I am new to this website, so i will introduce my self. i have had seizures for the past 29 years. My seizures are in my left hippocampus. I have always had concerns about having surgery, but Recently my doctor informed me of a new type of surgery called MRI guided laser ablation. I am considering having this done since it is not as major surgery, but I would like to be sure that the tissue they remove is not usable. Does anybody know how they can tell that I don't use any of my left hippocampus?