Berlin 2008 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
DY: Fachverband Dynamik und Statistische Physik
DY 17: Poster I
DY 17.21: Poster
Dienstag, 26. Februar 2008, 16:00–18:00, Poster C
Interspike Interval Distribution of a Neuron Driven by Colored Noise — Tilo Schwalger1,2, •Jessica Strefler1, and Lutz Schimansky-Geier1 — 1Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin — 2RIKEN Brain Science Institute, Hirosawa 2-1, Wako, Saitama 351-0198, Japan
The interspike interval (ISI) density of the leaky integrate-and-fire neuron model driven by exponentially correlated Gaussian noise exhibits a dominant peak at small bursting intervals and a slow power-law decay of long interburst intervals. Due to this power-law decay, extreme ISIs have a large effect on the ISI statistics. This leads to a coefficient of variation which diverges as t1/2 and an unexpected suppression of ISI correlations. This is in clear contrast to the colored noise effect in simpler neuron models, where the effect of noise correlations appeared in higher order statistical measures. Additionally, we study the impact of a dichotomous driving force.