[Compartida por Ana Prieto, a raíz de mi crónica sobre la migraña publicada en Revista Anfibia. Gracias!] Three, four, sometimes five times a month, I spend the day in bed with a migraine headache, insensible to the world around me. Almost every day of every month, between these attacks, I feel the sudden irrational irritation and the flush of blood into the cerebral arteries which tell me that migraine is on its way, and I take certain drugs to avert its arrival. If I did not take the drugs, I would be able to function perhaps one day in four. The physiological error called migraine is, in brief, central to the given of my life. When I was 15, 16, even 25, I used to think that I could rid myself of this error by simply denying it, character over chemistry. "Do you have headaches sometimes? frequently? never?" the application forms would demand. "Check one." Wary of the trap, wanting whatever it was that the successful circumnavigation of that particular form...