This may have no relation to what you guys are talking about but I have suffered from Migraines for years and just found out I have Celiac disease. I'm gluten intollerant. I've only had a couple migraines after long, hot rides but I suffer from them because of my diet. Have to do away with any wheat flour, oats, barley, pasta... I used to have as many as 3 or 4 major ones a week but now may only have one a month if that. They don't know how it's connected to migraines but it sure has helped changing my diet to control it.
Mark