My Project was about Concussion and how I was traumatized by my concussion. So the difference between a person who has a concussion and who doesn't have a concussion is almost everything. Without a concussion your brain functions really well and there is no damage to your brain. With out a concussion your not as sensitive to bright lights or loud noises and you can focused better on stuff, and your not as forgetful. But with a concussion it's almost like if it's the complete opposite of those things. With a concussion your sensitive to bright light and loud noises. With a concussion you also tend to forget stuff that you shouldn't be forgetting. And your not able to focused as well as you normally would and you have headaches to when you have a concussion.