Hi Debbie. My son, now 13, did suffer a stroke(from TBI) @ age 5...then subsequent Epilepsy surgery to resolve seizure disorder. Last summer, he rode soarin and RRC. NO problems on Soarin. RRC freaked him out a bit---I think the "take off" was too much. HOWEVER, he is determined to ride it when we return in March. We did not try MS--I was not that brave--but plan to in March. For us, if I can "prepare" him for what will happen on the ride he does much better. Unfortunately, that was the first time at WDW for both of us...I wasn't much help. On Soarin, I pointed out that the ceiling was within sight, therfore, we could not be moving (like it feels). He had time to take in his surroundings, I was sitting right by him and talking him thru each scene (reminding him---it just "feels" like we are doing that)
By the way...Thunder Mtn RR was his favorite.
Best Wishes!