导读

正如Carlo De Luca教授指出的那样:“肌电图的使用非常容易,因此也很容易滥用。” (在生物力学中使用表面肌电图,1997)。那么,我们该如何纠正呢?教育。通过学习和了解肌电图(EMG)应用背后的因素和概念,我们可以更好地指导技术的使用并进一步探索神经控制。


理解EMG应用的关键一步是探索控制信号采集,处理和分析的基本结构。Jennifer Martay博士(英国安格鲁斯鲁金大学)和Hugo Martay博士创建了交互式工具来介绍EMG数据采集和分析的基础。


该模拟工具允许初始用户进一步可视化如何通过传播肌肉纤维的动作电位创建EMG轨迹。其他因素会影响所记录的EMG信号。内在和外在因素的作用可以在相关的研究论文中进一步探讨。


https://aru.ac.uk/people/jennifer-martay


EMG神经肌肉模拟

http://articlesbyaphysicist.com/muscle_emg.html


该工具通过沿着神经和沿着肌肉纤维的动作电位来创建EMG轨迹。您可以用鼠标将两个电极放在肌肉上。电极从穿过肌肉纤维的动作电位中拾取电压。电压显示在页面底部的EMG轨迹中。




The muscle can be “Tense” (100% of fibres get action potentials), “Medium” (50% of fibres get action potentials), or “Relaxed” (0% of fibres get action potentials).

肌肉可以是“紧张”(100%的纤维具有动作电位),“中等”(50%的纤维具有动作电位)或“松弛”(0%的纤维具有动作电位)。


You can view as “Time Fast”, “Time Medium”, or “Time Slow”, which changes the speed of the action potentials moving along the fibre. You can also use “Time Stopped” to stop the action potentials.

您可以将其视为“时间快”、“时间中”或“时间慢”,这会改变动作电位沿纤维移动的速度。你也可以用“停止时间”来停止动作电位。


In “Realistic”, the muscle is split into different motor groups (one fibre per motor group), and the action potentials to each are realistic in that they are not synchronised. Action potentials join the muscle fibres near the middle, and propagate both ways. This is similar to what happens in real vertebrate muscles.

在“现实”中,肌肉被分成不同的运动组(每个运动组一个纤维),每个运动组的动作电位是现实的,因为它们不是同步的。动作电位靠近中间连接肌肉纤维,并向两边传播。这与真正的脊椎动物的肌肉相似。


In “Simplified”, only one action potential moves through the nerve and muscle at a time. All action potentials move from left to right only.

在“简化”中,一次只有一个动作电位通过神经和肌肉移动。所有动作电位只从左向右移动。




肌电图分析工具

http://www.articlesbyaphysicist.com/emg_waves.html



该工具使您可以交互式地分析EMG信号。



Signals can be viewed in "Normal View" or "Spectrum". "Normal View" shows EMG signals with time as the x axis. "Spectrum" shows spectrum / frequency plots of the EMG signals with frequency as the x axis. "Zoom" allows you to zoom into plots.

可以在“普通视图”或“频谱”中查看信号。“正常视图”显示了以时间为x轴的EMG信号。“频谱”以频率为x轴显示EMG信号的频谱/频率图。“缩放”可让您放大绘图。


Below this, choose the Activity and Muscle Groups to consider from the drop down boxes.

在此下方,从下拉框中选择要考虑的活动和肌肉组。


Raw EMG signals are shown in the top 2 figures called "Raw Input". Various analysis steps that can be performed are listed on the far left of the page. The analysis step type, order, and frequency can be set for each step. Plots showing the results of each step are generated to the right. Up to 7 analysis steps can be performed using this tool, with each intermediate plot created.

原始的EMG信号显示在前两个图中,称为“原始输入”。页面最左侧列出了可以执行的各种分析步骤。可以为每个步骤设置分析步骤的类型,顺序和频率。右侧显示了显示每个步骤的结果的图。使用此工具最多可以执行7个分析步骤,并创建每个中间图。



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