Every doctor will tell you that your brain damage is permanent and unchanging, meaning you'll always have the same set of symptoms, if you had an IQ before of 120 and now after your injury it's 100, no amount of training will allow you to bridge that gap to your previous level. However, it's been my experience that I can have better days and very bad days. Can brain injuries really be explained as an isolated event with a predictable outcome? Wouldn't it be better to describe brain injury as a disease like MS is? I do not wake up every morning feeling predictably refreshed and alert, rather sometimes I wake up feeling very groggy and my brain feels swollen on one side and other times I feel stronger, but my level of consciousness/alertness is extremely variable. I don't know what causes this, it feels like when I was in hospital, except that was 13 years ago. The only way for me to wake up in this state is to do about 30 mins of spinning after which I feel more alert and probably would perform better on an IQ test than I would otherwise. Aside from that, first thing in the morning my speech is usually slurred, if I then practice reading a book aloud by the end of the day my speech will no longer be as slurred. Then if I withdraw and don't speak to anyone for a lengthy period, my speech production/articulacy will take a turn for the worse. What is going on here, surely we can't call brain injury a permanent phenomena. But neurons that have died aren't replaced, so what causes me to improve so rapidly in a day? More questions that answers here.