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Electrical behavior of a skeletal muscle fiber in a volume conductor of finite extent


A model study of the spatial distribution of the extracellular potentials and current densities arising from an active single skeletal muscle fiber in a cylindrical volume conductor of finite radial extent is presented. The paper examines the influence of the radius of the volume conductor,b, on the extracellular potentials and currents at different field points. The equivalent sources with respect to the extracellular potential are investigated as well. The axial source density associated with the primary and secondary sources is calculated using the expressions for the intracellular and extracellular potentials. The density of the secondary sources is a decreasing function of the radius of the conducting medium and approaches zero whenb becomes infinitely big.

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Trayanova, N.A. Electrical behavior of a skeletal muscle fiber in a volume conductor of finite extent. Biol. Cybern. 63, 121–125 (1990).

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  • Skeletal Muscle
  • Muscle Fiber
  • Spatial Distribution
  • Secondary Source
  • Skeletal Muscle Fiber