Dissociative identity disorder

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Dissociative identity disorder
ICD-10 F44.8
ICD-9 300.14
MeSH D009105

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Alonso Alvarado, M.D. [2], Sonya Gelfand

Synonyms: Multiple personality disorder

Overview

Dissociative Identity Disorder (DID), as defined by the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders (DSM-V-TR), is a mental condition whereby a single individual evidences two or more distinct identities or personalities, each with its own pattern of perceiving and interacting with the environment. The diagnosis requires that at least two personalities routinely take control of the individual's behavior and that there is associated memory loss that goes beyond normal forgetfulness, often referred to as losing time or acute Dissociative Amnesia[1]. The symptoms of DID do not necessarily need to be the direct result of substance abuse or a more general medical condition in order to be diagnosed. DID was originally called Multiple Personality Disorder (MPD), and as referenced above, that name remains in the International Statistical Classification of Diseases and Related Health Problems. It is also commonly mispronounced "Disassociative Identity Disorder", and the primary symptom erroneously called "disassociation".

This condition is not the same as schizophrenia (DSM-IV Schizophrenia and Other Psychotic Disorders), as is a common misconception. The term schizophrenia comes from root words for "split mind," however it refers to a fracture in the normal functioning of the brain rather than the personality.

Dissociation is a symptom of several psychiatric disorders, including Borderline Personality Disorder (DSM-IV Personality Disorders 301.83), Post-traumatic stress disorder (DSM-IV Anxiety Disorders 309.81[2]), and Complex Post Traumatic Stress Disorder among others.

As a diagnosis, DID remains controversial. For many years DID was regarded as a North American phenomenon[3][4][5] with the bulk of the literature still arising there. However, research demonstrates a lack of consensus belief in the validity of DID amongst North American psychiatrists.[6][7] Practitioners who do accept DID as a valid disorder have produced an extensive literature with some of the more recent papers originating outside North America.[5][8]

Historical perspective

  • A prominent curiosity of spiritualism, parapsychology and hypnosis continued throughout the 19th and early 20th centuries, relating to Locke's views that there was an association of ideas requiring the coexistence of feelings with awareness of the feelings.[9][4]
  • Hypnosis, introduced by Mesmer and de Puységur in the late 1700s, opposed Locke's association of ideas. Hypnotists observed second personalities emerging during hypnosis and wondered how two minds could coexist. Hence early cases of what would now be diagnosed as DID appeared and were treated by hypnosis.[9][4][10]
  • The 19th century saw a number of increasingly sophisticated reported cases of multiple personalities which Rieber estimated would be close to one hundred.[9]
  • Epilepsy was seen as a factor in some cases. This connection is still upon discussion today.[9][11][12]
  • By the late 19th century there was a realization that emotionally traumatic experiences may cause long-term disorders which may manifest with a variety of symptoms. Charcot then introduced his ideas of the impact of nervous shocks as a cause for a variety of neurological conditions. As one of Charcot's students, Janet took these ideas and went on to develop his own theories of dissociation.[13] [14]
  • In the early 20th century interest in dissociation and MPD waned for a number of reasons. After Charcot's death in 1893 many of his "hysterical" patients were exposed as frauds and Janet's association with Charcot tarnished his theories of dissociation.[4]
  • In 1910, Bleuler introduced the term "schizophrenia" to replace "dementia praecox" and a review of the Index Medicus from 1903 through 1978 showed a dramatic decline in the number of reports of multiple personality after the diagnosis of schizophrenia "caught on."[15]
  • The public however was exposed to psychological ideas which took their interest. Mary Shelley's Frankenstein, Robert Louis Stevenson's Strange Case of Dr Jekyll and Mr Hyde and many short tales by Edgar Allan Poe, had a disturbing impact but it was not until the 1957 publication of the book The Three Faces of Eve, and the popular movie which followed it, that the American public's interest in multiple personality was revived.[9]
  • In 1974 the highly influential book Sybil was published and six years later the diagnosis of Multiple Personality Disorder was included in the DSM.
  • As media coverage spiked, diagnoses climbed. There were 200 reported cases of MPD from 1880 to 1979, and 20,000 from 1980 to 1990. Acocella reports that 40,000 cases were diagnosed from 1985 to 1995.[16][17]
  • The majority of diagnoses are made in North America, particularly the United States, and in English-speaking countries more generally with reports recently emerging from other countries.[18][19][20][21][22][23][24][25]

Defining the terms

Main article: Dissociation (psychology)
  • Dissociation at its simplest means that "two or more mental processes or contents are not associated or integrated." This definition assumes that these elements should normally be associated or integrated in conscious awareness, memory, or identity. [26]
  • The DSM-IV characterizes dissociation as "disruption in the usually integrated functions of consciousness, memory, identity, or perception of the environment" while the ICD-10 defines it as "partial or complete loss of the normal integration between memories of the past, awareness of identity and immediate sensations, and control of bodily movements."[27]
  • To dissociate is to separate the association of one thing with another.[4]
  • Multiple personalities occur when the identity of a person dissociates to the extent that they have separate existences with their own "identities, life histories, and enduring patterns of perceiving, thinking about and relating to the environment which is distinct from the habitual personality's mode of being in the world."[28]
  • Alter derives from alter ego and means one of the individual personalities in a person with multiple personalities.[29]

Defining the controversy

  • One of the primary reasons for the ongoing re-categorization of this condition is that there were once so few documented cases (research in 1944 showed only 76) of what was once referred to as multiple personality.[30]
  • Dissociation is recognized as a symptomatic presentation in response to trauma, extreme emotional stress, and, as noted, in association with emotional dysregulation and borderline personality disorder.[31]
  • Often regarded as a dynamic sub-symptomatology, it has become more frequent as an ancillary diagnosis, rather than a primary diagnosis.

The DSM re-dress

  • There is considerable controversy over the validity of the multiple personality controversy profile as a diagnosis. Unlike the more empirically verifiable mood and personality disorders, dissociation is primarily subjective for both the patient and the treatment provider. The relationship between dissociation and multiple personality creates conflict regarding the MPD diagnosis.
  • While other disorders require a certain amount of subjective interpretation, those disorders more readily present generally accepted, objective symptoms. The controversial nature of the dissociation hypothesis is shown quite clearly by the manner in which the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders (DSM) has addressed, and re-dressed, the categorization over the years.
  • The second edition of the DSM referred to this diagnostic profile as Multiple Personality Disorder. The third edition grouped Multiple Personality Disorder in with the other four major Dissociative Disorders. The current edition, the DSM-IV-TR, categorizes the disorder as Dissociative Identity Disorder. The ICD-10 (International Statistical Classification of Diseases and Related Health Problems) continues to refer to the condition as Multiple Personality Disorder.

The MPD/DID epidemic in North America

  • Parisin a review offered four possible causes for the sudden increase in people diagnosed with MPD/DID:[32]
  1. The result of therapist suggestions to easily swayed people, much as Charcot's hysterics acted in accordance with his expectations.
  2. Psychiatrists' past failure to recognise dissociation being redressed by new training and knowledge.
  3. Dissociative phenomena are actually increasing, but this increase only represents a new form of an old and protean entity: "hysteria."
  4. Powerful psychosocial forces are changing the psychological balance of individuals so as to make dissociative experiences more common.
  • Paris suggests that the first possible cause is the most likely.

Other positions

  • The debate over the validity of this condition, whether as a clinical diagnosis, a symptomatic presentation, a subjective misrepresentation on the part of the patient, or a case of unconscious collusion on the part of the patient and the professional is considerable (see multiple personality controversy).
  • There is very little in the way of objective, quantifiable evidence for describing the disorder. This makes the disorder itself subjective, as well as its diagnosis.
  • The main points of disagreement are as follows:
  1. Whether MPD/DID is a real disorder or simply a fad.
  2. If it is real, is the appearance of multiple personalities real or delusional?
  3. If it is real, should it be defined in psychoanalytic terms?
  4. Can it and should it be cured?
  5. Who should primarily define the experience—therapists, or those who believe that they have multiple personalities?
  • Skeptics claim that people who present with the appearance of alleged multiple personality may have learned to exhibit the symptoms in return for social reinforcement.

Classification

  • There is no established system for the classification of dissociative identity disorder.

Pathophysiology

  • Reviews of the literature have discussed the findings of various psychophysiologic investigations of DID. Many of the investigations include testing and observation in one person but with different alters. Different alter states show distinct physiological markers. EEG studies have shown distinct differences between alters, findings another study failed to replicate.[11][33][34][35][36][37]
  • Another study concluded that the differences involved intensity of concentration, mood changes, degree of muscle tension, and duration of recording, rather than some inherent difference between the brains of persons with multiple personalities and those of normal persons. One EEG study comparing DID with hysteria showed differences between the two diagnoses.[38][39]
  • A proposed link between epilepsy and DID has been disputed by a number of authors.[40][12]
  • Some brain imaging studies have shown differing cerebral blood flow with different alters while another has failed to replicate this finding.[41][42] [43]
  • A different imaging study showed that findings of smaller hippocampal volumes in patients with a history of exposure to traumatic stress and an accompanying stress-related psychiatric disorder were also demonstrated in DID. This study also found smaller amygdala volumes.[44]
  • Studies have demonstrated various changes in visual parameters between alters.[45][46][47]
  • One twin study showed hereditable factors were present in DID.[48]

Causes/etiology

  • Although many experts dispute the existence of this controversial diagnosis, DID has been attributed by some to the interaction of several factors:
    • Overwhelming stress
    • Dissociative capacity (including the ability to uncouple one's memories, perceptions, or identity from conscious awareness)
    • The enlistment of steps in normal developmental processes as defenses
    • The lack of sufficient nurturing and compassion in response to hurtful experiences or lack of protection against further overwhelming experiences during childhood.[49]
      • Children are not born with a sense of a unified identity — it develops from many sources and experiences. In overwhelmed children, its development is obstructed, and many parts of what should have blended into a relatively unified identity remain separate.
      • North American studies show that 97 to 98% of adults with dissociative identity disorder report abuse during childhood and that abuse can be documented for 85% of adults and for 95% of children and adolescents with dissociative identity disorder and other closely related forms of Dissociative Disorders. Although these data establish childhood abuse as a major cause among North American patients (in some cultures, the consequences of war and disaster play a larger role), they do not mean that all such patients were abused or that all the abuses reported by patients with dissociative identity disorder really happened. Some aspects of some reported abuse experiences may prove to be inaccurate. Patients may have also experienced important early losses (such as death of a parent), serious medical illness, or other very stressful events. Parents helping people through these times can act as a preventative measure.[50]
      • Human development requires that children be able to integrate complicated and varying types of information and experiences successfully. As children achieve cohesive, complex appreciations of themselves and others, they go through phases in which different perceptions and emotions are kept segregated. Each developmental phase may be used to generate different selves.
      • Not every child who experiences abuse or major loss or trauma has the capacity to develop multiple personalities. Patients with dissociative identity disorder can be easily hypnotized. This capacity, closely related to the capacity to dissociate, is thought to be a factor in the development of the disorder. However, most children who have these capacities also have normal adaptive mechanisms, and most are sufficiently protected and soothed by adults to prevent development of dissociative identity disorder.[50]

Differential diagnosis

  • Dissociative identity disorder must be differentiated from:[51]

Epidemiology and demographics

Prevalence

  • The prevalence of dissociative identity disorder is 1,500 per 100,000 (1.5%) among the U.S. adult population.[51]

Gender

  • The prevalence of dissociative identity disorder among males is 1,600 per 100,000 (1.6%) of the overall population and among females is 1,400 per 100,000 (1.4%) of the overall population.[51]

Region

  • Reports of the prevalence of the disorder in other locations of the world are often given by advocates for the condition and figures from psychiatric populations (inpatients and outpatients) show a wide diversity from different countries:
  • Figures from the general population show less diversity:
    • China (0%)[21]
    • Turkey (0.4% for a general sample and 1.1% for a female sample)[25][55]
    • Canada (1%)[56]

Risk Factors

  • Terrorism
  • Childhood prostitution
  • War
  • Medical or surgical procedures.

Natural history, prognosis and complications

Natural History

  • Dissociative identity disorder can appear at any age.
  • The disorder is usually associated with memory, attachment or concentration problems in children as the disease doesn't present identity changes during childhood. It can be confused with adolescent turmoil during adolescence.
  • When diagnosed in older patients, these usually have symptoms associated with mood changes such as paranoia, obsessive-compulsive disorder, mood disorders associated with a psychotic disease.[51]
  • DID does not disappear suddenly, although the severity of symptoms may change. A patient's progress can be divided in three groups.

Prognosis

  • Poor prognosis is associated with:[51]
    • Permanent abuse
    • Association with other psychiatric disorders
    • New traumatizing experience
    • Severe medical illness and delay in appropriate medical treatment for the disorder

Diagnosis

Diagnostic criteria

DSM-V Diagnostic Criteria for Dissociative Identity Disorder[51]

  • A. Identity disruption which main characteristic is the presence of more then one personality states, sometimes defined as an possession experience in some cultures. The alteration is associated with behavior changes, affect, consciousness, memory and cognition changes or loss in the agency or self sense. These changes can be self-reported or observed by another person.

OR

  • B. Presence of recurrent lack of memory of everyday events, traumatic events and/or personal information which can be associated with common forgetfulness.

AND

  • C. A clinically significant impairment in the patients normal life is caused by the disorder's symptoms.

AND

  • D. The disorder is not associated to a normal cultural or religious practice which is accepted by the community. In children, the presence of imaginary playmates does not explain the symptoms.

AND

  • E. The consumption of substances or other diseases does not explain the symptoms.

Symptoms

  • Other symptoms may include:
    • Depersonalization, which refers to feeling unreal, removed from one's self, and detached from one's physical and mental processes. The patient feels like an observer of their life and may actually see themselves as if they were watching a movie.
    • Derealization refers to experiencing familiar persons and surroundings as if they were unfamiliar and strange or unreal.
    • Again, doctors must be careful not to assume that a client has MPD or DID simply because they exhibit some or all of these symptoms. In order for DID to be diagnosed, there must be two or more distinctly present personalities.
  • Persons with dissociative identity disorder are often told of things they have done but do not remember and of notable changes in their behavior. They may discover objects, productions, or handwriting that they cannot account for or recognize; they may refer to themselves in the first person plural (we) or in the third person (he, she, they); and they may have amnesia for events that occurred between their mid-childhood and early adolescence. Amnesia for earlier events is normal and widespread.

Diagnostic Problems Associated with Culture

  • Symptoms such as seizures, paralysis or sensory loss may be common among certain cultures. Possession is common in some settings such as rural areas or a few religions in the United States and Europe, therefore the symptoms and different identities could be associated with different demons that have possessed the patient.[51]

Diagnostic Problems Associated with Gender

  • The diagnosis is harder to make among adult males as these patients tend to hide their symptoms and deny traumatic experiences. On the other had, the disease is more common in boys than girls. The presentation in females is usually more related with acute dissociative states such as flashbacks, conversion disorders, hallucinations, self mutilation and amnesia. Males have usually more violent or criminal behaviors which are triggered by stressful states such as prison, sexual or physical assaults and war.[51]

Laboratory Findings

  • There are no diagnostic laboratory findings associated with dissociative identity disorder.

Imaging

  • Imaging studies are usually not indicated in diagnosis of dissociative identity disorder.

Treatment/management

  • The most common approach to treatment aims to relieve symptoms, to ensure the safety of the individual, and to reconnect the different identities into one well-functioning identity. There are, however, other equally respected treatment modalities that do not depend upon integrating the separate identities.
  • Treatment also aims to help the person safely express and process painful memories, develop new coping and life skills, restore functioning, and improve relationships. The best treatment approach depends on the individual and the severity of his or her symptoms. Treatment is likely to include some combination of the following methods:
    • Psychotherapy: This kind of therapy for mental and emotional disorders uses psychological techniques designed to encourage communication of conflicts and insight into problems.[58][59]
    • Cognitive therapy: This type of therapy focuses on changing dysfunctional thinking patterns.
    • Medication: There is no medication to treat Dissociative Disorders themselves. However, a person with a Dissociative Disorder who also suffers from depression or anxiety might benefit from treatment with a medication such as an antidepressant or anti-anxiety medicine.
    • Family therapy: This kind of therapy helps to educate the family about the disorder and its causes, as well as to help family members recognize symptoms of a recurrence.
    • Expressive therapy such as art therapy or music therapy: These therapies allow the patient to explore and express his or her thoughts and feelings in a safe and creative way.
    • Clinical hypnosis: This is a treatment technique that uses intense relaxation, concentration and focused attention to achieve an altered state of consciousness or awareness[57]
    • Behavior therapy: As an increasing number of therapists view DID as iatrogenic, or caused by reinforcing treatment teams, new approaches have emerged. Current standards of care may involve requiring the patient respond to a single name, and refusing to speak with the patient if she or he is a different sex, age, or person than initially presented. As the patient begins to respond more consistently to a single name, and speak in the first person, more traditional therapy for trauma may begin. Though some dislike this approach or criticize it as disrespectful of the client, it is highly effective, and many published accounts confirm this approach. See Kohlenberg & Tsai's "Functional Analytic Psychotherapy" (1991) for a more detailed explanation of this approach.
    • Ego-state therapy: Ego-state therapy is used to help non-dissociative individuals resolve conflicts among different parts of themselves (i.e. ego states); since DID is an extreme differentiation among ego states, many therapists find the approach useful in working with dissociative clients.[60]

Prevention/screening

  • Strategies to prevent the development of DID depend upon how the etiology of the disorder is perceived. Early childhood trauma is frequently attributed as an etiology of DID, and so from this viewpoint, prevention of childhood trauma should reduce the incidence of DID. Those who believe that DID is often caused by suggestions from the clinician to suggestible people, caution clinicians against contributing to the diagnosis.[61][8]

Future and Investigational Therapies

  • Neuroimaging is a novel method of discovering the relationship between DID and brain structure, which many hope will uncover the effect of DID on the brain, and possible medication for DID.[62]

See also

References

  1. ↑ Understanding dissociative disorders ( Mind.org.uk )
  2. ↑ Posttraumatic Stress Disorder ( DSM-IV 309.81, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition )
  3. ↑ Boon S, Draijer N (1991). "Diagnosing dissociative disorders in The Netherlands: a pilot study with the Structured Clinical Interview for DSM-III-R Dissociative Disorders". The American journal of psychiatry. 148 (4): 458–62. PMID 2006691.
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Atchison M, McFarlane AC (1994). "A review of dissociation and dissociative disorders". The Australian and New Zealand journal of psychiatry. 28 (4): 591–9. PMID 7794202.
  5. ↑ 5.0 5.1 Piper A, Merskey H (2004). "The persistence of folly: a critical examination of dissociative identity disorder. Part I. The excesses of an improbable concept". Canadian journal of psychiatry. Revue canadienne de psychiatrie. 49 (9): 592–600. PMID 15503730. Full Text
  6. ↑ Pope HG, Oliva PS, Hudson JI, Bodkin JA, Gruber AJ (1999). "Attitudes toward DSM-IV dissociative disorders diagnoses among board-certified American psychiatrists". The American journal of psychiatry. 156 (2): 321–3. PMID 9989574.
  7. ↑ Lalonde JK, Hudson JI, Gigante RA, Pope HG (2001). "Canadian and American psychiatrists' attitudes toward dissociative disorders diagnoses". Canadian journal of psychiatry. Revue canadienne de psychiatrie. 46 (5): 407–12. PMID 11441778.
  8. ↑ 8.0 8.1 Piper A, Merskey H (2004). "The persistence of folly: critical examination of dissociative identity disorder. Part II. The defence and decline of multiple personality or dissociative identity disorder". Canadian journal of psychiatry. Revue canadienne de psychiatrie. 49 (10): 678–83. PMID 15560314. Full Text
  9. ↑ 9.0 9.1 9.2 9.3 9.4 Rieber RW (2002). "The duality of the brain and the multiplicity of minds: can you have it both ways?". History of psychiatry. 13 (49 Pt 1): 3–17. doi:10.1177/0957154X0201304901. PMID 12094818.
  10. ↑ Carlson ET (1989). "Multiple personality and hypnosis: the first one hundred years". Journal of the history of the behavioral sciences. 25 (4): 315–22. PMID 2677129.
  11. ↑ 11.0 11.1 Cocores JA, Bender AL, McBride E (1984). "Multiple personality, seizure disorder, and the electroencephalogram". J. Nerv. Ment. Dis. 172 (7): 436–8. PMID 6427406.
  12. ↑ 12.0 12.1 Devinsky O, Putnam F, Grafman J, Bromfield E, Theodore WH (1989). "Dissociative states and epilepsy". Neurology. 39 (6): 835–40. PMID 2725878.
  13. ↑ Borch-Jacobsen M, Brick D (2000). "How to predict the past: from trauma to repression". History of Psychiatry. 11: 15–35. doi:10.1177/0957154X0001104102.
  14. ↑ van der Kolk BA, van der Hart O (1989). "Pierre Janet and the breakdown of adaptation in psychological trauma". The American journal of psychiatry. 146 (12): 1530–40. PMID 2686473.
  15. ↑ Rosenbaum M (1980). "The role of the term schizophrenia in the decline of diagnoses of multiple personality". Arch. Gen. Psychiatry. 37 (12): 1383–5. PMID 7004385.
  16. ↑ Acocella, Joan (1999). Creating Hysteria: Women and Multiple Personality Disorder. San Francisco: Jossey-Bass Publishers, 1999. ISBN 0-7879-4794-6
  17. ↑ Adams, Cecil (2003). "Does multiple personality disorder really exist?." The Straight Dope.
  18. ↑ Spanos, Nicholas P. (2001). Multiple Identities & False Memories: A Sociocognitive Perspective. American Psychological Association (APA). ISBN 1-55798-893-5 Amazon.com
  19. ↑ 19.0 19.1 Adityanjee, Raju GS, Khandelwal SK (1989). "Current status of multiple personality disorder in India". The American journal of psychiatry. 146 (12): 1607–10. PMID 2589555.
  20. ↑ 20.0 20.1 Modestin J (1992). "Multiple personality disorder in Switzerland". The American journal of psychiatry. 149 (1): 88–92. PMID 1728191.
  21. ↑ 21.0 21.1 21.2 Xiao Z, Yan H, Wang Z; et al. (2006). "Trauma and dissociation in China". The American journal of psychiatry. 163 (8): 1388–91. doi:10.1176/appi.ajp.163.8.1388. PMID 16877651.
  22. ↑ 22.0 22.1 Gast U, Rodewald F, Nickel V, Emrich HM (2001). "Prevalence of dissociative disorders among psychiatric inpatients in a German university clinic". J. Nerv. Ment. Dis. 189 (4): 249–57. PMID 11339321.
  23. ↑ 23.0 23.1 Friedl MC, Draijer N (2000). "Dissociative disorders in Dutch psychiatric inpatients". The American journal of psychiatry. 157 (6): 1012–3. PMID 10831486.
  24. ↑ 24.0 24.1 Sar V, Koyuncu A, Ozturk E; et al. (2007). "Dissociative disorders in the psychiatric emergency ward". General hospital psychiatry. 29 (1): 45–50. doi:10.1016/j.genhosppsych.2006.10.009. PMID 17189745.
  25. ↑ 25.0 25.1 Akyüz G, Doğan O, Sar V, Yargiç LI, Tutkun H (1999). "Frequency of dissociative identity disorder in the general population in Turkey". Comprehensive psychiatry. 40 (2): 151–9. PMID 10080263.
  26. ↑ Cardeña E. "The domain of dissociation" In Clinical And Theoretical Perspectives, edited by Lynn S. Rhue J. New York: Guilford, 1994. ISBN 0-89862-186-0.
  27. ↑ Spitzer C, Barnow S, Freyberger HJ, Grabe HJ (2006). "Recent developments in the theory of dissociation". World psychiatry : official journal of the World Psychiatric Association (WPA). 5 (2): 82–6. PMID 16946940.
  28. ↑ van der Hart O, Friedman B (1989). "A reader's guide to Pierre Janet on dissociation: a neglected intellectual heritage". Dissociation. 2 (1): 3–16, . Text
  29. ↑ Bliss EL (1980). "Multiple personalities. A report of 14 cases with implications for Schizophrenia and hysteria". Arch. Gen. Psychiatry. 37 (12): 1388–97. PMID 7447619.
  30. ↑ Creating Hysteria by Joan Acocella, 1999.
  31. ↑ Marmer S, Fink D (1994). "Rethinking the comparison of Borderline Personality Disorder and multiple personality disorder". Psychiatr Clin North Am. 17 (4): 743–71. PMID 7877901.
  32. ↑ Paris J (1996). "Review-Essay : Dissociative Symptoms, Dissociative Disorders, and Cultural Psychiatry". Transcult Psychiatry. 33 (1): 55–68. doi:10.1177/136346159603300104.
  33. ↑ Putnam FW (1984). "The psychophysiologic investigation of multiple personality disorder. A review". Psychiatr. Clin. North Am. 7 (1): 31–9. PMID 6371727.
  34. ↑ Miller SD, Triggiano PJ (1992). "The psychophysiological investigation of multiple personality disorder: review and update". The American journal of clinical hypnosis. 35 (1): 47–61. PMID 1442640.
  35. ↑ Putnam FW, Zahn TP, Post RM (1990). "Differential autonomic nervous system activity in multiple personality disorder". Psychiatry research. 31 (3): 251–60. PMID 2333357.
  36. ↑ Hughes JR, Kuhlman DT, Fichtner CG, Gruenfeld MJ (1990). "Brain mapping in a case of multiple personality". Clinical EEG (electroencephalography). 21 (4): 200–9. PMID 2225470.
  37. ↑ Lapointe AR, Crayton JW, DeVito R, Fichtner CG, Konopka LM (2006). "Similar or disparate brain patterns? The intra-personal EEG variability of three women with multiple personality disorder". Clinical EEG and neuroscience : official journal of the EEG and Clinical Neuroscience Society (ENCS). 37 (3): 235–42. PMID 16929711.
  38. ↑ Coons PM, Milstein V, Marley C (1982). "EEG studies of two multiple personalities and a control". Arch. Gen. Psychiatry. 39 (7): 823–5. PMID 7165480.
  39. ↑ Flor-Henry P, Tomer R, Kumpula I, Koles ZJ, Yeudall LT (1990). "Neurophysiological and neuropsychological study of two cases of multiple personality syndrome and comparison with chronic hysteria". International journal of psychophysiology : official journal of the International Organization of Psychophysiology. 10 (2): 151–61. PMID 2272862.
  40. ↑ Ross CA, Heber S, Anderson G; et al. (1989). "Differentiating multiple personality disorder and complex partial seizures". General hospital psychiatry. 11 (1): 54–8. PMID 2912820.
  41. ↑ Reinders AA, Nijenhuis ER, Paans AM, Korf J, Willemsen AT, den Boer JA (2003). "One brain, two selves". Neuroimage. 20 (4): 2119–25. PMID 14683715.
  42. ↑ Reinders AA, Nijenhuis ER, Quak J; et al. (2006). "Psychobiological characteristics of dissociative identity disorder: a symptom provocation study". Biol. Psychiatry. 60 (7): 730–40. doi:10.1016/j.biopsych.2005.12.019. PMID 17008145.
  43. ↑ Mathew RJ, Jack RA, West WS (1985). "Regional cerebral blood flow in a patient with multiple personality". The American journal of psychiatry. 142 (4): 504–5. PMID 3976929.
  44. ↑ Vermetten E, Schmahl C, Lindner S, Loewenstein RJ, Bremner JD (2006). "Hippocampal and amygdalar volumes in dissociative identity disorder". The American journal of psychiatry. 163 (4): 630–6. doi:10.1176/appi.ajp.163.4.630. PMID 16585437.
  45. ↑ Miller SD (1989). "Optical differences in cases of multiple personality disorder". J. Nerv. Ment. Dis. 177 (8): 480–6. PMID 2760599.
  46. ↑ Miller SD, Blackburn T, Scholes G, White GL, Mamalis N (1991). "Optical differences in multiple personality disorder. A second look". J. Nerv. Ment. Dis. 179 (3): 132–5. PMID 1997659.
  47. ↑ Birnbaum MH, Thomann K (1996). "Visual function in multiple personality disorder". Journal of the American Optometric Association. 67 (6): 327–34. PMID 8888853.
  48. ↑ Jang KL, Paris J, Zweig-Frank H, Livesley WJ (1998). "Twin study of dissociative experience". J. Nerv. Ment. Dis. 186 (6): 345–51. PMID 9653418.
  49. ↑ First Person Plural
  50. ↑ 50.0 50.1 50.2 50.3 Merck.com The Merck Manual.
  51. ↑ 51.0 51.1 51.2 51.3 51.4 51.5 51.6 51.7 51.8 Diagnostic and statistical manual of mental disorders : DSM-5. Washington, D.C: American Psychiatric Association. 2013. ISBN 0890425558.
  52. ↑ Foote B, Smolin Y, Kaplan M, Legatt ME, Lipschitz D (2006). "Prevalence of dissociative disorders in psychiatric outpatients". The American journal of psychiatry. 163 (4): 623–9. doi:10.1176/appi.ajp.163.4.623. PMID 16585436.
  53. ↑ Ross CA, Anderson G, Fleisher WP, Norton GR (1992). "Dissociative experiences among psychiatric inpatients". General hospital psychiatry. 14 (5): 350–4. PMID 1521791.
  54. ↑ Bliss EL, Jeppsen EA (1985). "Prevalence of multiple personality among inpatients and outpatients". The American journal of psychiatry. 142 (2): 250–1. PMID 3970252.
  55. ↑ Sar V, Akyüz G, Doğan O (2007). "Prevalence of dissociative disorders among women in the general population". Psychiatry research. 149 (1–3): 169–76. doi:10.1016/j.psychres.2006.01.005. PMID 17157389.
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  57. ↑ 57.0 57.1 Webmd.com
  58. ↑ The Psychoanalytic Psychotherapy of Dissociative Identity Disorder in the Context of Trauma Therapy ( Psychoanalytic Inquiry, 2000)
  59. ↑ International Psychoanalytical Association ( IPA )
  60. ↑ Watkins, H. H. (1993)Ego-State Therapy: An Overview. American Journal of Clinical Hypnosis, 35 (4), pp. 232 - 240 ( Psychoanalytic Inquiry, 2000)
  61. ↑ Erkwoh R, Sass H (1993). "[Multiple personality disorder: old concepts presented as new]". Der Nervenarzt (in German). 64 (3): 169–74. PMID 8479587.
  62. ↑ Spiegel D, Loewenstein RJ, Lewis-Fernández R, Sar V, Simeon D, Vermetten E; et al. (2011). "Dissociative disorders in DSM-5". Depress Anxiety. 28 (9): 824–52. doi:10.1002/da.20874. PMID 21910187.

de:Dissoziative Identitätsstörung he:פיצול אישיות id:Kepribadian yang terpecah nl:Dissociatieve identiteitsstoornis fi:Dissosiatiivinen identiteettihäiriö sv:Dissociativ identitetsstörning ur:تفارقی شناختی اضطراب Template:WH Template:WS

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