Chaotic spiking in the Hodgkin-Huxley nerve model with slow inactivation of the sodium current.
The Hodgkin-Huxley (HH) equations with a modification in which the inactivation process (h variable) of sodium channels is slightly slowed down are investigated. It is shown that this slight modification changes the HH dynamics to a completely different one, with chaotic spiking and very long interspike intervals appearing in a generic manner, although the initiation mechanism of repetitive firing is a simple Hopf bifurcation.
Department of Electrical Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. doi@pwr.eng.osaka-u.ac.jp
Shinji
S
Doi
Junko
J
Inoue
Sadatoshi
S
Kumagai
D000200:Action Potentials / Q000502:physiology*; D000818:Animals; D008959:Models, Neurological; D009474:Neurons / Q000502:physiology*; D017711:Nonlinear Dynamics; D015222:Sodium Channels / Q000502:physiology*; D013997:Time Factors
D015222:Sodium Channels