Thankfully, the MRIs showed nothing wrong, and we later found the cause of the headaches to be my murderous car emitting carbon monoxide into the cabin. But one good thing did come out of the whole experience: I now have a complete series of MRIs showing my real, actual brain. I'd like to show them to you (and maybe try to remember some random neuroanatomy facts).
http://dustincurtis.com/a-tour-of-my-brain.html