• December 28, 2014

Research links PTSD, veterans’ concussions

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Posted: Monday, December 16, 2013 4:30 am

Up to a fifth of U.S. service members who served in Iraq and Afghanistan have come home with a blast-related concussion or post-traumatic stress disorder — or both.

A new study published in the journal JAMA Psychiatry helps detail the relationship between the two conditions.

Marines who suffered mild traumatic brain injuries while deployed were roughly twice as likely to get PTSD, the researchers found.

One likely explanation is that the bomb blasts, the most common cause of brain injuries during the wars, are psychologically traumatizing as well.

In addition, structural changes in the brain after a head injury may increase the likelihood of developing PTSD and decrease the chances of recovery, said Dr. Dewleen Baker, a co-author of the study and research director at the Veterans Affairs Center of Excellence for Stress and Mental Health in San Diego.

The study followed 1,648 Marines from four battalions in Southern California as they deployed to war and returned between 2008 and 2012.

As part of the study, which was published Wednesday, each Marine was assessed for PTSD and other mental health issues a month before deployment, and then again three to six months after returning.

A total of 327 Marines — about 20 percent — reported having suffered at least one traumatic brain injury during their deployment.

Not surprisingly, Marines who were already suffering from PTSD when they went to Iraq or Afghanistan, and then saw intense combat, had the highest risk of testing positive for PTSD once they came home.

Adding a brain injury raised the risk from 23 percent to 34 percent.

At the other extreme — Marines who were deployed without pre-existing mental health problems and experienced minimal combat — the risk of developing PTSD was minimal, with or without a brain injury. Most of the Marines fell somewhere in the middle.

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