Abstract
Traveling phase waves are commonly observed in recordings of the cerebral cortex and are believed to organize behavior across different areas of the brain. We use this as motivation to analyze a one-dimensional network of phase oscillators that are nonlocally coupled via the phase response curve (PRC) and the Dirac delta function. Existence of waves is proven and the dispersion relation is computed. Using the theory of distributions enables us to write and solve an associated stability problem. First and second order perturbation theory is applied to get analytic insight and we show that long waves are stable while short waves are unstable. We apply the results to PRCs that come from mitral neurons. We extend the results to smooth pulse-like coupling by reducing the nonlocal equation to a local one and solving the associated boundary value problem.





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This work was supported by National Science Foundation Grants, DMS1712922, DMS1951099.
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Ding, Y., Ermentrout, B. Traveling waves in non-local pulse-coupled networks. J. Math. Biol. 82, 18 (2021). https://doi.org/10.1007/s00285-021-01572-8
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DOI: https://doi.org/10.1007/s00285-021-01572-8