abuse addiction alcoholism brain combat körpererfahrung mentalhealth mindandbody neurology neuroplasticity neuroscience neurowissenschaften physiopathology post-traumatic post-traumaticstressdisorder posttraumatischesstresssyndrom psychictrauma psychischestrauma psychotherapie sexualabuse sexualtrauma stressdisorders therapie therapy traumasurvivors treatment veterans violence