I had a head injury in March '93, major concussion, no seat belt, 40 mph, my idiocy basically. Since then I can remember everything pretty well since that point in time, but nothing before. Has this happened to anybody else? it came to light during high school reunion where most people knew a lot of details except for me. People, pre-1993 come up to me all the time in my small town and I have no idea of who they are. Post-1993 people, I have a very good memory of. Is the brain like a hard drive, when damaged, loses data? Apparently I recovered since I have an OK memory now, but only involving things after that accident. It's as if I got a new brain and started all over. Another thing, I was right handed before the accident in everything, but now I have a tendency towards being left handed in many things.