Spike Onset Dynamics and Response Speed in Neuronal Populations

Details Spike Onset Dynamics and Response Speed in Neuronal Populations Spike Onset Dynamics and Response Speed in Neuronal Populations

2011-03-03

arxiv.org/abs/1103.0668v1

Phys. Rev. Lett. 106, 088102 (2011)

Biology

Quantitative Biology

Neurons and Cognition

Scientific paper

Recent studies of cortical neurons driven by fluctuating currents revealed cutoff frequencies for action potential encoding of several hundred Hz. Theoretical studies of biophysical neuron models have predicted a much lower cutoff frequency of the order of average firing rate or the inverse membrane time constant. The biophysical origin of the observed high cutoff frequencies is thus not well understood. Here we introduce a neuron model with dynamical action potential generation, in which the linear response can be analytically calculated for uncorrelated synaptic noise. We find that the cutoff frequencies increase to very large values when the time scale of action potential initiation becomes short.

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