Totally different injuries, so i dont know if this gives hope.
I have a 10 year old head injury that has Blown Away conventional science that the first 2 years is IT for healing.
Latest change for the better was at the 7 year mark.
Last 3..meh :)
I would think it’s easier to fix leg injuries (hip replacements, knee replacements, etc.) than head injuries.
Your mind seems fine though ;^)