Yea— Well, guess we will never know if he suffered brain damage from that concussion, because of the lack of technology to see inside the brain. I wonder if he had trouble seeing or remembering stuff after that incident..
Perhaps this guy has done some useful analyses of Lincoln’s health, I am not sure...
http://doctorzebra.com/prez/g16.htm
When he came to, after being unconscious overnight, he completed the sentence he was uttering when the horse kicked him.
http://www.findingdulcinea.com/news/history/2012/Abraham-Lincoln-Facts.html