Electromyography (EMG) - Methodology and application in occupational health
Electromyography (EMG) - Methodology and application in occupational health
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DOI：
10.1016/s0169-8141(96)00052-2
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发表时间：
1997-09-01
影响因子：
3.1
通讯作者：
Ro, O
中科院分区：
文献类型：
--
作者：
Aaras, A;Ro, O
在一项现场研究中，针对以下六个变量评价了标准化EMG（rms）（肌电图信号的均方根值）测量值的可靠性：ADF（幅度分布函数）的静态和中值以及负荷低于1%和2% MVC（最大随意收缩）时的时间和周期数。该方法的重现性表明，从12个VDU（视觉显示单元）操作员记录的两个测量值之间没有显着变化，标准化一致性指数（e）是负的，只有静态值的ADF。e = 1 -EI，其中EI（一致性指数）是差异的标准偏差的两倍与两次测量的平均值之间的比率。对于所有变量，该方法在稳定性比率SDmm/SDv方面的稳定性小于1，表明稳定性良好。SDmm是六次测量中每个受试者的最小值和最大值之间差异的标准差。SDv是每次访视时六次测量的标准差的平均值。通过比较两组的一次测量结果来研究结果的再现性，每组由24名从事类似工作的VDU操作员组成。两组之间在六个变量中的任何一个方面都没有发现显著差异（0.07
The reliability of normalized EMG(rms), (root mean square value of the electromyographic signal) measurements from musculus trapezius were evaluated for six variables in a field study: Static and median value of ADF (amplitude distribution function) and the time and number of periods when the load was below 1 and 2% MVC (Maximum Voluntary Contraction). The reproducibility of the method showed no significant changes between two measurements recorded from 12 VDU (Visual Display Unit) operators and the standardized agreement index (e) was negative only for the static value of the ADF. e = 1 -EI, where EI (agreement index) is the ratio between twice the standard deviation of the difference and the mean of the two measurements, The stability of the method in terms of stability ratio SDmm/SDv, was less than 1 for all variables, indicating a good stability. SDmm is the standard deviation of the difference between minimum and maximum value for each of the subjects for the six measurements. SDv is the average of the standard deviations of the six measurements at each visit, The reproducibility of the results was investigated by comparing one measurement from two groups, each consisting of 24 VDU operators doing similar type of work. No significant difference were found between the groups with regard to any of the six variables (0.07