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  • Title: Transient finite element modeling of functional electrical stimulation.
    Author: Filipovic ND, Peulic AS, Zdravkovic ND, Grbovic-Markovic VM, Jurisic-Skevin AJ.
    Journal: Gen Physiol Biophys; 2011 Mar; 30(1):59-65. PubMed ID: 21460413.
    Abstract:
    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.
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