To overcome some limits of classical neuronal models, we propose a Markovian generalization of the classical model based on Jacobi processes by introducing downwards jumps to describe the activity of a single neuron. The statistical analysis of inter-spike intervals is performed by studying the first-passage times of the proposed Markovian Jacobi process with jumps through a constant boundary. In particular, we characterize its Laplace transform which is expressed in terms of some generalization of hypergeometric functions that we introduce, and deduce a closed-form expression for its expectation. Our approach, which is original in the context of first passage time problems, relies on intertwining relations between the semigroups of the classical Jacobi process and its generalization, which have been recently established in [11]. A numerical investigation of the firing rate of the considered neuron is performed for some choices of the involved parameters and of the jumps distributions.

Jacobi Processes with Jumps as Neuronal Models: A First Passage Time Analysis

D’Onofrio, Giuseppe
;
Patie, Pierre;Sacerdote, Laura
2024-01-01

Abstract

To overcome some limits of classical neuronal models, we propose a Markovian generalization of the classical model based on Jacobi processes by introducing downwards jumps to describe the activity of a single neuron. The statistical analysis of inter-spike intervals is performed by studying the first-passage times of the proposed Markovian Jacobi process with jumps through a constant boundary. In particular, we characterize its Laplace transform which is expressed in terms of some generalization of hypergeometric functions that we introduce, and deduce a closed-form expression for its expectation. Our approach, which is original in the context of first passage time problems, relies on intertwining relations between the semigroups of the classical Jacobi process and its generalization, which have been recently established in [11]. A numerical investigation of the firing rate of the considered neuron is performed for some choices of the involved parameters and of the jumps distributions.
2024
84
1
189
214
https://arxiv.org/pdf/2205.08237.pdf
https://epubs.siam.org/doi/abs/10.1137/22M1516877?journalCode=smjmap
Jacobi process, first passage time, non-local Wright-Fisher process, intertwining relations, Markov semigroups, infinitesimal generators, neuronal modeling.
D’Onofrio, Giuseppe; Patie, Pierre; Sacerdote, Laura
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1954817
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