Abstract
An alternative theoretical model that incorporates the experimentally measurable dispersion relation is used to study the curvature effect and the dynamics of spiral waves in two-dimensional excitable media. The model is constructed to abstract the most significant factors leading to phenomena observed universally in excitable media. The analytically derived curvature relation and critical radius show an excellent agreement with numerical simulations of the model. Both stationary rotating spirals and a meandering motion are observed numerically, in accord with other experimental and theoretical studies.
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