Hoping to unlock some of the mysteries of post-traumatic stress disorder in children, a Stanford University researcher looked inside their heads.
What Dr. Victor Carrion found was startling: Children with PTSD and exposure to severe trauma had smaller brains.
Carrion found a nearly 9 percent reduction in the size of the hippocampus, a horseshoe-shaped sheet of neurons that deals with memory and emotions.
The study, released earlier this year, was just a first step toward understanding the physical effects of trauma and why some children have a greater ability to ward off physical and mental reactions.