Jonah Lehrer examines why new treatments for PTSD, like ecstasy, can work better than critical incident stress debriefing (talking it out), known as CISD:
[B]ecause our memories are formed by the act of remembering them, controlling the conditions under which they are recalled can actually change their content. The problem with CISD is that the worst time to recall a traumatic event is when people are flush with terror and grief. They’ll still have all the bodily symptoms of fear—racing pulse, clammy hands, tremors—so the intense emotional memory is reinforced. It’s the opposite of catharsis. But when people wait a few weeks before discussing an event—as Mitchell, the inventor of CISD, did himself—they give their negative feelings a chance to fade. The volume of trauma is dialed down; the body returns to baseline. As a result, the emotion is no longer reconsolidated in such a stressed state. Subjects will still remember the terrible event, but the feelings of pain associated with it will be rewritten in light of what they feel now.
The Dish 