Generic two-variable model of excitability.
We present a simple model that displays all classes of two-dimensional excitable regimes. One of the variables of the model displays the usual spikes observed in excitable systems. Since the model is written in terms of a "standard" vector field, it is always possible to fit it to experimental data displaying spikes in an algorithmic way. In fact, we use it to fit a series of membrane potential recordings obtained in the medicinal leech and time series generated with the FitzHugh-Nagumo equations and the excitability model of Eguía et al. [Phys. Rev. E 58, 2636 (1998)]. In each case, we determine the excitability class of the corresponding system.
Ventura
A C
AC
Departamento de Física, FCEN, UBA Ciudad Universitaria, Pabellón I (1428), Buenos Aires, Argentina.
Mindlin
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GB
Dawson
S Ponce
SP
D000818:Animals; D007865:Leeches; D008564:Membrane Potentials / Q000502:physiology; D008959:Models, Neurological; D015398:Signal Transduction / Q000502:physiology