Hello and welcome pono,

I don't know if you have considered this but since you mention serious head injuries/concussions/car wrecks, I would like to give you some chiropractic links that explain about the C1/C2 adjustments/alignments.
It may not solve all your problems but it may help with some of the symptoms.

may be of help-
Postural work/info
http://www.somaticsplus.com/ws2.html
http://www.om-rehab.com/treatments.htm
http://www.sportsinjurybulletin.com/...acic-spine.htm

Chiropractic care info- a good one can help with many symptoms:
http://www.upcspine.com/self.htm
http://www.uppercervical.org/subpag...b/about_faq.php
http://www.spineuniverse.com/index.html
http://www.coloradochiropractic.org/.../glossary.html

Anatomy links
http://www.gwc.maricopa.edu/home_pag...rial_Small.htm
http://www.gwc.maricopa.edu/class/bi...cle/mustut.htm
http://www.meddean.luc.edu/lumen/Med...em/learnit.htm
http://mywebpages.comcast.net/wnor/homepage.htm

ART-active release technique
http://www.google.com/search?client=...=Google+Search

Naturopathy/Homeopathy
http://www.abchomeopathy.com/simplified.php
http://www.hmedicine.com/news/guide/single/singles/all
http://www.webhomeopath.com/en/jsp/login.jsp

and our main page link for all forum topics-
http://neurotalk.psychcentral.com/index.php