Post-traumatic stress disorder, or PTSD, is the result of a traumatic, often violent event, such as combat, sexual assault, or other physical abuse. When PTSD occurs, the mind creates a memory of the traumatic event, which is repeatedly recalled. When that traumatic memory is recalled, the body responds as if the event is being experienced again. The result can be anxiety and panic attacks, sleep disturbances, sweating, tunnel vision, and other symptoms that are tied to the body’s natural flight response. This repeated trauma recall depletes serotonin and dopamine in the brain.