Chris, I thought you would be interested in this article concerning head trauma research of youth.
http://app.nationalproduction.wgbh.org/e/es.aspx?s=2531&e=588138&elqTrackId=87bceb0e8d45455b8e6ff9d7c932edc8&elq=8c7ff0763580487bbb6630ee3998bdce&elqaid=4427&elqat=1
I hope I did this correctly...