Simon was playing soccer at a University of Houston match and collided with another player when trying to head the ball on a corner kick. He seemed disoriented and had a lot of pain in his head. I asked him some questions to check the degree of his injury. He recalled easily that he played for UH, that he was in the middle of a match against RICE, (BOOO!), his name, the date, and where he lived currently. However, he had difficulty remembering where he grew up, childhood friends, his favorite childhood toy, or other events from his childhood. How would you diagnose Simon