Wowzers...lots of stuff to look at. I'll have to organize all of the different tests and results to maybe begin to answer your questions, but keep in mind I am N.O.T. a medical person now, although I used to be fairly fluent in medical lingo, understood quite a bit. Somehow after my seizure that part of my reasoning is gone from inside the ole brain and now I can barely say some of the terms out loud (although I have no problem reading or writing them). Thanks for the links!
edited to add: I didn't know there were different types of mri. I've had them done on lower back, right foot (pain is worst there).