Brett Brachmann, aged 22 is a senior in college. He’s majoring in chemistry. Brett has always been active in athletics. He played basketball, soccer, and tennis in high school. He enjoys running and competing in road races. Brett has come to your office because lately he has felt a bit more tired than usual and has felt some weakness in his legs. Twice this past month during a run, the toe of his shoe caught the road and he fell and skinned himself up. He has noticed an occasional but worrisome hand tremor and he doesn’t feel like his handwriting is as neat as it once was. He isn’t sure, if it’s just stress of advanced physical chemistry, but he feels he’s having a harder time remembering things for school. What really made him decide to come to see you was that he began seeing double the other day while studying with his girlfriend.