Study reveals how brain injury can lead to post-traumatic stress disorder. UCLA team finds that the brain processes fear differently after injury.
Post-traumatic stress disorder in U.S. military members frequently follows a concussion-like brain injury. Until now, it has been unclear why. A UCLA team of psychologists and neurologists reports that a traumatic brain injury causes changes in a brain region called the amygdala; and the brain processes fear differently after such an injury.