Often Post Traumatic Stress Disorder is associated with war veterans, police officers or others who've experienced acute violence. However, there are many types of trauma that can cause PTSD: witnessing a violent act, surviving a fire or a car crash, even losing a loved one. On a Science Café edition of the Sound of Ideas, we'll talk with a local psychology professor about how Post Traumatic Stress Disorder occurs, who commonly suffers from it, and why so many people don't get the treatment that may work best for them.