IDk. I hope this is accurate. I can say from anecdotal experience, I had a concusssion as a 10 year old, then two more playing football in high school (I played the next week, this was right before all th CTE stufff blew up). I never had issues growing up, but despite have an iq or 140, I forgot names of people I’ve known forever, frequently forget what day it is, can be extremely impulsive, struggle with severe anxiety and depression. Seems like something happened. Then again, mental health issues run in my family. So, idk. Certainly seems and feels like something changed.
Spoke to a friend I played football with who went on to play in college. He feels the same way.