I did Neurofeedback for about 15 sessions approx. in the beginning. I did it in 2 months after my TBI which may be too soon according to the research this MD did a few years ago. (Mary Lee Esty, Ph.D., LCSW)

Still I saw some instant benefit but didn't last longer. Immediately after the therapy my fatigue goes down a lot, my bad smell went down (I have smell disorder after my TBI), even my head ache went down a little.

I am thinking of doing it again but I am not sure I can drive that far in D.C. traffic.

http://www.brainwellnessandbiofeedback.com/

Some people reported negative effects like seizures etc., if it is non-volitional and it is intrusive in a sense they work on your brain waves. Just do your research and see if the MD has experience to treat TBI/PCS. And it is not cheap and not covered by Insurance.