In this World there seems to be an opposite for everything, now for this instance, I'm referering neurogenerative diseases. Some research I've seen seems to suggest, that if you aren't suffering from any neurodegenerative diseases, you can reverse the damage done by concussion through a healthy lifestyle by especially regular exercise, since it should stimulate this reversible regeneration in a lot of ways. Does this have some truth to it? That it's never too late if you aren't suffering from this? It's based off the fact, that if suffering from an illness, the brain won't be able to heal quick enough to cause a reversible effect, but otherwise it most likely will be capable of doing it. But then I ask, why is it some people won't regain all of their functions from one concussion, and even though they aren't suffering from any specific disease? Is it because they've been sufferers of multiple concussion syndrome, which in a way counts as an illness in itself? Or can it be because the severity of the concussion also caused chronic degeneration?

Your question is very confusing. You are trying to mix too many ideas.

Basically, neuro-regeneration does happen. But, it is very slow and not complete. It has little to do with other disease processes although they can have a minor impact. When you read about research, you need to be aware of the limited scope of that research.

The brain does not have the ability to regenerate large areas.

Are you trying to address issues specific to your concussion 7 years ago ?

What symptoms are you still struggling with ?

Well none other than that I am very sensitive to head rotation and leaning my head up against walls due to the resulting bump sometimes, I can get Dizzy but hope it's nothing serious. Other than that I can experience word finding issues on the cognitive level, difficulties with recalling words from my vocabulary, like I know what to say, but I just can't seem to find the word without struggling for a while. Usually happens if I divert from one language to another, I quickly forget and will first remember the word whenever I see/hear it again. Is this normal memory problems? Like for example, if I've been talking a foreign language for a week, then have to change back to English, I can get insecure talking due to trouble with remembering my potential vocabulary. Even though I am fluent in English, I can find myself only capable of using 25%. So what's going on? anxiety related?

The biggest problem anxiety can cause in daily life is an inability to focus. This can make it difficult to recall words or do other things because the mind is busy with the anxiety issues. There is a saying, "We need to stop to think." That means we needs to stop the other thoughts and distractions so we can focus on thinking about the issue at hand.

It appears you get caught up in the details. These details can cause quite a distraction and limit you ability to focus on the task at hand. This can be similar to ADD/ADHD.

A Neuro Psychologist can do tests to diagnose these issues. It is not uncommon for people with word finding and other cognitive issues to have them due to anxiety and/or depression. Those cognitive issues due to a brain injury usually have a bit of a different presentation.

Different presentation? Like, another form of memory failure? I imagine language is long term memory storage, which is not what usually fails, so it hopefully is anxiety. Been experiencing it before, and I imagine it still takes somewhat of a force to produce a concussion from leaning up a wall or bumping into it slightly or sort of lightly.

There is a specific system that allows recall and processing of words. I have suffered from word issues for decades. But, I have been able to maintain high levels of math processing. I have great recall in some areas but horrible recall in other areas.

You are confusing me. You mention word finding and such then flip to leaning against a wall. Word finding issues due to injury have no connection to whatever short term sensations/symptoms you manifest from leaning against a wall. Injury caused word finding problems tend to be chronic. Anxiety caused word finding will increase as anxiety increases and decrease as anxiety decreases and focus increases.

If you want to understand you own issues, you should see if you can get a Neuro Psych Assessment done. Then, you will have information you can use to move forward with your life. Until then, you will likely continue to spin with your anxiety about "what if this" and "what if that."