If I am wrong, then there is a major contradiction between theory and experiment in this area. It seems curiously uniform. If this is really true, we have something fundamental to learn. Modeling a new gas-phase excitable medium based on phosphorescence. Checking the result from extensive numerical solutions of partial differential equations of reaction and diffusion, that the period of the spiral wave gravitates to the tangent from the origin to the curve describing the propagation speed of periodic wavetrains.
Computations show an exceedingly curious complex frequency spectrum.
Comparing theory based on meander and hyper-meander to observations in heart muscle during fibrillation, for the intervals between successive arrivals of an activation front at an arbitrary electrode site. This uses data from experiments unforeseen when this present proposal was written. F.X.Witkowski and I did these experiments on dog hearts in 1994. Attempting a derivation of the AC electrical threshold for inducing fibrillation in the heart. I did this successfully for DC shocks several years ago, but did not know how to think about the physiological impact of AC electricity until recently.