“People who suffer repeated head injuries often exhibit signs of aggression, childishness, impaired self-control, inappropriate sexual activity and alcohol abuse, according to the National Institutes of Health.”
“It’s conceivable to think that there is a possibility that those concussions have led to some behavioral issues. The question I pose is simple: Can someone with several chronic or repetitive head injuries later display behavior that is socially undesirable?”
Pittsburgh media tackles the question of whether Big Ben is a moron because of hits to the brain or because he’s always been a creepy douche.
[Is Roethlisberger's brain trauma at fault for recent behavior? - Tribune-Review]