dr. loganhe would like to see this comprehensive approach migrate throughout civilian care, not just at major metropolitan trauma centers, he also thinks there would be other implications for treating brain disorders. can you re-train a brain that may be suffering from alzheimer's or parkinson's? >> we believe you can, barbara. and you do that by exercising the part of the brain which is responsible for that function. >> you're not saying you can cure these diseases, to be clear. >> not at all. not at all. what we're saying is we can slow, maybe even periods of rest, process of decline in that area of the brain. >> reporter: low can says there's no reason this type of therapy would work only for soldiers. it could help drug addicts and alcoholics recover brain function. when it comes to changing the brain and behavior, he says, counseling just isn't enough. >> sit with us for a little while. join the circle. >> circle of trust here? >> reporter: at the end of it all, aaron sits down for his eva