User:GabriellePasturel/Memory and trauma

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One meta-analysis found that individuals diagnosed with PTSD have significantly smaller hippocampi volumes compared to controls who do not have PTSD. Another meta-analysis found that in adults who experienced childhood trauma, the hippocampi were smaller than control hippocampi.

One study compared hippocampi sizes of United States Vietnam veterans and their civilian twin who did not have PTSD. The study found that, compared to controls, the hippocampi sizes were smaller in both the veteran and civilian twins.