Blok Joleen H, Van Dijk Johannes P, Zwarts Machiel J, Stegeman Dick F
Department of Clinical Neurophysiology, Erasmus Medical Centre, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands.
Muscle Nerve. 2005 Sep;32(3):280-91. doi: 10.1002/mus.20357.
High-density multichannel electromyography (EMG) recordings add spatial information to the temporal information content of the surface EMG (sEMG) signal. This study explores the potential value of such multichannel information at a single motor unit level, in particular for the improvement of motor unit number estimation (MUNE) techniques. It is shown that multichannel recordings make it easier to distinguish motor unit action potentials (MUAPs) and that MUAP combinations can be better resolved. Furthermore, the spatiotemporal information allows a quantitative assessment of the representativity of the mean of the recorded MUAPs in relation to the maximum CMAP, i.e., for the muscle as a whole. In general, this is practically impossible on the basis of temporal information alone. For these reasons, we expect that high-density sEMG has the potential to address several methodological limitations of single channel surface EMG recordings. This is specifically illustrated in this study for one of the MUNE techniques in use, the F-response method.
高密度多通道肌电图（EMG）记录为表面肌电图（sEMG）信号的时间信息内容增添了空间信息。本研究探讨了这种多通道信息在单个运动单位水平上的潜在价值，特别是对于改善运动单位数量估计（MUNE）技术。结果表明，多通道记录更容易区分运动单位动作电位（MUAPs），并且可以更好地解析MUAP组合。此外，时空信息允许对记录的MUAPs均值相对于最大复合肌肉动作电位（CMAP）的代表性进行定量评估，即对于整个肌肉而言。一般来说，仅基于时间信息实际上是不可能做到这一点的。出于这些原因，我们预计高密度sEMG有潜力解决单通道表面肌电图记录的几个方法学局限性。本研究针对一种正在使用的MUNE技术——F反应法，具体说明了这一点。
