Abstract
We study a class of planar integrate and fire models called adaptive integrate and fire (AIF) models, which possesses an adaptation variable on top of membrane potential, and whose subthreshold dynamics is piecewise linear . These AIF models therefore have two reset conditions, which enable bursting dynamics to emerge for suitable parameter values. Such models can be thought of as hybrid dynamical systems. We consider a particular slow dynamics within AIF models and prove the existence of bursting cycles with N resets, for any integer N. Furthermore, we study the transition between N- and \((N+1)\)-reset cycles upon vanishingly small parameter variations and prove (for \(N=2\)) that such transitions are organised by canard cycles. Finally, using numerical continuation we compute branches of bursting cycles, including canard-explosive branches, in these AIF models, by suitably recasting the periodic problem as a two-point boundary-value problem .
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Acknowledgements
SR was supported by Ikerbasque (The Basque Foundation for Science), by the Basque Government through the BERC 2018-2021 program and by the Ministry of Science, Innovation and Universities: BCAM Severo Ochoa accreditation SEV-2017- 0718 and through project RTI2018-093860B-C21 funded by (AEI/FEDER, UE) with acronym “MathNEURO”.
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Desroches, M., Kowalczyk, P. & Rodrigues, S. Spike-adding and reset-induced canard cycles in adaptive integrate and fire models. Nonlinear Dyn 104, 2451–2470 (2021). https://doi.org/10.1007/s11071-021-06441-z
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DOI: https://doi.org/10.1007/s11071-021-06441-z