and most x-rays and mris will not show this injury.. this applies even to you mark in idaho if you are reading this,
what you need is something called digital motion x-ray,normal x-rays cannot show it and niether can a ct or a mri infact. thats why most people who have this injury never find out..
https://www.youtube.com/watch?v=QJqbGCVCwvM
it could be your neck and not your brain..
i discovered i have this injury after 7 months of hell..
every time you smash your head you also smash your C1 the risk of seriously hurting your neck is a posibility ....