High-frequency effects in the FitzHugh-Nagumo neuron model.
The effect of a high-frequency signal on the FitzHugh-Nagumo excitable model is analyzed. We show that the firing rate is diminished as the ratio of the high-frequency amplitude to its frequency is increased. Moreover, it is demonstrated that the excitable character of the system, and consequently the firing activity, is suppressed for ratios above a given threshold value. In addition, we show that the vibrational resonance phenomenon turns up for sufficiently large noise strength values.
Cubero
David
D
Física Teórica, Universidad de Sevilla, Apartado de Correos 1065, Sevilla 41080, Spain. dcubero@us.es
Baltanás
J P
JP
Casado-Pascual
Jesús
J
D000200:Action Potentials; D000818:Animals; D003198:Computer Simulation; D006801:Humans; D008959:Models, Neurological; D009474:Neurons / Q000502:physiology* / Q000528:radiation effects; D017711:Nonlinear Dynamics; D011840:Radiation, Nonionizing; D013269:Stochastic Processes