Journal
PHYSICS LETTERS A
Volume 282, Issue 1-2, Pages 23-30Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0375-9601(01)00167-0
Keywords
spike timing precision; encoding; stochastic resonance; intrinsic oscillation
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The spike timing precisions of an array of neurons to periodic input are studied. For weak signal, the precision versus the noise intensity shows a stochastic resonance (SR) behavior. The optimal noise intensity corresponding to the maximal resonance shows a global minimum as increasing signal frequency. As the signal amplitude increases above a critical value, the SR effect disappears, and the critical amplitude goes through a global minimum as the signal frequency increases. A frequency sensitive range of 30-100 Hz with high spike timing precisions and high coherence of the firings are found. It is the resonance between the intrinsic oscillation and the signal resulting in the dependence of the dynamical features of SR on the forcing frequency and the frequency sensitivity. (C) 2001 Elsevier Science B.V. All rights reserved.
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