A modified technique of the finite-difference method (FDM) calculations was developed to mimic the measurements of the electrical impedance, Z , and admittance, Y , of skeletal muscles using the four-terminal method. The elements in this technique contained bundled plural tubular muscle cells. The electrical currents in the transversal direction were formulated based on a theory for two-dimensional suspensions, and those in the longitudinal direction were formulated based on the discretized cable-line theory. Using the relations for the currents, simultaneous linear relations with respect to electrical potentials in the intercellular medium and cell interior at the center of the elements were constructed. The effects of the T-tubules and surface membrane folding were included using the equivalent complex conductivity for the surface membrane. The current-supply electrodes were characterized as regions of fixed potentials. At each potential-pickup electrode, the summa...

中文翻译：

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一种改进的有限差分方法计算技术，可模拟四端法测量骨骼肌的电阻抗和导纳

开发了一种改进的有限差分法（FDM）计算技术，以模拟使用四端子法测量骨骼肌的电阻抗Z和导纳Y的方法。该技术中的元素包含成束的多个管状肌细胞。横向电流基于二维悬架理论制定，纵向电流基于离散电缆理论制定。利用电流的关系，构造了相对于细胞间介质和元件中心的细胞内部中的电位的同时线性关系。使用与表面膜等效的复数电导率，可以包括T管和表面膜折叠的影响。供电电极被表征为固定电位的区域。在每个电位拾取电极处，汇总...