Abstract.
We present the discussion on the possibility to scale the classical dimensionless FitzHugh-Nagumo model of neuronal self-sustained oscillations to the range of variables corresponding to the results, which are provided by the biophysically relevant reduced two-dimensional Hodgkin-Huxley equations (the Rinzel model). It is shown that there exists a relatively simple choice of affine transformation, which results in time-dependent solutions, which reproduce with a high accuracy the time course of the recovery variable and the sharp onsets (intervals of fast motions on a phase trajectories) of the voltage spikes. As for the latter, the reasons for unavoidable difference are discussed as well as a necessity of taking into account applied current values during such a scaling procedure.
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Postnikov, E.B., Titkova, O.V. A correspondence between the models of Hodgkin-Huxley and FitzHugh-Nagumo revisited. Eur. Phys. J. Plus 131, 411 (2016). https://doi.org/10.1140/epjp/i2016-16411-1
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DOI: https://doi.org/10.1140/epjp/i2016-16411-1