I'm pretty sure that I've seen on TV that the brain waves in your son's head can be observed. Migraine headaches do cause activity in the brain. But, as with the other letter this morning, keep track of all the foods he is eating. The majority of migraine headaches are CAUSED by food. There is a list of the foods which cause migraines; ask your doctor to provide it. Does your son respond to pictures? Pictures of an adult suffering from a bad headache? From a magazine?