Researchers are learning more about how traumatic events may physically change our brains. Neurologists have revealed changes to a brain mechanism used for learning and survival may play a role in how someone responds to a threat following a traumatic experience. Another study found that another mechanism responsible for emotion and memory is impacted and may make it difficult for someone with PTSD to discriminate between safety, danger, or reward. It overgeneralizes towards danger. These findings could significantly advance future treatments.