I had pretty severe concussion problems throughout high school and college football. Eventually forcing me to leave the program last year. I've even stayed in hospitals from a couple of them and undergone about every test they could bill the college. I had 7 documented in about 4 years
The only effect my family has noticed in day to day activities is my newer inability to remember small things like running errands and conversations from earlier in the day. But as for more important things I seem to have a pretty good grasp on everything.