As someone with significant TBI I can only pray for others..a lot of hard days man
I would highly recommend using a cold laser to help the brain heal. Do a search for TBI and Low Level Light Therapy, there are about 2,000 research articles. I work as a chiropractor, have plenty of motor vehicle accident patients. The cold laser is great. I use the TerraQuant brand, been extremely happy with them. TQ was bought by MultiRadiance, who then jacked the prices way up. Occasionally you can find a used one on ebay. Let me know if you want more info.
Acupuncture can also help, at least it does with MVA persons. Watching TV, movies, on the computer, these things hinder healing, as do bright lights. Listening to music apparently helps. One other thing, and this has been brought up before, is having a competent person realign the upper cervical section of the neck. Often my MVA patients cannot think, and the moment their atlas/C1 is realigned, they are back to their old selves.
Blood flow to the base of the brain is often reduced when C1 is out of alignment. This affects moods, thinking ability, the cranial nerves, etc. Maggot on SH tried this treatment, it helped him. Only problem is that adjusting this area and getting good results is not easy. Been doing this now for 15 years, and am finally getting good at it. The system I use is NUCCA, but there are some others that are okay as well.