Link: http://www.npr.org/sections/health-shots/2016/09/26/495074707/war-studies-suggest-a-concussion-leaves-the-brain-vulnerable-to-ptsd

By Jon Hamilton
September 26, 2016

There's growing evidence that a physical injury to the brain can make people susceptible to post-traumatic stress disorder.

Studies of troops who deployed to Iraq and Afghanistan have found that service members who have suffered a concussion or mild traumatic brain injury are far more likely to develop PTSD, a condition that can cause flashbacks, nightmares and severe anxiety for years after a traumatic event.