The Vietnam-era twin study suggests that a person with a smaller ________ was more likely to develop PTSD after a combat experience.

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The Vietnam-era twin study found that individuals with a smaller hippocampus were more likely to develop PTSD after combat experience. The hippocampus is a brain region that plays a crucial role in memory and emotion regulation – two processes that are disrupted in PTSD.

The Vietnam-Era Twin Study Suggests That a Person with a Smaller