do concussions really make you lose brain cells, or something?

cause i've hit my head so many times in my lifetime, mostly when i was a kid. all kinds of accidents. some bled. some didn't. either way, i don't feel like it ever effected my intelligence or my brain or behavior. or...did it? i've had 6 head injuries, at least. several of which were concussions. mostly when i was a kid. and adolescent. and a few as an adult.
like what?
thanks.
 
Back
Top