since May 2010 after an amusement park ride my has has this cyclic brain disorder. Every two weeks he goes into episodes and he becomes like a child, he feels everything is like a dream, he ca not process information, talking, watching, hearing is difficult for him. between episodes he is perfectly normal. each episode takes about 8-10 days. have done tons of test and all came back negative. have been to many doctors, two times to Mayo with no answer. please help me if you have seen something like this.