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A method for calculation the extracellular potentials from experimentally recorded intracellular potentials of a single muscle fibers.

A method for calculation the extracellular potentials from experimentally recorded intracellular potentials of single muscle fibers is proposed. The method is based on the use of Fourier transform technique. The extracellular potentials of single frog muscle fibers in homogeneous unbounded volume conductor at different temperature are calculated. An analytical approximation of the intracellular action potential (including the afterpotential) is proposed. By the use of this approximation the capability of the method is studied.