Regensburg 2004 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 24: Dynamic Instabilities in Biophysics
DY 24.5: Vortrag
Dienstag, 9. März 2004, 15:45–16:00, H2
What Determines the Speed of Neural Processing? — •Björn Naundorf, Theo Geisel, and Fred Wolf — Max-Planck Institut für Strömungsforschung and Fakultät für Physik, Universität Göttingen, 37073 Göttingen, Germany
In a generic neuron model, we present the linear response theory for the firing rate in response to both time dependent input currents and noise amplitudes. In both cases the signal transmission is strongly attenuated for frequencies above the stationary firing rate. For high frequencies both the mean input and the noise transmission function decay as ω−2, independent of model details. Moreover we study a sparse two-population network consisting of inhibitory and excitatory neurons focusing on the dependence of the transmission speed on coupling strength.
Our results indicate that previously suggested mechanisms for near instantaneous transmission of small signals at single neuron level [1,2] are not consistent with the spike generating mechanism of real neurons. 0pt
[1] N.Brunel el al., PRL 86, 2186 (2001)
[2] B.Lindner, and L.Schimansky-Geier, PRL 86, 2934 (2001)