Simulation of intramuscular-EMG signals detected using implantable myoelectric sensors (IMES)
Simulation of intramuscular-EMG signals detected using implantable myoelectric sensors (IMES)
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DOI：
10.1109/tbme.2006.881774
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发表时间：
2006-10-01
影响因子：
4.6
通讯作者：
Kuiken, Todd A.
中科院分区：
文献类型：
--
作者：
Lowery, Madeleine M.;Weir, Richard E. ff.;Kuiken, Todd A.
本研究的目的是测试使用植入式肌电传感器（IMES）记录来自前臂的独立肌电图（EMG）信号的可行性，用于肌电假肢控制。使用两种不同的体积导体模型模拟动作电位：一种是用于探索周围非均匀组织电学特性影响的有限元（FE）模型，另一种是用于估计植入传感器的近似检测体积的解析无限体积导体模型。随着导电电极、陶瓷电极套管和高电阻率封装组织的加入，动作电位幅值逐渐增大。对于所检查的肌纤维位置，当模型中包含所有材料特性时，肌电图均方根振幅的平均增幅为18.2%（+/- 8.1%）。改变电极相对于光纤方向的取向改变了电极检测体积的形状并降低了电极的选择性。假设肌肉横截面呈圆柱形，在相对于肌肉纤维方向0度、22.5度和45度的电极方向上，IMES电极的估计检测半径分别为4.8、6.2和7.5 mm。
The purpose of this study was to test the feasibility of recording independent electromyographic (EMG) signals from the forearm using implantable myoelectric sensors (IMES), for myoelectric prosthetic control. Action potentials were simulated using two different volume conductor models: a finite-element (FE) model that was used to explore the influence of the electrical properties of the surrounding inhomogeneous tissues and an analytical infinite volume conductor model that was used to estimate the approximate detection volume of the implanted sensors. Action potential amplitude increased progressively as conducting electrodes, the ceramic electrode casing and high resistivity encapsulation tissue were added to the model. For the muscle fiber locations examined, the mean increase in EMG root mean square amplitude when the full range of material properties was included in the model was 18.2% ( +/- 8.1%). Changing the orientation of the electrode with respect to the fiber direction altered the shape of the electrode detection volume and reduced the electrode selectivity. The estimated detection radius of the IMES electrode, assuming a cylindrical muscle cross section, was 4.8, 6.2, and 7.5 mm for electrode orientations of 0 degrees, 22.5 degrees, and 45 degrees with respect to the muscle fiber direction.