Acute stress disorder

Acute stress reaction (also called acute stress disorder or simply shock) is a psychological condition arising in response to a terrifying event."Acute Stress Response", was first described by Walter Cannon in the 1920s as a theory that animals react to threats with a general discharge of the sympathetic nervous system. The response was later recognized as the first stage of a general adaptation syndrome that regulates stress responses among vertebrates and other organisms.
See more at Wikipedia.org...

Acute stress disorder is an anxiety disorder characterized by a cluster of dissociative and anxiety symptoms [more]Acute stress disorder - Community and Resources