading. Measurements included muscle mass, strength, power, total work, electromyography, and neuromuscular transmission efficiency using superimposed electrical stimulation of maximally contracting muscles...
January 17, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28093928/functional-electrical-stimulation-therapy-for-severe-hemiplegia-randomized-control-trial-revisited
#7
Cesar Marquez-Chin, Shaghayegh Bagher, Vera Zivanovic, Milos R Popovic
BACKGROUND: Stroke is the leading cause of long-term disability. Stroke survivors seldom improve their upper-limb function when their deficit is severe, despite recently developed therapies. PURPOSE: This study aims to assess the efficacy of functional electrical stimulation therapy in improving voluntary reaching and grasping after severe hemiplegia. METHOD: A post hoc analysis of a previously completed randomized control trial ( clinicaltrials...
January 1, 2017: Canadian Journal of Occupational Therapy. Revue Canadienne D'ergothérapie
https://www.readbyqxmd.com/read/28093194/effects-of-neuromuscular-electrical-stimulation-during-hemodialysis-on-peripheral-muscle-strength-and-exercise-capacity-a-randomized-clinical-trial
#8
Ana Karla Vieira Brüggemann, Carolina Luana Mello, Tarcila Dal Pont, Deborah de Camargo Hizume Kunzler, Daniel Fernandes Martins, Franciane Bobinski, Wellington Pereira Yamaguti, Elaine Paulin
OBJECTIVE: To evaluate the effects of neuromuscular electrical stimulation of high and low frequency and intensity, performed during hemodialysis (HD), on physical function and inflammation markers in patients with chronic kidney disease (CKD). DESIGN: Randomized clinical trial SETTING: Hemodialysis clinic. PARTICIPANTS: 51 CKD patients were randomized into blocks of four by means of opaque envelopes. They were divided into a group of high frequency and intensity neuromuscular electrical stimulation (HG) and a group of low frequency and intensity neuromuscular electrical stimulation (LG)...
January 13, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28088382/functional-electrical-stimulation-for-foot-drop-in-multiple-sclerosis-a-systematic-review-and-meta-analysis-of-the-impact-on-gait-speed
#9
REVIEW
Linda Miller, Angus McFadyen, Anna C Lord, Rebecca Hunter, Lorna Paul, Danny Rafferty, Roy Bowers, Paul Mattison
OBJECTIVE: To review the efficacy of functional electrical stimulation (FES) used for foot drop in people with multiple sclerosis (pwMS) on gait speed in short and long walking performance tests. DATA SOURCES: Five databases (Cochrane Library, CINAHL, Embase, MEDLINE, Pubmed) and reference lists were searched. STUDY SELECTION: Studies of both observational and experimental design where gait speed data in pwMS could be extracted were included...
January 11, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28087519/sympathetic-modulation-of-electrical-activation-in-normal-and-infarcted-myocardium-implications-for-arrhythmogenesis
#10
Olujimi A Ajijola, Robert L Lux, Anadjeet Khahera, OhJin Kwon, Eric Aliotta, Daniel Ennis, Michael C Fishbein, Jeffrey Laurence Ardell, Kalyanam Shivkumar
: Background The influence of cardiac sympathetic innervation on electrical activation in normal and chronically infarcted ventricular myocardium is not understood. Methods and Results Yorkshire pigs with normal hearts (NL, n=12) or anterior myocardial infarction (MI, n=9) underwent high-resolution mapping of the anteroapical left ventricle, at baseline, and during left and right stellate ganglion stimulation (LSGS & RSGS, respectively). Conduction velocity (CV), activation times (AT), & directionality of propagation were measured...
January 13, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28087265/myocardial-relaxation-is-accelerated-by-fast-stretch-not-reduced-afterload
#11
Charles S Chung, Charles W Hoopes, Kenneth S Campbell
Fast relaxation of cross-bridge generated force in the myocardium facilitates efficient diastolic function. Recently published research studying mechanisms that modulate the relaxation rate has focused on molecular factors. Mechanical factors have received less attention since the 1980s when seminal work established the theory that reducing afterload accelerates the relaxation rate. Clinical trials using afterload reducing drugs, partially based on this theory, have thus far failed to improve outcomes for patients with diastolic dysfunction...
January 11, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28079995/effects-of-cell-cycle-phases-on-the-induction-of-dental-pulp-stem-cells-toward-dopaminergic-like-cells
#12
Nareshwaran Gnanasegaran, Vijayendran Govindasamy, Premasangery Kathirvaloo, Sabri Musa, Noor Hayaty Abu Kasim
Parkinson's disease (PD) is characterized by tremors and cognitive issues, and is due to the death of dopaminergic (DA-ergic) neurons in brain circuits that are responsible for producing neurotransmitter dopamine (DA). Currently, cell replacement therapies are underway to overcome existing therapeutic approaches such as drug treatments and electrical stimulation. Among the widely available sources, dental pulp stem cells from deciduous teeth (DPSC) have gained popularity due to their neural crest origin and inherent propensity toward neuronal lineage...
January 12, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28079471/pre-implant-modeling-of-depth-lead-placement-in-white-matter-for-maximizing-the-extent-of-cortical-activation-during-direct-neurostimulation-therapy
#13
Leopoldo Cendejas Zaragoza, Richard W Byrne, Marvin A Rossi
INTRODUCTION: The objective of this work was to predict preoperatively the maximum extent to which direct stimulation therapy can propagate through an epileptic circuit for stabilizing refractory focal-onset epilepsy. A pre-surgical workflow is presented which comprises a computationally intensive process for calculating the volume of cortical activation (VOCA) surrounding cylindrical depth contacts virtually placed in white matter. The process employs an activation function (AF) derived from cable modeling of an axon...
January 12, 2017: Neurological Research
https://www.readbyqxmd.com/read/28079427/effect-of-functional-electrical-stimulation-on-cardiovascular-outcomes-in-patients-with-chronic-heart-failure
#14
Nikolaos Pe Kadoglou, Christina Mandila, Apostolos Karavidas, Dimitrios Farmakis, Vasiliki Matzaraki, Christos Varounis, Sofia Arapi, Anastasia Perpinia, John Parissis
Background/design Functional electrical stimulation of lower limb muscles is an alternative method of training in patients with chronic heart failure (CHF). Although it improves exercise capacity in CHF, we performed a randomised, placebo-controlled study to investigate its effects on long-term clinical outcomes. Methods We randomly assigned 120 patients, aged 71 ± 8 years, with stable CHF (New York Heart Association (NYHA) class II/III (63%/37%), mean left ventricular ejection fraction 28 ± 5%), to either a 6-week functional electrical stimulation training programme or placebo...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28079057/functional-mri-of-the-reserpine-induced-putative-rat-model-of-fibromyalgia-reveals-discriminatory-patterns-of-functional-augmentation-to-acute-nociceptive-stimuli
#15
Jack A Wells, Sayaka Shibata, Akihiko Fujikawa, Masayasu Takahashi, Tsuneo Saga, Ichio Aoki
Functional neuroimaging, applied to pre-clinical models of chronic pain, offers unique advantages in the drive to discover new treatments for this prevalent and oppressive condition. The high spatial and temporal resolution of fMRI affords detailed mapping of regional pharmacodynamics that underlie mechanisms of pain suppression by new analgesics. Despite evidence supporting the translational relevance of this approach, relatively few studies have investigated fMRI abnormalities in rodent models of chronic pain...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078074/fes-in-europe-and-beyond-current-translational-research
#16
Christine Azevedo Coste, Winfried Mayr, Manfred Bijak, Antonio Musarò, Ugo Carraro
Capacity of adult neural and muscle tissues to respond to external Electrical Stimulation (ES) is the biological basis for the development and implementation of mobility impairment physiotherapy protocols and of related assistive technologies, e.g, Functional Electrical Stimulation (FES). All body tissues, however, respond to electrical stimulation and, indeed, the most successful application of FES is electrical stimulation of the heart to revert or limit effects of arrhythmias (Pace-makers and Defibrillators)...
September 15, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28078072/multisensor-classification-system-for-triggering-fes-in-order-to-support-voluntary-swallowing
#17
Benjamin Riebold, Holger Nahrstaedt, Corinna Schultheiss, Rainer O Seidl, Thomas Schauer
In dysphagia the ability of elevating the larynx and hyoid is usually impaired. Electromyography (EMG) and Bioimpedance (BI) measurements at the neck can be used to trigger functional electrical stimulation (FES) of swallowing related muscles. Nahrstaedt et al.(1) introduced an algorithm to trigger the stimulation in phase with the voluntary swallowing to improve the airway closure and elevation speed of the larynx and hyoid. However, due to non-swallow related movements like speaking, chewing or head turning, stimulations might be unintentionally triggered...
September 15, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28078071/electrical-stimulation-to-reduce-the-overload-in-upper-limbs-during-sitting-pivot-transfer-in-paraplegic-a-preliminary-study
#18
Ana Claudia G Lopes, Claudia Ochoa-Diaz, Roberto S Baptista, Lucas O Fonseca, Charles Fattal, Christine Azevedo Coste, Antônio P L Bó, Emerson Fachin-Martins
Transfer is a key ability and allows greater interact with the environment and social participation. Conversely, paraplegics have great risk of pain and injury in the upper limbs due to joint overloads during activities of daily living, like transfer. The main goal of this study is to verify if the use of functional electrical stimulation (FES) in the lower limbs of paraplegic individuals can assist the sitting pivot transfer (SPT). The secondary objective is to verify if there is a greater participation of the lower limbs during lift pivot phase...
September 15, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28078068/efficacy-of-emg-bioimpedance-triggered-functional-electrical-stimulation-on-swallowing-performance
#19
Corinna Schultheiss, Thomas Schauer, Holger Nahrstaedt, Rainer O Seidl, Jehoschua Bieler
In order to support swallowing, the efficacy of functional electrical stimulation for different stimulation settings of the submental musculature has been investigated. The stimulation was administrated at rest and synchronously to voluntary initiated swallows. The onset of a swallow was detected in real-time by a combined electromyography/ bioimpedance measurement at the neck in order to trigger the stimulation. The amplitude and speed of larynx elevation caused by the FES has been assessed by the observed change in bioimpedance whereas a reduction of bioimpedance corresponds to an increase in larynx elevation...
September 15, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28078066/use-it-or-lose-it-tonic-activity-of-slow-motoneurons-promotes-their-survival-and-preferentially-increases-slow-fiber-type-groupings-in-muscles-of-old-lifelong-recreational-sportsmen
#20
Simone Mosole, Ugo Carraro, Helmut Kern, Stefan Loefler, Sandra Zampieri
: Histochemistry, immuno-histochemistry, gel electrophoresis of single muscle fibers and electromyography of aging muscles and nerves suggest that: i) denervation contributes to muscle atrophy, ii) impaired mobility accelerates the process, and iii) lifelong running protects against loss of motor units. Recent corroborating results on the muscle effects of Functional Electrical Stimulation (FES) of aged muscles will be also mentioned, but we will in particular discuss how and why a lifelong increased physical activity sustains reinnervation of muscle fibers...
September 15, 2016: European Journal of Translational Myology
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