The Experts below are selected from a list of 2601 Experts worldwide ranked by ideXlab platform
Hiroshi Akima - One of the best experts on this subject based on the ideXlab platform.
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validity of surface Electromyography for vastus intermedius muscle assessed by needle Electromyography
Journal of Neuroscience Methods, 2011Co-Authors: Kohei Watanabe, Hiroshi AkimaAbstract:Abstract Recently, a new recording technique for surface Electromyography (EMG) of the deeper muscle component of the quadriceps femoris muscle group, i.e., vastus intermedius (VI) muscle, from the distal portion of the VI muscle has been developed; however, the effect of electrode location on EMG signal of the VI muscle remains unclear. The aim of this study is to compare neuromuscular activation detected at the middle and distal portions of the VI muscle, in order to clarify whether the surface EMG of the VI muscle can be used to assess the neuromuscular activation of the entire muscle. Six healthy men participated in this study. During incremental ramp contraction of isometric knee extension (∼30% of maximal voluntary contraction), needle EMG was recorded from the middle and distal regions of the VI muscle and surface EMG was performed at the distal region of the VI muscle. Excellent correlation was observed between needle EMG at the middle and distal regions (r = 0.897–0.984, p
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validity of surface Electromyography for vastus intermedius muscle assessed by needle Electromyography
Journal of Neuroscience Methods, 2011Co-Authors: Kohei Watanabe, Hiroshi AkimaAbstract:Recently, a new recording technique for surface Electromyography (EMG) of the deeper muscle component of the quadriceps femoris muscle group, i.e., vastus intermedius (VI) muscle, from the distal portion of the VI muscle has been developed; however, the effect of electrode location on EMG signal of the VI muscle remains unclear. The aim of this study is to compare neuromuscular activation detected at the middle and distal portions of the VI muscle, in order to clarify whether the surface EMG of the VI muscle can be used to assess the neuromuscular activation of the entire muscle. Six healthy men participated in this study. During incremental ramp contraction of isometric knee extension (~30% of maximal voluntary contraction), needle EMG was recorded from the middle and distal regions of the VI muscle and surface EMG was performed at the distal region of the VI muscle. Excellent correlation was observed between needle EMG at the middle and distal regions (r=0.897-0.984, p<0.001). No significant difference was observed between correlation coefficient of surface EMG detected at the distal versus needle EMG detected at the middle and that of surface EMG detected at distal versus needle EMG detected at distal (p<0.05). These results suggest that surface EMG at the distal portion of the VI muscle, which is the only region available for surface EMG, can be used to evaluate global neuromuscular activation of the VI muscle during isometric contraction at a low force level.
Kenneth I Glassberg - One of the best experts on this subject based on the ideXlab platform.
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short pelvic floor Electromyographic lag time a novel noninvasive approach to document detrusor overactivity in children with lower urinary tract symptoms
The Journal of Urology, 2013Co-Authors: Andrew J Combs, Jason P Van Batavia, Mark Horowitz, Kenneth I GlassbergAbstract:Purpose: Noninvasive uroflow with simultaneous Electromyography can measure Electromyographic lag time, ie the interval between the start of pelvic floor relaxation and the start of urine flow (normally 2 to 6 seconds). Intuitively one would expect that in patients experiencing urgency secondary to detrusor overactivity the lag time would be short or even a negative value. We studied whether short Electromyographic lag time on uroflow with Electromyography actually correlates with documented detrusor overactivity on urodynamics.Materials and Methods: We reviewed 2 separate and distinct cohorts of 50 neurologically and anatomically normal children with persistent lower urinary tract symptoms who were evaluated by uroflow with simultaneous Electromyography and videourodynamics. Group 1 consisted of 30 boys and 20 girls (mean age 7.8 years, range 4 to 19) selected based on Electromyographic lag time of 0 seconds or less on screening uroflow with Electromyography who subsequently underwent videourodynamics. G...
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simplifying the diagnosis of 4 common voiding conditions using uroflow Electromyography Electromyography lag time and voiding history
The Journal of Urology, 2011Co-Authors: Jason P Van Batavia, Andrew J Combs, Grace Hyun, Agnes Bayer, Daisy Medinakreppein, Richard N Schlussel, Kenneth I GlassbergAbstract:Purpose: Noninvasive uroflowmetry with simultaneous Electromyography is useful to triage cases of lower urinary tract symptoms into 4 urodynamically defined conditions, especially when incorporating short and long Electromyography lag times in the analysis. We determined the prevalence of these 4 conditions at a single referral institution and the usefulness of uroflowmetry with simultaneous Electromyography and Electromyography lag time to confirm the diagnosis, guide treatment and monitor response.Materials and Methods: We retrospectively reviewed the records of 100 consecutive normal children who presented with persistent lower urinary tract symptoms, underwent uroflowmetry with Electromyography as part of the initial evaluation and were diagnosed with 1 of 4 conditions based on certain uroflowmetry/Electromyography features. The conditions included 1) dysfunctional voiding—active pelvic floor Electromyography during voiding with or without staccato flow, 2a) idiopathic detrusor overactivity disorder-A...
Lucian Sulica - One of the best experts on this subject based on the ideXlab platform.
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diagnosis of vocal fold paresis current opinion and practice
Laryngoscope, 2015Co-Authors: Amy P Wu, Lucian SulicaAbstract:OBJECTIVES/HYPOTHESIS: No accepted standard exists for the diagnosis of vocal fold paresis (VFP). Laryngeal specialists are surveyed to establish expert opinion on diagnostic methodology and criteria. STUDY DESIGN: Cross-sectional survey. METHODS: Questionnaires were distributed at laryngology conferences in fall 2013. Responses were collated anonymously and subjected to cross-tabulated data analysis. RESULTS: Fifty-eight responses completed by posttraining physicians whose practice focused in laryngology ≥ 75% were analyzed. One (1.7%) relied principally on laryngeal Electromyography, one (1.7%) on history, 10 (17%) on laryngoscopy, and 42 (72%) on strobovideolaryngoscopy for diagnosis. Only 12 (21%) performed laryngeal Electromyography on > 50% of vocal fold paresis patients. Laryngeal Electromyography sensitivity was considered moderate (61 ± 3.7%, σ = 28). Laryngoscopic/stroboscopic findings considered to have the strongest positive predictive value for VFP were slow/sluggish vocal fold motion (75 ± 3.0%, σ = 23), decreased adduction (67 ± 3.5%, σ = 27), decreased abduction (65 ± 3.4%, σ = 26), and decreased vocal fold tone (61 ± 3.5%, σ = 26). Asymmetric mucosal wave amplitude (52 ± 4.2%, σ = 32), asymmetric mucosal wave phase (60 ± 4.1%, σ = 31), hemilaryngeal atrophy (60 ± 4.0%, σ = 31), and asymmetric mucosal wave frequency (49 ± 4.0%, σ = 30) generated greatest disagreement. CONCLUSIONS: Surveyed expert laryngologists diagnose vocal fold paresis predominantly on stroboscopic examination. Gross motion abnormalities had the highest positive predictive value. Laryngeal Electromyography was infrequently used to assess for vocal fold paresis.
G. Alexander Patterson - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of patients with thoracic outlet syndrome
The Journal of hand surgery, 1993Co-Authors: Christine B. Novak, Susan E. Mackinnon, G. Alexander PattersonAbstract:This prospective study evaluated 50 patients with thoracic outlet syndrome. Detailed history and pain scale evaluation preceded physical examination, which included provocative tests (positional and compressive) and sensory evaluation (baseline and postprovocative vibration thresholds and two-point discrimination). Only one patient had a positive nerve conduction study/Electromyograph at the brachial plexus level. Thirty-two percent of the patients had a compressive anatomic abnormality as seen on a computed tomography scan. Ninety-four percent had positive provocative position and compression test results. Two-point discrimination was normal in 98%. Clinical assessment of thoracic outlet syndrome is best achieved by reproduction of symptoms with compression and positional provocative testing. Results of the majority of tests (nerve conduction studies/Electromyographs, x-ray films, sensory tests) will be normal. Measurements of changes in sensory thresholds during provocation of symptoms may be useful.
Kohei Watanabe - One of the best experts on this subject based on the ideXlab platform.
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validity of surface Electromyography for vastus intermedius muscle assessed by needle Electromyography
Journal of Neuroscience Methods, 2011Co-Authors: Kohei Watanabe, Hiroshi AkimaAbstract:Abstract Recently, a new recording technique for surface Electromyography (EMG) of the deeper muscle component of the quadriceps femoris muscle group, i.e., vastus intermedius (VI) muscle, from the distal portion of the VI muscle has been developed; however, the effect of electrode location on EMG signal of the VI muscle remains unclear. The aim of this study is to compare neuromuscular activation detected at the middle and distal portions of the VI muscle, in order to clarify whether the surface EMG of the VI muscle can be used to assess the neuromuscular activation of the entire muscle. Six healthy men participated in this study. During incremental ramp contraction of isometric knee extension (∼30% of maximal voluntary contraction), needle EMG was recorded from the middle and distal regions of the VI muscle and surface EMG was performed at the distal region of the VI muscle. Excellent correlation was observed between needle EMG at the middle and distal regions (r = 0.897–0.984, p
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validity of surface Electromyography for vastus intermedius muscle assessed by needle Electromyography
Journal of Neuroscience Methods, 2011Co-Authors: Kohei Watanabe, Hiroshi AkimaAbstract:Recently, a new recording technique for surface Electromyography (EMG) of the deeper muscle component of the quadriceps femoris muscle group, i.e., vastus intermedius (VI) muscle, from the distal portion of the VI muscle has been developed; however, the effect of electrode location on EMG signal of the VI muscle remains unclear. The aim of this study is to compare neuromuscular activation detected at the middle and distal portions of the VI muscle, in order to clarify whether the surface EMG of the VI muscle can be used to assess the neuromuscular activation of the entire muscle. Six healthy men participated in this study. During incremental ramp contraction of isometric knee extension (~30% of maximal voluntary contraction), needle EMG was recorded from the middle and distal regions of the VI muscle and surface EMG was performed at the distal region of the VI muscle. Excellent correlation was observed between needle EMG at the middle and distal regions (r=0.897-0.984, p<0.001). No significant difference was observed between correlation coefficient of surface EMG detected at the distal versus needle EMG detected at the middle and that of surface EMG detected at distal versus needle EMG detected at distal (p<0.05). These results suggest that surface EMG at the distal portion of the VI muscle, which is the only region available for surface EMG, can be used to evaluate global neuromuscular activation of the VI muscle during isometric contraction at a low force level.