Temperature-dependent stochastic dynamics of the Huber-Braun neuron model.
The response of a four-dimensional mammalian cold receptor model to different implementations of noise is studied across a wide temperature range. It is observed that for noisy activation kinetics, the parameter range decomposes into two regions in which the system reacts qualitatively completely different to small perturbations through noise, and these regions are separated by a homoclinic bifurcation. Noise implemented as an additional current yields a substantially different system response at low temperature values, while the response at high temperatures is comparable to activation-kinetic noise. We elucidate how this phenomenon can be understood in terms of state space dynamics and gives quantitative results on the statistics of interspike interval distributions across the relevant parameter range.
ICBM, Carl-von-Ossietzky-Strasse 9-11, University of Oldenburg, 26111 Oldenburg, Germany.
Christian
C
Finke
Jan A
JA
Freund
Epaminondas
E
Rosa
Paul H
PH
Bryant
Hans A
HA
Braun
Ulrike
U
Feudel
D000200:Action Potentials / Q000502:physiology*; D000818:Animals; D002462:Cell Membrane / Q000502:physiology*; D003198:Computer Simulation; D006801:Humans; D008959:Models, Neurological; D015233:Models, Statistical; D051381:Rats; D011984:Sensory Receptor Cells / Q000502:physiology*; D013269:Stochastic Processes; D013696:Temperature