Background: Patients with posttraumatic stress disorder (PTSD) show a reliable increase in
PTSD symptoms and physiological reactivity following exposure to traumatic pictures and
sounds. In this study neural correlates of exposure to traumatic pictures and sounds were
measured in PTSD. Methods: Positron emission tomography and H2 [15O] were used to
measure cerebral blood flow during exposure to combat-related and neutral pictures and
sounds in Vietnam combat veterans with and without PTSD. Results: Exposure to traumatic …