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14-September-2008 12:50:30 - Dissociation For other uses, see Dissociation chemistry and Dissociation neuropsychology. Dissociation is a state of acute mental decompensation in which certain thoughts, emotions, sensations, and/or memories are compartmentalized, diagnosed mostly in individuals with a history of trauma.12 Dissociative disorders are commonly precipitated by overwhelming stress.3 This stress may be provoked by seeing or experiencing an accident, a disaster or a traumatic event, including sexual abuse, and especially during childhood.34 Contents 1 History 2 Diagnosis 3 Relation to trauma and abuse 4 Psychoactive substances 5 See also 6 References 7 External links History The French psychiatrist Pierre Janet 1859-1947 initially coined the term splitting in his book L'Automatisme psychologique. There, he emphasized its role as a defensive mechanism employed in response to psychological trauma. While he considered dissociation an initially effective defense mechanism that protects the individual psychologically from the impact of overwhelming traumatic events, a habitual tendency to dissociate would likely be a marker of a more pronounced psychopathology. Carl Jung described pathological manifestations of dissociation as special or extreme cases of the normal operation of the psyche. This structural dissociation, opposing tension, and hierarchy of basic attitudes and functions in normal individual consciousness is the basis of Jung's Psychological Types.5 He theorized that dissociation is a natural necessity for consciousness to operate in one faculty unhampered by the demands of its opposite. Attention to dissociation as a clinical feature has been growing in recent years as knowledge of post-traumatic stress disorder increased, due to interest in dissociative identity disorder and the multiple personality controversy, and as neuroimaging research and population studies show its relevance.6 Diagnosis The DSM-IV considers symptoms such as depersonalization, derealization and psychogenic amnesia to be core features of dissociative disorders.7 However, in the normal population dissociative experiences that are not clinically significant are highly prevalent, with 60% to 65% of the respondents indicating that they have had some dissociative experiences.8 The SCID-D is a structured interview used to assess and diagnosis dissociation. Relation to trauma and abuse Dissociation has been described as one of a constellation of symptoms experienced by some victims of multiple forms of childhood trauma, including physical abuse and child sexual abuse.94 This is supported by studies which suggest that dissociation is correlated with a history of trauma.10 Dissociation appears to have a high specificity and low sensitivity to having a self-reported history of trauma.11 Symptoms of dissociation resulting from trauma may include depersonalization, psychic numbing, disengagement, or amnesia regarding the events of the abuse. It has been hypothesized that dissociation may provide a temporarily effective defense mechanism in cases of severe trauma; however, in the long term, dissociation is associated with decreased psychological functioning and adjustment.4 Other symptoms sometimes found along with dissociation in victims of traumatic abuse often referred to as sequelae to abuse include anxiety, PTSD, low self-esteem, somatization, depression, chronic pain, interpersonal dysfunction, substance abuse, self-multilation and suicidal ideation or actions.1249 These symptoms may lead the victim to erroneously present the symptoms as the source of the problem.9 Chu et al. 1999 reported that child abuse, especially chronic abuse starting at early ages, was related to high levels of dissociative symptoms in a clinical sample,13 including amnesia for abuse memories.14 Briere Runtz 1988 found increased levels of dissociation in a non-clinical sample of adult women who had been sexually abused by a significantly older person prior to age 15.15 Another non-clinical study by the same authors found that a history of childhood sexual abuse and especially a history of childhood physical abuse were predictive of dissociative symptoms, though they stated that the validity of the scale used to measure these symptoms was yet to be proven.16 The level of dissociation has been found to be related to reported overwhelming sexual and physical abuse.17 When severe sexual abuse penetration, several perpetrators, lasting more than one year had occurred, dissociative symptoms were even more prominent.17 The amount of dissociation that follows directly after a trauma predicts posttraumatic stress disorder PTSD.2 Individuals that are more likely to dissociate during a traumatic event are considerably more likely to develop chronic PTSD. 2 One study found that subjects who experienced early and/or recent trauma were more dissociative 18 In a review of clinical literature, Merckelbach and Muris 2001 argue that a causal link between trauma and dissociation has not been established and may not be true, due what they describe as at best, modest correlations in the literature, possibly obscured results due to uncontrolled confounding variables, and possible positive bias towards self-reports of trauma resulting due to symptoms of dissociation. 13 Fantasy proneness, which is itself linked to self-reported abuse, is at least as predictive of measured dissociation as self-reported trauma.192021 Merckelbach et al. 2004 questions the accuracy of self-reports of trauma by fantasy prone individuals, pointing to studies that found fantasy proneness to be related to overendorsement of implausible answers in surveys.22 Psychoactive substances Psychoactive substances can often induce a state of temporary dissociation. Substances with dissociative properties include ketamine, nitrous oxide, tiletamine, DXM, cannabis, PCP, 2C-B, salvia and ibogaine. 23 See also Psychology portal Altered state of consciousness Emotional detachment Splitting psychology Dissociative identity disorder References ^ Psychiatric Association 2000-06. Diagnostic and Statistical Manual of Mental Disorders DSM-IV TR Text Revision. Arlington, VA, USA: American Psychiatric Publishing, Inc., 943. doi:10.1176/appi.books.9780890423349. ISBN 978-0890420249. ^ a b c Brown, Scheflin and Hammond 1998. Memory, Trauma Treatment, And the Law. New York, NY: W. W. Norton. ISBN 0-393-70254-5. ^ a b Introduction: Amnesia and Related Disorders Merck Manual Home ion ^ a b c d Myers, John E.B. 2002. The APSAC Handbook on Child Maltreatment, Second ion. Sage Publications, p63. ISBN 0761919929. ^ Jung, C.G. 1991. Psychological types. Routledge London. ISBN 978-0710062994. ^ Scaer, Robert C. 2001. The Body Bears the Burden: Trauma, Dissociation, and Disease. Binghamton, NY: Haworth Medical Press, 97-126. ISBN 0-78901246-4. ^ Dissociative Disorders Diagnostic and Statistical Manual of Mental Disorders, Fourth ion ^ Waller, N.G.; Putnam, F.W.; Carlson, E.B. 1996. Types of dissociation and dissociative types: A taxometric analysis of dissociative experiences pdf. Psychological Methods 1 3: 300-321. doi:10.1037/1082-989X.1.3.300. Retrieved on 2008-01-31. ^ a b c Salter, Dr, Anna C.; Hilary Eldridge 1995. Transforming Trauma: A Guide to Understanding and Treating Adult Survivors. Sage Publications Inc, p220. ISBN 080395509X. ^ van der Kolk BA, Pelcovitz D, Roth S, Mandel FS, McFarlane A, Herman JL July 1996. Dissociation, somatization, and affect dysregulation: the complexity of adaptation of trauma. Am J Psychiatry 153 7 Suppl: 83-93. PMID 8659645. Retrieved on 2008-05-13. ^ Briere, J. 2006. Dissociative symptoms and trauma exposure: specificity, affect dysregulation, and posttraumatic stress, Journal of Nervous and Mental Disease, 194, 78-82. ^ John Briere, Department of Psychiatry, USC School of Medicine 1992. Methodological Issues in the Study of Sexual Abuse Effects. Journal of Consulting and Clinical Psychology Vol. 60. No. 2: p196-203. ^ a b Merckelbach H, Muris P March 2001. The causal link between self-reported trauma and dissociation: a critical review. Behav Res Ther 39 3: 245-54. PMID 11227807. Retrieved on 2008-05-13. ^ Chu, J; Frey L, Ganzel B, Matthews J May 1999. Memories of childhood abuse: dissociation, amnesia, and corroboration. American Journal of Psychiatry 156 5: 749-55. PMID 10327909. Retrieved on 2008-01-16. ^ Briere, J., Runtz, M. 1988. Symptomatology associated with childhood sexual victimization in a non-clinical adult sample. Child Abuse Neglect: The International Journal, 12, 51-59. ^ Briere, J., Runtz, M. 1990. Augmenting Hopkins SCL scales to measure dissociative symptoms: Data from two nonclinical samples, Journal of Personality Assessment, 55, 376-379. ^ a b Draijer, N; Langeland W March 1999. Childhood trauma and perceived parental dysfunction in the etiology of dissociative symptoms in psychiatric inpatients. Am J Psychiatry 156 3: 379-85. PMID 10080552. Retrieved on 2008-01-16. ^ Pearson, M.L. 1991. Childhood trauma, adult trauma, and dissociation. Dissociation 10 1: 58-62:. Retrieved on 2008-05-20. ^ Pekala, Ronald J. 2001 The importance of fantasy-proneness in dissociation: a replication, Contemporary Hypnosis, 184, 204-214. ^ Pekala, Ronald J.; Kumar, V. K.; Ainslie, George; Elliott, Nancy C.; Mullen, Karen J.; Salinger, Margaret M.; Masten, Ellsworth 1999-2000. Dissociation as a function of child abuse and fantasy proneness in a substance abuse population, Imagination, Cognition and Personality, 192, 105-129. ^ Merckelbach, Harald and Jelicic, Marko 2004. Dissociative symptoms are related to endorsement of the vague trauma items, Comprehensive Psychiatry, 70-75. ^ Merckelbach, H., à Campo, J., Hardy, S., Giesbrecht, T. 2005. Dissociation and fantasy proneness in psychiatric patients: A preliminary study, Comprehensive Psychiatry, 463, 181-185. ^ AJ Giannini. Drugs of Abuse--Second ion. Los Angeles, Practice Management Information Corp.,1997. External links International Society for the Study of Trauma and Dissociation The official journal of the International Society for the Study of Dissociation ISSD, published between 1988 and 1997 Dissociation and Trauma Archives - Full text searchable articles and case studies published in the 1800s and early 1900s. Retrieved from http://en..org/wiki/Dissociation Categories: Abnormal psychology | Dissociative disorders | Defence mechanism Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page Languages Deutsch Español Italiano Nederlands 日本語 Polski Português Suomi This page was last modified on 13 September 2008, at 23:25
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