On the interspike-intervals of periodically-driven integrate-and-fire models |
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Authors: | Wacław Marzantowicz Justyna Signerska |
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Affiliation: | 1. Faculty of Mathematics and Computer Sci., Adam Mickiewicz University of Poznań, ul. Umultowska 87, 61-614 Poznań, Poland;2. Institute of Mathematics, Polish Academy of Sciences, ul. ?niadeckich 8, 00-656 Warszawa, Poland |
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Abstract: | We analyze properties of the firing map, which iterations give information about consecutive spikes, for periodically driven linear integrate-and-fire models. By considering locally integrable (thus in general not continuous) input functions, we generalize some results of other authors. In particular, we prove theorems concerning continuous dependence of the firing map on the input in suitable function spaces. Using mathematical study of the displacement sequence of an orientation preserving circle homeomorphism, we provide a complete description of regularity properties of the sequence of interspike-intervals and behaviour of the interspike-interval distribution. Our results allow to explain some facts concerning this distribution observed numerically by other authors. These theoretical findings are illustrated by computational examples. |
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Keywords: | Neuron models Integrate-and-fire Interspike intervals Leaky integrator Perfect integrator Displacement sequence |
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