Spreading depression, the most likely cause of migraine aura and pain, propagates at the unique speed of 3 millimeters a minute. The causes for this brain event are beginning to be understood. The fact that the brain of migraineurs is more excitable than normal takes on added importance when one considers a fascinating chemical reaction that can be demonstrated in a Petri dish. The reaction is called a Belousov-Zhabotinsky reaction. https://www.youtube.com/w...
