Overview
Traumatic Brain Injury (TBI) and Post-Traumatic Stress Disorder (PTSD) have been called the "signature injuries" of the military conflicts in Iraq and Afghanistan.
According to a 2008 study by the RAND Corporation:
People often group TBI and PTSD together because of their prevalence, and because they often co-exist in returning Service Members. However, TBI and PTSD are very different - TBI is a physical injury, while PTSD is a psychological health injury.