Quantitative EMG: Could it be used to differentiate between Type I and Type II muscle fibers?
[摘要] Background: Quantitative EMG analysis (QA) involves a discipline of quantitating the various features of the MUAPs. Objective: is to delineate the electrophysiological features of type I and type II muscle fibers by QA. Methods: Quantitative EMG in the dominant vastus medialis muscle was studied in thirty three healthy male subjects, aged 18-25 years old. Surface EMGs of the dominant vastus medialis muscle were examined during mild and maximal voluntary contraction guided by a dynamometer (a standard measurement of strength). The electrophysiological parameters that characterize type I and type II muscles fibers including the interturn (duration between turns),T/A amplitude analysis ,mean and maximum amplitude and the turns/second ,were analyzed in terms of mean, standard deviation, standard error of mean, mode, median, range and the minimum and maximum values. Results: A highly statistically significant difference P<0.000 was found between the electrophysical parameters characterizing type I and type II muscles fibers Conclusion: QA appears to be a valuable supplement to the routine EMG examination. (Egypt J Neurol Psychiat Neurosurg. 2010; 47(1): 123-129)
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[效力级别] [学科分类] 精神健康和精神病学
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