A new study has suggested that in some cases, post-traumatic stress disorder (PTSD) might not just have a psychological effect on the brain, but could also have a physical one.
Brain analysis of 89 military servicemen, all of whom had survived traumatic brain injuries and 29 who were diagnosed with significant PTSD, showed that the part of the brain that helps control emotion may be larger in people who develop PTSD
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http://www.iflscience.com/brain/ptsd-might-have-a-physical-effect-on-the-brain-as-well-as-psychological/
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