The linear electrode array: a useful tool with many applications
The linear electrode array: a useful tool with many applications
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DOI：
10.1016/s1050-6411(02)00082-2
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发表时间：
2003-02-01
影响因子：
2.5
通讯作者：
Gazzoni, M
中科院分区：
文献类型：
--
作者：
Merletti, R;Farina, D;Gazzoni, M
在这篇综述中，我们描述了用于表面肌电信号检测的线性电极阵列的基本操作原理，以及它们最相关的当前应用。电极的线性阵列是检测位于沿着的多个点中的表面EMG信号的系统。空间滤波器通常被放置在用于信号检测的每个点中，使得利用线性阵列记录EMG信号对应于在皮肤上的电势分布的空间滤波版本的一个空间方向上的采样。线性阵列提供了运动单位（MU）解剖学特性的指示，例如神经支配区和肌腱的位置以及纤维长度。这样的系统允许体积导体的性质及其对表面检测到的信号的影响的调查。此外，线性阵列允许以非常低的估计标准偏差（大约0.1- 0.2m/s）来估计肌纤维传导速度，从而提供关于肌纤维膜特性及其随时间的变化（例如疲劳或治疗期间）的可靠指示。传导速度可以从信号历元（全局估计）或在单个MU水平估计。在后一种情况下，从干扰EMG信号中识别MU动作电位，并且针对每个检测到的电位估计传导速度。以这种方式，它是可能的，在某些条件下，调查单MU的控制和传导性能与一个完全非侵入性的方法。线性阵列提供了有价值的信息，神经肌肉系统的属性，似乎是有前途的工具，应用研究和临床研究。(C)2002爱思唯尔科技有限公司版权所有。
In this review we describe the basic principles of operation of linear electrode arrays for the detection of surface EMG signals, together with their most relevant current applications. A linear array of electrodes is a system which detects surface EMG signals in a number of points located along a line. A spatial filter is usually placed in each point for signal detection, so that the recording of EMG signals with linear arrays corresponds to the sampling in one spatial direction of a spatially filtered version of the potential distribution over the skin. Linear arrays provide indications on motor unit (MU) anatomical properties, such as the locations of the innervation zones and tendons, and the fiber length. Such systems allow the investigation of the properties of the volume conductor and its effect on surface detected signals. Moreover, linear arrays allow to estimate muscle fiber conduction velocity with a very low standard deviation of estimation (of the order of 0.1-0.2 m/s), thus providing reliable indications on muscle fiber membrane properties and their changes in time (for example with fatigue or during treatment). Conduction velocity can be estimated from a signal epoch (global estimate) or at the single MU level. In the latter case, MU action potentials are identified from the interference EMG signals and conduction velocity is estimated for each detected potential. In this way it is possible, in certain conditions, to investigate single MU control and conduction properties with a completely non-invasive approach. Linear arrays provide valuable information on the neuromuscular system properties and appear to be promising tools for applied studies and clinical research. (C) 2002 Elsevier Science Ltd. All rights reserved.