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      Assessing Trauma-Related Dissociation in Forensic Contexts: Addressing Trauma-Related Dissociation as a Forensic Psychologist, Part II

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          Emotion modulation in PTSD: Clinical and neurobiological evidence for a dissociative subtype.

          In this article, the authors present evidence regarding a dissociative subtype of PTSD, with clinical and neurobiological features that can be distinguished from nondissociative PTSD. The dissociative subtype is characterized by overmodulation of affect, while the more common undermodulated type involves the predominance of reexperiencing and hyperarousal symptoms. This article focuses on the neural manifestations of the dissociative subtype in PTSD and compares it to those underlying the reexperiencing/hyperaroused subtype. A model that includes these two types of emotion dysregulation in PTSD is described. In this model, reexperiencing/hyperarousal reactivity is viewed as a form of emotion dysregulation that involves emotional undermodulation, mediated by failure of prefrontal inhibition of limbic regions. In contrast, the dissociative subtype of PTSD is described as a form of emotion dysregulation that involves emotional overmodulation mediated by midline prefrontal inhibition of the same limbic regions. Both types of modulation are involved in a dynamic interplay and lead to alternating symptom profiles in PTSD. These findings have important implications for treatment of PTSD, including the need to assess patients with PTSD for dissociative symptoms and to incorporate the treatment of dissociative symptoms into stage-oriented trauma treatment.
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            Sexual revictimization: a review of the empirical literature.

            This article reviews the literature on sexual revictimization, covering approximately 90 empirical studies and includes a discussion of prevalence, risk factors, and correlates of sexual revictimization. Research suggests that two of three individuals who are sexually victimized will be revictimized. The occurrence of childhood sexual abuse and its severity are the best documented and researched predictors of sexual revictimization. Multiple traumas, especially childhood physical abuse, and recency of sexual victimization are also associated with higher risk. There is preliminary evidence that membership in some ethnic groups or coming from a dysfunctional family places an individual at a greater risk. Revictimization is associated with higher distress and certain psychiatric disorders. People who were revictimized show difficulty in interpersonal relationships, coping, self-representations, and affect regulation and exhibit greater self-blame and shame. Existing research on prevention efforts and treatment is discussed. More longitudinal studies on sexual revictimization are needed.
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              Trauma exposure and posttraumatic stress disorder in a national sample of adolescents.

              Although exposure to potentially traumatic experiences (PTEs) is common among youths in the United States, information on posttraumatic stress disorder (PTSD) risk associated with PTEs is limited. We estimate lifetime prevalence of exposure to PTEs and PTSD, PTE-specific risk of PTSD, and associations of sociodemographics and temporally prior DSM-IV disorders with PTE exposure, PTSD given exposure, and PTSD recovery among U.S. adolescents. Data were drawn from 6,483 adolescent-parent pairs in the National Comorbidity Survey Replication Adolescent Supplement (NCS-A), a national survey of adolescents aged 13 through 17 years. Lifetime exposure to interpersonal violence, accidents/injuries, network/witnessing, and other PTEs was assessed along with DSM-IV PTSD and other distress, fear, behavior, and substance disorders. A majority (61.8%) of adolescents experienced a lifetime PTE. Lifetime prevalence of DSM-IV PTSD was 4.7% and was significantly higher among females (7.3%) than among males (2.2%). Exposure to PTEs, particularly interpersonal violence, was highest among adolescents not living with both biological parents and with pre-existing behavior disorders. Conditional probability of PTSD was highest for PTEs involving interpersonal violence. Predictors of PTSD among PTE-exposed adolescents included female gender, prior PTE exposure, and pre-existing fear and distress disorders. One-third (33.0%) of adolescents with lifetime PTSD continued to meet criteria within 30 days of interview. Poverty, U.S. nativity, bipolar disorder, and PTE exposure occurring after the focal trauma predicted nonrecovery. Interventions designed to prevent PTSD in PTE-exposed youths should be targeted at victims of interpersonal violence with pre-existing fear and distress disorders, whereas interventions designed to reduce PTSD chronicity should attempt to prevent secondary PTE exposure. Copyright © 2013 American Academy of Child and Adolescent Psychiatry. Published by Elsevier Inc. All rights reserved.
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                Author and article information

                Journal
                Psychological Injury and Law
                Psychol. Inj. and Law
                Springer Science and Business Media LLC
                1938-971X
                1938-9728
                December 2017
                December 20 2017
                December 2017
                : 10
                : 4
                : 298-312
                Article
                10.1007/s12207-017-9305-7
                c95a5944-5a48-426c-b961-33c0c4089da4
                © 2017

                http://www.springer.com/tdm

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