Fig. 3.

(A) Schematic representation of the equivalent electrical circuit of a cylinder shaped myofiber with radius a. The circuit parameters model the extracellular resistance R _e, intracellular resistance R _i, membrane surface capacitance C _m, and membrane resistance R _m. Owing to the membrane permeability at low frequencies (illustrated by the blue sine-waves), only high-frequency current (illustrated by the red sine-waves) can flow through the intracellular compartment. (B) Representation of the Cole impedance model in the complex plane and, equivalently, (C) the resistance and reactance as function of the frequency (C)