CHEMICALS AND PULSES. “Cells in close spatial proximity to one another eventually synchronise, resulting in multiple ‘competing’ pulse centres. As some oscillatory centres accumulate more cells by chance, cAMP concentrations in the surrounding areas increase, causing oscillatory centres to pulse at a faster rate, thereby releasing more cAMP into the environment.”
https://academic.oup.com/femsre/article/40/6/798/2400841