Hmmm, lets see. There was the car accident where I had a concussion that lead to a coma, there was the time I was hit in the temple with the hook end of a hammer(accidentally) there was the 3 ODs that lead to seizures, the time my ex hit me so hard I couldn't hear for 2 weeks and then there was the overuse of psych meds.
The last job I had the overall manger asked me if I had a TBI becouse of the symptoms she saw in me. I do know that I sometimes get stuck on simple words and can't remember what they mean, or spell them( think; or, oar, ore )but I can recall more complex words. My hand-eye coordination was off for a while but has gotten better plus I don't drop things as much as I used to. I am able to do more than one thing at a time again.
I do believe the brain can heal but you gotta help it by eating right, getting enough sleep and keeping it active. But mostly you gotta stop getting hit on the head.