A person’s pupils may be of different sizes (anisocoria) for several reasons, including physical trauma, response to light, and infection. The condition may also be present from birth.

People with a more active amygdala (an area in the brain involved in processing information relevant to threats) are more likely to develop PTSD symptoms after experiencing trauma than people with a ...

Recovery from PTSD comes with key changes in the brain’s memory system, a new study finds. These differences were found in the brains of 19 people who developed post-traumatic stress disorder ...