Noise-assisted spike propagation in myelinated neurons

Details Noise-assisted spike propagation in myelinated neurons Noise-assisted spike propagation in myelinated neurons

2008-11-20

arxiv.org/abs/0811.3371v1

Phys. Rev. E 79, 011904 (2009)

Biology

Quantitative Biology

Neurons and Cognition

8 pages, 12 figures, accepted for publication in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.79.011904

We consider noise-assisted spike propagation in myelinated axons within a multi-compartment stochastic Hodgkin-Huxley model. The noise originates from a finite number of ion channels in each node of Ranvier. For the subthreshold internodal electric coupling, we show that (i) intrinsic noise removes the sharply defined threshold for spike propagation from node to node, and (ii) there exists an optimum number of ion channels which allows for the most efficient signal propagation and it corresponds to the actual physiological values.

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