It's usually an injury that doesn't necessarily involve a long loss of consciousness, it can be someone who hit their head. Usually there is an associated loss of consciousness, but these people, they find themselves just a little different. People around them say, "You're a little different." Maybe you're short tempered, maybe you forget words, things that are aren't ... They're kind of subtle, but they're still very sever, and they can impact your life greatly, and it's very important to get the proper expertise to bear, to look at these things, analyze them, use rehabilitation techniques, and try to recover as best you can.
