The Experts below are selected from a list of 39294 Experts worldwide ranked by ideXlab platform
Alessandro Mauro - One of the best experts on this subject based on the ideXlab platform.
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Use of surface EMG for Evaluation of upper limb spasticity during botulinum toxin therapy in stroke patients.
Functional neurology, 2010Co-Authors: Giovanni Albani, Veronica Cimolin, Manuela Galli, Sara Laura Vimercati, Daniela Bar, Laura Campanelli, Roberto Gandolfi, R. Lombardi, Alessandro MauroAbstract:The clinical assessment of spasticity in stroke patients generally includes descriptive scales, such as the Modified Ashworth Scale (MAS) and the Global Pain Scale (GPS), however these may not be sufficiently sensitive to accurately detect improvements, especially at upper limb level; electromyography (EMG) may be the answer to this clinical requirement. The aim of this study was to quantify the effects of botulinum toxin type A (BTX) in treating upper extremity spasticity in stroke patients, using clinical Evaluation (MAS and GPS) and EMG. Ten patients were assessed before, 30 days and 180 days after BTX injection using clinical Evaluations and EMG. At 30 days all clinical measures improved significantly. Whereas MAS scores, after recording an improvement at the first Evaluation Session, were worse at the second assessment, GPS scores improved over time, both at the first and at the second Evaluation Session. A reduction of EMG activity was found 30 days after injections, in particular at baseline and during passive flexion movement. Our results demonstrated that measurement of EMG activity may be an effective means of detecting functional improvements and of monitoring the effects of treatment in post-stroke patients.
Bradford J Mcfadyen - One of the best experts on this subject based on the ideXlab platform.
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upper limb motor strategies in persons with and without shoulder impingement syndrome across different speeds of movement
Clinical Biomechanics, 2008Co-Authors: Jeansebastien Roy, Helene Moffet, Bradford J McfadyenAbstract:Abstract Background Activities requiring repetitive arm movements, including high velocity actions, have been identified as a risk factor for shoulder impingement. However, the effect of speed on upper limb motor strategies has yet to be evaluated for individuals with shoulder impingement. The aims of this study were to characterize upper limb motor strategies in individuals with and without shoulder impingement during reaching at natural speed and to evaluate their adaptation to higher speeds of movement. Methods Twenty healthy individuals and 33 individuals with shoulder impingement took part in one Evaluation Session. They performed reaching at natural and fast speeds, toward targets located at 90° of arm elevation in two different planes. Reaching speed, upper limb kinematics and shoulder muscular activity were used to characterize motor strategies. Findings Individuals with shoulder impingement present altered motor strategies during reaching tasks. However, changes with speed were comparable in both groups, showing similar adaptation to speed. Larger intergroup differences were found when individuals with shoulder impingement were separated into groups presenting higher or lower than normal clavicular elevation. In the frontal plane, increased clavicular elevation for individuals with impingement was associated with more trunk rotation, less elbow flexion and upper trapezius electromyographic activity during reaching, and a more anterior plane of shoulder elevation at the end of reaching as compared to the healthy individuals. Interpretation The present results demonstrate that not all individuals with shoulder impingement present the same abnormal motor strategy. Therefore, characterizing motor strategies before implementing rehabilitation intervention is essential.
Francis Degache - One of the best experts on this subject based on the ideXlab platform.
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Influence of recovery time on strength during a testing protocol of knee
Journal de Traumatologie du Sport, 2016Co-Authors: P.l. Bernard, Pascal Edouard, G. Tallon, Stéphane Perrey, Maxime Billot, Hubert Blain, P. Codine, Francis DegacheAbstract:Abstract The aim of the present study was to compare the influence of three rest intervals of 30, 60 and 180 seconds randomly applied between two sets of five isokinetic contractions of flexor-extensor knee muscles in a cohort composed of 14 men (32.5 ± 8 years). The comparison of the isokinetic values measured during the first set of each Evaluation Session showed no significant differences (0.55
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Influence of recovery time on strength during an isokinetic testing protocol of knee
Annals of Physical and Rehabilitation Medicine, 2015Co-Authors: P.l. Bernard, G. Tallon, Hubert Blain, Francis DegacheAbstract:Introduction Previous studies have demonstrated that a one minute between set rest period was sufficient for recovery. The aim of the present study was to compare the influence of different rest intervals. Methods Two sets of five isokinetic contractions of flexor-extensor knee muscles in a cohort composed of 14 men (32.5 years ± 8) with three counter-balanced rest intervals of 30, 60 and 180 seconds were proposed. Results The comparison of the isokinetic values measured during the first set of each Evaluation Session showed no significant differences (0.55 P Discussion and conclusion These findings raise questions about a strict energetic approach which focused on the rest interval needed for the resynthesis of phosphocreatine substrates mobilized during a maximal effort. So, future research should analyze the interaction of force production and fatigue phenomena in relation to the rest interval.
Andreas Pombortsis - One of the best experts on this subject based on the ideXlab platform.
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“Graphical” Jogthrough: expert based methodology for user interface Evaluation, applied in the case of an educational simulation interface
Computers and Education, 1999Co-Authors: Stavros Demetriadis, Athanasios Karoulis, Andreas PombortsisAbstract:“Walkthrough” and “Jogthrough” techniques are well known expert based methodologies for the Evaluation of user interface design. In this paper we describe the use of “Graphical” Jogthrough method for evaluating the interface design of the Network Simulator, an educational simulation program that enables users to virtually build a computer network, install hardware and software components, make the necessary settings and test the functionality of the network. Graphical Jogthrough is a further modification of a typical Jogthrough method, where evaluators' ratings produce evidence in the form of a graph, presenting estimated proportion of users who effectively use the interface versus the time they had to work with it in order to succeed effectiveness. We comment on the question: “What are the possible benefits and limitations of the Graphical Jogthrough method when applied in the case of educational software interface design?” We present the results of the Evaluation Session, and concluding from our experience we argue that the method could offer designers quantitative and qualitative data for formulating a useful (though rough in some aspects) estimation about the novice–becoming–expert pace that end users might follow when working with the evaluated interface.
David J Reinkensmeyer - One of the best experts on this subject based on the ideXlab platform.
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A crossover pilot study evaluating the functional outcomes of two different types of robotic movement training in chronic stroke survivors using the arm exoskeleton BONES
Journal of NeuroEngineering and Rehabilitation, 2013Co-Authors: Marie-hélène Milot, Steven J Spencer, Vicky Chan, James P Allington, Julius Klein, Cathy Chou, James E Bobrow, Steven C Cramer, David J ReinkensmeyerAbstract:Background To date, the limited degrees of freedom (DOF) of most robotic training devices hinders them from providing functional training following stroke. We developed a 6-DOF exoskeleton (“BONES”) that allows movement of the upper limb to assist in rehabilitation. The objectives of this pilot study were to evaluate the impact of training with BONES on function of the affected upper limb, and to assess whether multijoint functional robotic training would translate into greater gains in arm function than single joint robotic training also conducted with BONES. Methods Twenty subjects with mild to moderate chronic stroke participated in this crossover study. Each subject experienced multijoint functional training and single joint training three Sessions per week, for four weeks, with the order of presentation randomized. The primary outcome measure was the change in Box and Block Test (BBT). The secondary outcome measures were the changes in Fugl-Meyer Arm Motor Scale (FMA), Wolf Motor Function Test (WMFT), Motor Activity Log (MAL), and quantitative measures of strength and speed of reaching. These measures were assessed at baseline, after each training period, and at a 3-month follow-up Evaluation Session. Results Training with the robotic exoskeleton resulted in significant improvements in the BBT, FMA, WMFT, MAL, shoulder and elbow strength, and reaching speed (p
