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- W4367692486 abstract "The use of high-frequency currents in neurostimulation has received increased attention in recent years due to its varied effects on tissues and cells. Neurons are commonly modeled as nonlinear systems, and questions such as stability can thus be addressed with well-known averaging methods. A recent strategy called interferential currents uses electrodes delivering sinusoidal signals of slightly different frequencies, and thus classical averaging (well-adapted to deal with a single frequency) cannot be directly applied. In this paper, we consider the one-dimensional FitzHugh-Nagumo system under the effects of a source composed of two terms that are sinusoidal in time and quadratically decaying in space. To study this setting we develop a new averaging strategy to prove that, when the frequencies involved are sufficiently high, the full system can be approximated by an explicit highly-oscillatory term plus the solution of a simpler -- albeit non-autonomous -- system. This decomposition can be seen as a stability result around a varying trajectory. One of the main novelties of the proofs presented here is an extension of the contracting rectangles method to the case of parabolic equations with space and time-depending coefficients." @default.
- W4367692486 created "2023-05-03" @default.
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- W4367692486 date "2023-04-28" @default.
- W4367692486 modified "2023-10-16" @default.
- W4367692486 title "Approximation and stability results for the parabolic FitzHugh-Nagumo system with combined rapidly oscillating sources" @default.
- W4367692486 doi "https://doi.org/10.48550/arxiv.2305.00123" @default.
- W4367692486 hasPublicationYear "2023" @default.
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