Survival versus collapse: abrupt drop of excitability kills the traveling pulse, while gradual change results in adaptation.

Abstract

Excitable media show changes in their basic characteristics that reflect temporal changes in the environment. In the photosensitive Belousov-Zhabotinsky (BZ) reaction, excitability is decreased by illumination. We found that a traveling pulse failed to propagate when a certain level of light intensity was switched on abruptly, but the pulse continued… (More)

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