Our brains are the control centers of our bodies, so it's not surprising that when they get hurt, many different parts of our bodies can be affected. Traumatic brain injury might happen when someone hits her head or when the brain doesn't get enough oxygen. Kids with traumatic brain injury might have trouble remembering things or moving their muscles as easily as they did before their injury, and this can be very frustrating and scary. Their friends and families often find it scary as well, because it sometimes seems like the person they knew has changed so much she isn't the same person anymore. But even though she has changed in a lot of ways, she can still use understanding and friendship from the people around her