Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Median Frequency"”.
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POWER SPECTRAL ANALYSIS OF SURFACE MYOELECTRIC SIGNALS DURING DYNAMIC CONTRACTIONS
… using spectral parameters like mean power frequency, ratios of powers in several arbitrarily chosen spectral bands and median frequency. The median frequency has been shown to be a reliable indicator of such changes during static contractions. Few such studies, however, are available in the …
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Endurance of Lower Paraspinals and Gluteal Muscles Using Surface EMG on Healthy Subjects During Performance of Common Lumbar Stabilization Exercises
… Surface EMG was used to measure fatigue via a median frequency shift of the power spectrum to the low end of the frequency continuum and an increase in EMG activity in the same area of the spectrum. Fatigue would have taken place when EMG activity increased and median frequency shifts to the …
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Personalised warfarin dosing in children after congenital heart surgery using the model-based approach
… the case subjects compared to the controls, the median time to achieve the first therapeutic INR values was longer (5 vs 2 days), the median time to stable anticoagulation was shorter (29.0 vs 96.5 days), the median time to over-anticoagulation was longer (15.0 vs 4.0 days), the median percentage …
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Studies of the Wall Shear Stress in a Turbulent Pulsating Pipe Flow
… response is obtained and the dimensionless frequency, (omega)('+), is large compared to that studied by most previous investigators. The most striking feature of the results is a relaxation effect, similar to what has been observed for flow over a wavy surface, whereby the phase angle …
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Temporal Dynamics at the Neurobehavioral Interface: In Search of a Common Currency
… (INT) which are manifest in both time and frequency domain. However, the relationship of the brain’s INT to the varied timescales of behavior remains unclear. I investigate the dynamics of INT by measuring the median frequency (MF) via sliding window analyses in both electroencephalography …
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The Relative Importance of Four Muscle Groups for Rock Climbing Performance
… results were not significant (p > 0.05). EMG median frequency for each muscle was reduced from beginning to end of each pre-fatiguing exercise. No significant differences were found among transit times (between end of pre-fatigue and start of route) (p > 0.5). These results suggest that among …
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Muscle Fatigue at the End of a Maximal Oxygen Consumption Test
… The root mean square (RMS), mean power frequency (MPF), and median frequency (MF) were extracted and normalized using the maximal voluntary contraction (MVC) from the selected sEMG samples. MATLAB was used in order to observe the tendencies over time for the left and right rectus …
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Using immunofluorescence techniques to Identify T cells in the foreskin tissue after medical male circumcision
… to TNFα showed a significant increase in the median density of CD3+CD4+ T cells in the epithelium of the inner foreskin (p=0.035) from 78.90 cells/mm2 (IQR: 33.02-127.50) in the unstimulated inner foreskin explants to 134.80 cells/mm2 (IQR: 109.30-206.60). Similarly, the addition of exogenous …
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Isolation and characterization of primitive hematopoietic cells
… LTC-IC potential. We detected murine SP with a median frequency of 0.03 When co-staining with verapamil was performed, the frequency of SP cells significantly decreased. There was an increase of CFUs yielded from murine SP cells as compared to unfractionated cells with a median enrichment of 52- …
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Effects of Tool Weight on Fatigue and Performance During Short Cycle Overhead Work Operations
… the mid deltoid as determined by changes in the median frequency of the EMG power spectrum was shown to change significantly (p<0.05) with change in tool weight. Large intersubject variation was observed for the dependent measures, which showed subjects experiencing different levels of fatigue …
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Comparisons Of Time To Task Failure And Muscle Activity For Two Different Submaximal Fatiguing Contractions
… fatiguing contractions, and the normalized emg median frequency value of triceps brachii for force task was significantly higher than the position task. In conclusion, during the fatiguing contractions, the muscle activities of women's angonist and antagonist increased quicker than those of …
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Human physiological and biomechanical responses to vibration exercise
… static squats, despite a downward shift in median frequency of the EMG power spectra. Analysis of upper body muscles during press ups yielded significant increases in muscle activation, equivalent to increasing the load of the bench press by 10% of the one repetition maximum. The results …
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Contributions of Muscle Fatigue to a Neuromuscular Neck Injury in Female Standard Ballroom Dancers
… injury in female standard ballroom dancers. The median frequency (MF) as measured by electromyography (EMG) of the left upper trapezius (UT), left splenius capitius (SPL), and right sternocleidomastoid (SCM) of injured dancers was compared to non-injured dancers. This comparison was performed to …
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Evaluation of short-term conservative treatment in patients with tennis elbow (lateral epicondylitis): A prospective randomised, assessor-blinded trial.
… The outcome measures of thermal difference, median frequency (MDF), patient-rated tennis elbow evaluation questionnaire (PRTEE), pain-free grip strength (PFG) and patient preference were assessed twice at baseline, at 10 days, 6 weeks and 6 months and analysed as an intention to treat …
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Quantification of Cumulative Load on the Knee using a Vibration Emission Method
… of an ensemble average constructed for the frequency spectrum of all participants revealed that differences may exist in the 750 Hz - 2000 Hz bandwidth for vibrations coming from the patella during flexion. Further statistical analysis by a t-test and ANOVA showed a decrease in the RMS power …
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The effects of the lumbopelvic manipulation on the fatigability of the back and hip muscles in adults with chronic low back pain
… measured by the surface electromyographic (EMG) median frequency (MF). In addition, literature suggests that lumbopelvic manipulation could be an effective intervention for reducing CLBP. However, the effects of lumbopelvic manipulation on lumbar or hip muscle fatigability have not been studied …
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The assessment of movement demands and neuromuscular fatigue in female softball players
… and offensive gameplay, with a focus on the frequency and duration of movements occurring and differences between positional groups; 2) determine the reliability of the ForceFrame Hip Strength Testing System in assessing hip and shoulder strength of female softball players unaccustomed to …
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Assessing the Effects of Exoskeleton Use on Balance and Postural Stability
… during quiet bipedal stance, BSE use increased median frequency and velocity of the center of pressure in the anterior-posterior direction. In the second study on level walking, BSE use caused an increase in gait step width and gait variability, and decrease in the margin of stability. BSE use …
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Extraction of Electrocardiography Artefacts From Surface Electromyography Signals Using Continuous Wavelet Transform
… trunk can influence time-based (amplitude) and frequency-based measures of the EMG signal. This has important implications when interpreting the amount of muscle recruitment and the level of fatigue of trunk musculature. To date, there is little information showing the degree of contamination of …
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