ELECTRODE PLACEMENT 电极放置
电极位置对EMG变量估计的影响
EMG detection with a linear electrode array is a powerful technique to extract useful information from the surface signal and also helps in understanding the appropriate use of a single electrode pair. Consider, for example, the two monopolar potentials of an MU that are propagating in opposite directions in the upper left of Figure 1. They are very similar. If a differential detection is obtained by means of two electrodes placed one on each side of the IZ at the same distance from it, the resulting voltage will be the difference of almost equal time-varying voltages and will be the following:带有线性电极阵列的EMG检测是一种从表面信号中提取有用信息的强大技术,还有助于理解单个电极对的正确用法。例如,考虑一下MU的两个单极电势,它们在图1的左上方以相反的方向传播。它们非常相似。如果通过在IZ的每侧各放置一个电极的两个电极获得相同的距离来进行差分检测,则所得电压将是几乎相等的时变电压之差,并且将为:
Small with respect to the monopolar potentials单极电位较小Sensitive to differences in shape between the two propagating waves, which depend on the distribution of the neuromuscular junctions (NMJs) w