Transient finite element modeling of functional electrical stimulation
Transient finite element modeling of functional electrical stimulation
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DOI：
10.4149/gpb_2011_01_59
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发表时间：
2011-03-01
影响因子：
1.5
通讯作者：
Jurisic-Skevin, Aleksandra J.
中科院分区：
文献类型：
--
作者：
Filipovic, Nenad D.;Peulic, Aleksandar S.;Jurisic-Skevin, Aleksandra J.
经皮功能性电刺激通常用于增强肌肉。然而，刺激过程中的瞬态效应尚未得到很好的探索。刺激幅度变化的影响可以用静态模型来描述，但不同脉冲持续时间的影响没有差异。本研究的目的是提出在前臂上的瞬态电刺激的有限元（FE）模型。用标准伽辽金程序推导了离散有限元方程。利用最小二乘法和实验测量的试错分析，拟合了不同组织的导电性能和介电性能。本研究表明，电刺激的有限元模型可以给出施加在前臂的电流的时空分布。为了拟合组织特性，采用瞬态有限元分析方法，采用相同的几何形状和不同的电流脉冲输入对三种不同的情况进行了建模。这三种情况都与一名志愿者的肌内电压的实验测量结果进行了比较。
Transcutaneous functional electrical stimulation is commonly used for strengthening muscle. However, transient effects during stimulation are not yet well explored. The effect of an amplitude change of the stimulation can be described by static model, but there is no differency for different pulse duration. The aim of this study is to present the finite element (FE) model of a transient electrical stimulation on the forearm. Discrete FE equations were derived by using a standard Galerkin procedure. Different tissue conductive and dielectric properties are fitted using least square method and trial and error analysis from experimental measurement.This study showed that FE modeling of electrical stimulation can give the spatial-temporal distribution of applied current in the forearm. Three different cases were modeled with the same geometry but with different input of the current pulse, in order to fit the tissue properties by using transient FE analysis. All three cases were compared with experimental measurements of intramuscular voltage on one volunteer.