As I stated, A research study in the 70's shows that there is residual damage after the concussion appears to have resolved. This is not a hypothesis.

Unless there is some miraculous discovery with stem cells or other ways to spur neurogenesis beyond what happens naturally, I doubt there will be any clinical trails of treatment protocols. There are too many variables to organize a cohort of subjects with similar injuries.

Either way, the costs for such treatments will be a major cause for denial by insurance companies.

There are current diagnostic tools that are accurate. They are just not accepted by the medical establishment in many cases. They do not change the treatment options in most cases.

They already can test different protocols with live in vitro brain tissues. I've seen these tests. They are very interesting but I have not seen anything promising. They can watch the axons and dendrites make connections under different conditions. It did not appear they could influence these processes.

Since research is funded by either a drug company or the government, there must be a large population to serve to justify the costs.