来自肌肉内微电极阵列记录的动力单元采样
概括
使用多个电极的高密度肌内电磁图 (HD-iEMG) 可以最大限度地识别运动单元. 这种侵入性技术为研究和临床应用提供了与表面EMG相比更优质的运动单元采样.
科学领域:
- 生物医学工程 生物医学工程
- 神经科学是一个神经科学.
- 发动机控制器的控制器
背景情况:
- 肌肉的电活动反映了脊柱运动神经元的输出.
- 高密度表面EMG (HD-sEMG) 和肌内EMG (HD-iEMG) 解码运动单元活动.
- HD-iEMG产生的电机单元比HD-sEMG更多,但电极参数效应是未知的.
研究的目的:
- 使用HD-iEMG调查电极数量,间距和肌肉插入如何影响机动单元产量.
- 确定最佳的HD-iEMG配置,以准确地采样动力单元.
- 在动力单元分解中比较HD-iEMG和HD-sEMG的性能.
主要方法:
- 记录了HD-sEMG和HD-iEMG从两名受试者的前肌肉.
- 使用了新的HD-iEMG电极,每个肌肉插入有140多个位点.
- 测试了各种电极配置和收缩强度 (10%,30%,70% MVC).
主要成果:
- 在HD-iEMG阵列中的电极密度是最大化电机单元识别和准确性的主要因素.
- 在所有受试者和收缩水平上,HD-iEMG总是比HD-sEMG捕获更多的运动单元.
- 用HD-iEMG电极插入多个肌肉,可以从数百个地点进行记录.
结论:
- 高清iEMG,特别是具有高电极密度的高清iEMG,是精确分解电机单元的强大工具.
- 这项技术对临床诊断和神经科学研究具有重大潜力.
- 优化的HD-iEMG设置可以增强我们对神经控制运动的理解.
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