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Austin Quan

Picture of Austin Quan.

Thesis

Noise, Delays, and Resonance in a Neural Network

Advisor
John Milton (Scripps)
Second Reader(s)
Darryl Yong

Abstract

A stochastic-delay differential equation (SDDE) model of a small neural network with recurrent inhibition is presented and analyzed. The model exhibits unexpected transient behavior: oscillations that occur at the boundary of the basins of attraction when the system is bistable. These are known as delay-induced transitory oscillations (DITOs). This behavior is analyzed in the context of stochastic resonance, an unintuitive, though widely researched phenomenon in physical bistable systems where noise can play in constructive role in strengthening an input signal. A method for modeling the dynamics using a probabilistic three-state model is proposed, and supported with numerical evidence. The potential implications of this dynamical phenomenon to nocturnal frontal lobe epilepsy (NFLE) are also discussed.

Proposal

Nocturnal Frontal Lobe Epilepsy: Metastability in a Dynamic Disease?

Additional Materials

Poster