A research company has received a grant of almost $ 9 million to study the effects of brain injuries of deployed servicemen.  One reason is because the symptoms of a concussion may not be obvious, while things such as slower reaction time and memory impairments may persist.  Similar to the high school proposal for testing of athletes who have suffered a head injury, this commitment by the military exhibits an understanding that the effects of head injury can be very subtle, and return to any kind of active duty/sport should be approached with extreme caution in any circumstance.  For the full article regarding the military study, please click on the following link:

http://www.defenseindustrydaily.com/89M-to-Eyak-for-Brain-Injury-Testing-for-Deploying-US-Troops-05592/