Check out www.tbilaw.com

There is a referral system available there. Attorney Gordon Johnson has some of the most complete mTBI information available to attorneys. He also has a web site called subtle brain injury. Check out http://subtlebraininjury.com/

He practices in Wisconsin.
Brain Injury Law Group
Attorney Gordon S. Johnson, Jr.
212 Whitetail Run Ln.
Sheboygan, WI
800-992-9447

I don't know if he handles Work Comp cases but he can be an excellent referral to other attorneys who do.