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Phys. Rev. E 64, 021913 (2001) [6 pages]

Stochastic resonance in a Hodgkin-Huxley neuron in the absence of external noise

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D. T. W. Chik1, Yuqing Wang1,2, and Z. D. Wang1,3,*
1Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
2Department of Mathematics, University of British Columbia, Vancouver, Canada
3Department of Material Science and Engineering, University of Science and Technology of China, Hefei, China

Received 11 December 2000; revised 18 April 2001; published 26 July 2001

We study numerically nonlinear responses of a periodically forced Hodgkin-Huxley neuron. The coherence of the system in the absence of external noise, namely, the “intrinsic stochastic resonance,” is evidenced by the multimodal aperiodic firing pattern, a bell-shaped curve in the signal-to-noise ratio, and the statistical features of the mean firing rate. The subthreshold intrinsic oscillations enhance the signal transduction in a manner different from that in models studied previously.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.64.021913
DOI:
10.1103/PhysRevE.64.021913
PACS:
87.19.La, 87.10.+e, 05.45.Pq

*Author to whom correspondence should be addressed. Email address: zwang@hkucc.hku.hk