"In PTSD, individuals have specific memories with specific associations attached to them, which are negative, and thereby causing the disorder," he explains . "What we think behavioral and cognitive therapies do by having patients replay those memories and talk about them is that exact third memory stage. Over time, there may be the chance for these patients to redefine their memories and make them less traumatic."
Sounds similar to what happens with the Rewind Technique, or VK dissociation, except of course, as these techniques keep the subject relaxed, the 're-processing' can happen more quickly.
PTSD treatment and memory research