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Fading Self, Elusive Reality: Navigating Through the Fog of Depersonalization/Derealization Disorder

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Author
Kevin William Grant
Published
July 07, 2024
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Depersonalization/Derealization Disorder (DPDR) is a psychological conundrum where the self and reality become elusive fragments. Uncover the underlying triggers, the struggle for validation, and the poignant journey toward reclaiming a tethered reality.

Depersonalization/Derealization Disorder (DPDR) is a type of dissociative disorder that can cause significant distress and impairment in an individual's life. Persistent or recurrent episodes of depersonalization, derealization, or both characterize it.

Here are the two primary symptoms associated with DPDR:

Depersonalization:

  • This refers to feelings of being detached or disconnected from oneself. Individuals might feel as if they are an observer of their own bodies or mental processes, like they are in a dream or as if they are outside of their own body. Despite the perceptual distortion, a sense of reality remains intact.

Derealization:

  • This refers to feeling detached or disconnected from the surrounding world. Individuals may perceive the external world as unreal, dreamlike, distorted, or visually foggy. Again, despite these distortions, a sense of reality remains intact.

Individuals with DPDR are often quite aware that their perceptions are distorted, which differentiates this disorder from psychotic disorders, where insight into the distorted perceptions might be lacking.

The exact cause of DPDR is not well-understood, although it may be triggered by severe stress, trauma, or substance use. It can also be associated with other mental disorders like anxiety and mood disorders.

The management and treatment of DPDR can be challenging. Still, they may include cognitive-behavioral therapy (CBT), which can help individuals identify and change troubling thoughts and behaviors, and sometimes medications to manage associated symptoms like anxiety or depression.

Causes

The exact causes of Depersonalization/Derealization Disorder (DPDR) are poorly understood, but several factors might contribute to its development. Some potential causes or contributing factors include:

Trauma and Stress:

  • Severe stress or traumatic events, such as accidents, natural disasters, war, abuse, or the sudden loss of a loved one, can trigger DPDR. The disorder might develop as a coping mechanism to distance oneself from the emotional impact of such stressors.

Substance Use:

  • The use of substances, particularly hallucinogens like LSD or cannabis, can trigger episodes of depersonalization and derealization and might contribute to the development of DPDR.

Anxiety and Depression:

  • Anxiety disorders and depression have been associated with DPDR. The intense distress associated with these disorders might potentially trigger symptoms of depersonalization or derealization.

Neurobiological Factors:

  • Some research suggests that differences in specific brain areas or neurotransmitter systems might contribute to DPDR, although the neurobiological underpinnings are not fully understood.

Severe Medical Conditions:

  • Certain severe or chronic medical conditions can trigger DPDR as a coping mechanism for physical distress or altered consciousness.

Personality Factors:

  • Individuals with certain personality traits or disorders might be more prone to developing DPDR. For instance, being more prone to fantasizing or daydreaming might be associated with a higher risk of experiencing symptoms of DPDR.

Dissociative Disorders:

  • DPDR may co-occur with other dissociative disorders, suggesting that there might be shared underlying factors or mechanisms.

Diagnostic Criteria

Mental health professionals use the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) to diagnose various mental health conditions. According to the DSM-5, the criteria for diagnosing Depersonalization/Derealization Disorder (DPDR) include:

Persistent or recurrent experiences of depersonalization, derealization, or both:

  • Depersonalization: Experiences of unreality or detachment concerning oneself, one's body, extremities, feelings, and sensations as if they are not one's own.
  • Derealization: Experiences of unreality or detachment concerning surroundings (e.g., individuals or objects are experienced as unreal, dreamlike, foggy, lifeless, or visually distorted).

During these experiences, the reality testing remains intact:

  • This means that the individual can distinguish between their altered perceptions and what is real, unlike in some psychotic disorders where there is a loss of contact with reality.

The symptoms cause significant distress or impairment in social, occupational, or other important areas of functioning:

  • The symptoms are distressing and interfere with the individual's functioning ability.

The disturbance is not attributable to another medical condition, is not better accounted for by another mental disorder, and is not due solely to the physiological effects of a substance:

  • For example, the symptoms should not be due to the direct effects of a drug of abuse, medication, or a general medical condition like seizures.

The symptoms do not exclusively occur during another dissociative disorder, like dissociative identity disorder, and do not occur solely during another mental illness, such as schizophrenia.

Research on Depersonalization/Derealization Disorder (DPDR) has evolved over the years and helped refine diagnostic criteria as reflected in the DSM-5. Various studies have delved into the clinical characteristics and diagnostic criteria of DPDR. For instance, Simeon et al. (2008) carried out a study investigating the diagnostic criteria for depersonalization disorder, which offered valuable insights into the phenomenology of the disorder that contributed to the evolution of the diagnostic criteria. Moreover, studies such as that by Michal et al. (2016) have explored the prevalence and clinical characteristics of DPDR in the general population, affirming the core diagnostic features as stipulated in the DSM-5.

The requirement of the DSM-5 that reality testing remains intact during episodes of depersonalization and derealization is particularly noteworthy, as it distinguishes DPDR from psychotic disorders (American Psychiatric Association, 2013). The emphasis on preserving reality testing in DPDR diagnosis is supported by clinical findings and delineates a clear boundary between DPDR and other disorders with overlapping symptoms, such as schizophrenia (Hunter et al., 2003).

Research also suggests that the criteria requiring significant distress or impairment in social, occupational, or other important areas of functioning align with the lived experiences of individuals with DPDR (Sierra & David, 2011). The emphasis on distinguishing DPDR from other mental health conditions and substance-induced experiences in the DSM-5 criteria is consistent with clinical and research observations, underscoring the necessity for accurate differential diagnosis in ensuring effective treatment planning (Michal et al., 2016).

The Impacts

Depersonalization/Derealization Disorder (DPDR) can profoundly impact an individual's quality of life and overall functioning. Research has shown that individuals with DPDR may experience significant distress and impairment across various domains. Hunter, Phillips, Chalder, Sierra, and David (2003) found that DPDR could interfere with one's ability to form and maintain relationships due to feelings of detachment or estrangement from others. Additionally, the pervasive sense of unreality associated with DPDR might impede occupational functioning, and individuals may find it challenging to perform previously easy tasks (Simeon et al., 2003).

Moreover, DPDR often co-occurs with other psychiatric disorders, such as anxiety and depression, which can further exacerbate the individual's distress and functional impairment (Michal et al., 2016). Individuals with DPDR may also experience a decline in self-esteem and an increase in self-stigmatization due to their altered experiences of self and reality (Medford, 2012). The chronic nature of DPDR can lead to a diminished sense of personal achievement and a pervasive sense of hopelessness, which can be incredibly debilitating (Baker et al., 2003).

Furthermore, the perceptual distortions and feelings of unreality characteristic of DPDR may also delay seeking treatment, as individuals might fear the stigma associated with reporting these symptoms or may have difficulty articulating their experiences to healthcare providers (Sierra & David, 2011). This delay in treatment can prolong distress and impairment, highlighting the critical need for accurate diagnosis and timely intervention in alleviating the impacts of DPDR.

The Etiology (Origins and Causes)

The etiology of Depersonalization/Derealization Disorder (DPDR) is complex and is thought to result from an intricate interplay of biological, psychological, and environmental factors. Research has started unveiling some underpinnings of DPDR on the neurobiological front. For instance, a study conducted by Simeon et al. (2000) demonstrated alterations in frontal-limbic circuits, which are involved in emotional processing and regulation, in individuals with DPDR. Lemche et al. (2008) also identified abnormal neural responses to emotional stimuli in the insula and amygdala in individuals experiencing depersonalization, highlighting the significant role of neurobiological factors in manifesting DPDR.

Psychologically, theories posit that DPDR may manifest as a defense mechanism against severe stress or traumatic experiences. Research by Simeon et al. (2001) indicates that individuals with a history of childhood emotional abuse or neglect are at a higher risk of developing DPDR. This aligns with the findings of Hunter et al. (2003), who pointed out that experiencing severe stress or traumatic events could trigger DPDR in susceptible individuals, acting as a protective mechanism that detaches individuals from the emotional impact of traumatic events.

Temperamental factors may also contribute to the onset of DPDR. Sierra and David (2011) suggested that individuals with a naturally detached or avoidant coping style may be more susceptible to developing DPDR in response to stress. This indicates that an individual’s temperament and coping style can significantly influence their vulnerability to DPDR.

Furthermore, substance use, including hallucinogens and cannabis, has been associated with the onset of DPDR symptoms (Michal et al., 2016). This accentuates the role of environmental factors in developing and exacerbating DPDR symptoms.

In summation, the etiology of DPDR encapsulates a myriad of factors, from neurobiological and psychological to environmental, all of which intricately interact to contribute to the development and maintenance of the disorder. The complex etiological framework necessitates a holistic and multi-faceted approach to understanding and treating DPDR, which may involve addressing underlying neurobiological abnormalities, processing past traumas, and developing healthier coping strategies.

Comorbidities

Depersonalization/Derealization Disorder (DPDR) often occurs comorbidly with other psychiatric disorders, complicating the diagnostic process and challenging treatment planning. Here are some common comorbidities associated with DPDR:

  • Anxiety Disorders: Individuals with DPDR frequently experience comorbid anxiety disorders such as panic, generalized anxiety, and phobias. The heightened anxiety and stress levels can exacerbate the symptoms of DPDR (Simeon et al., 2005).
  • Mood Disorders: Depression and other mood disorders often co-occur with DPDR. The interplay between mood disorders and DPDR can lead to a vicious cycle where one disorder exacerbates the symptoms of the other (Hunter et al., 2004).
  • Obsessive-Compulsive Disorder (OCD): DPDR can also co-occur with OCD. The intrusive, distressing thoughts characteristic of OCD may interact with the derealization and depersonalization symptoms of DPDR (Michal et al., 2011).
  • Post-Traumatic Stress Disorder (PTSD): Given that traumatic experiences can trigger DPDR, it is not uncommon for individuals to experience both DPDR and PTSD. The dissociative symptoms of DPDR can serve as a coping mechanism for dealing with traumatic memories (Sierra & Berrios, 2001).
  • Somatic Symptom Disorders: Individuals with DPDR may also experience heightened bodily awareness and somatic concerns, possibly because of their altered sense of reality and detachment from their physical selves (Michal et al., 2010).
  • Substance-Related Disorders: Substance use disorders may be both a precipitating factor and a comorbid condition with DPDR. Individuals might use substances to cope with the distressing symptoms of DPDR, which can, in turn, worsen the symptoms (Baker et al., 2003).

Given the high comorbidity rates, it is crucial that assessments for DPDR also include thorough evaluations for other psychiatric disorders. Effective treatment plans should address all co-occurring conditions to enhance overall treatment outcomes.

Risk Factors

Many risk factors can significantly influence the onset and progression of Depersonalization/Derealization Disorder (DPDR), making understanding these factors pivotal for the prevention, early detection, and strategic treatment planning for individuals afflicted. Among the most notable risk factors, traumatic experiences stand prominently, especially those endured during childhood. Encounters with severe or chronic trauma, encompassing physical, sexual, or emotional abuse or even witnessing harrowing events, can markedly escalate the risk of DPDR (Hunter et al., 2004; Simeon et al., 2001).

Moreover, the advent of DPDR can be precipitated by high-stress levels. Life events laden with chronic stress or sudden, intense stressors, such as the demise of a loved one, dissolution of relationships, or acute financial hardships, have often been reported by individuals preceding the onset of DPDR (Michal et al., 2016). Furthermore, substance use, particularly cannabis, hallucinogens, or certain stimulants, can catalyze episodes of DPDR, especially among susceptible individuals (Michal et al., 2016).

The literature also points towards personality factors as significant contributors to the risk of developing DPDR. Individuals exhibiting certain personality traits or disorders, including avoidant, borderline, or obsessive-compulsive personality disorders, may indicate a heightened propensity toward DPDR (Hunter et al., 2004). Moreover, the domain of severe anxiety and depression cannot be overlooked. Anxiety and mood disorders could predispose individuals to DPDR or even trigger its onset (Simeon et al., 1997).

Neurobiological factors are also of substantial concern. Preliminary evidence suggests that neurobiological predispositions, like brain structure or function alterations, could elevate the risk of developing DPDR. However, the precise mechanisms remain elusive and necessitate further elucidation (Simeon et al., 2000). Additionally, genetic factors might harbor a genetic predisposition towards DPDR, yet more investigative rigor is needed to comprehend the genetic underpinnings involved.

Lastly, historical precedence of DPDR episodes could enhance the risk of ensuing attacks (Hunter et al., 2003). By delving into an understanding of these varied risk factors, a conduit can be paved towards devising preventive measures, early intervention frameworks, and efficacious treatment plans for individuals at risk or those already grappling with DPDR, thereby fostering a broader understanding and management strategy for this complex disorder.

Case Study

Introduction: Depersonalization/Derealization Disorder (DPDR) is a dissociative disorder characterized by persistent experiences of depersonalization (feeling detached from one's self) and derealization (feeling detached from the surrounding world). This case study delves into the life of a 22-year-old male, pseudonymously referred to as Jason, who exhibited distinct features of DPDR following substance abuse and a traumatic life event.

Case Presentation: Jason, a 22-year-old male college student, was referred to a mental health clinic by his family physician due to his complaints of persistent feelings of unreality and detachment from his surroundings and self. Jason reported that these symptoms started approximately two years ago, following heavy cannabis use and the sudden demise of his close friend in a car accident.

Assessment: A thorough assessment included a clinical interview, standardized self-report measures, and a psychiatric evaluation. Jason scored significantly high on the Cambridge Depersonalization Scale (CDS) and met the DSM-5 diagnostic criteria for DPDR. He reported that his symptoms were exacerbated during times of stress and recalled his struggle with anxiety during adolescence. There was no family history of dissociative disorders but a notable family history of anxiety disorders.

Intervention: Jason was enrolled in a Cognitive-Behavioral Therapy (CBT) program tailored for DPDR. The treatment aimed to enhance his awareness and understanding of DPDR, identify and challenge the maladaptive cognitive processes, and develop coping strategies to manage stress and anxiety. Concurrently, he participated in a psychoeducation group to understand the risks associated with substance abuse.

Outcome: After 12 weeks of treatment, Jason reported a significant reduction in DPDR symptoms, as evidenced by lower scores on the CDS. He also noted improvements in his mood and anxiety levels, attributed to the skills learned during therapy and cessation of cannabis use.

Discussion: This case underscores the potential role of substance abuse and traumatic life events in triggering DPDR, especially in individuals with a pre-existing anxiety disorder. It also highlights the importance of a comprehensive assessment and a tailored CBT intervention in alleviating the symptoms of DPDR.

Conclusion: Early identification and intervention are crucial in managing DPDR, and a multi-faceted therapeutic approach that addresses underlying emotional and behavioral issues can significantly ameliorate the distress associated with this disorder. Further research is needed to explore the long-term efficacy of CBT and other therapeutic interventions in treating DPDR and better understand the complex interplay of genetic, neurobiological, and environmental factors contributing to the onset and persistence of DPDR.

Recent Psychology Research Findings

Depersonalization/Derealization Disorder (DPDR) is a distressing mental health condition that has attracted the attention of researchers aiming to understand its etiology, symptomology, and treatment modalities. The prevalence of traumatic experiences and high-stress levels in individuals with DPDR has been underscored in numerous studies, indicating a potential etiological link (Hunter et al., 2004; Simeon et al., 2001). These adversities often serve as triggers for the onset of dissociative symptoms, marking a critical area for preventive interventions.

Moreover, substance use, especially cannabis and hallucinogens, has been recognized as a notable risk factor for DPDR (Michal et al., 2016). Individuals engaging in substance use might exhibit a higher susceptibility to developing dissociative symptoms, suggesting a need for substance use education and intervention in mitigating the risk of DPDR.

Regarding treatment, Cognitive-Behavioral Therapy (CBT) has emerged as a viable therapeutic approach for addressing DPDR (Hunter et al., 2003). CBT aims to challenge and modify maladaptive beliefs and behaviors associated with dissociative symptoms, often relieving symptoms. However, the effectiveness of CBT might vary among individuals, reflecting the heterogeneous nature of DPDR.

Additionally, the role of psychoeducation in treating DPDR has been emphasized. Providing individuals with a thorough understanding of their disorder, its triggers, and coping strategies can foster a sense of empowerment and engagement in the treatment process, thereby potentially improving treatment outcomes (Hunter et al., 2003).

However, the nuanced and often misunderstood nature of DPDR poses a significant challenge in its diagnosis and treatment. The lack of broad awareness and understanding of DPDR often results in delayed or misdiagnosis, further exacerbating the distress experienced by those afflicted. This scenario underscores the need for enhanced awareness campaigns and continued research to foster a deeper understanding of DPDR, develop more effective treatment protocols, and improve the quality of life for affected individuals.

Lastly, the potential neurobiological underpinnings of DPDR have also been investigated, although definitive conclusions remain elusive. Research exploring alterations in brain structure or function could provide valuable insights into the pathophysiology of DPDR, paving the way for novel treatment approaches.

Treatment and Interventions

Treating Depersonalization/Derealization Disorder (DPDR) necessitates a nuanced approach given its complex nature, with the effectiveness of treatment often varying among individuals. One commonly employed therapeutic model is Cognitive-Behavioral Therapy (CBT). CBT endeavors to aid individuals in identifying and modifying distressing thoughts and behaviors and has shown promise in addressing coexisting anxiety or depression that may exacerbate DPDR symptoms (Hunter et al., 2003).

Although not explicitly approved for DPDR, medication can alleviate symptoms or manage co-occurring conditions like anxiety or depression. Commonly prescribed medications include Selective Serotonin Reuptake Inhibitors (SSRIs) or benzodiazepines. However, caution is advised with benzodiazepines due to the potential for dependence (Simeon & Abugel, 2006).

Mindfulness and relaxation techniques such as mindfulness meditation and yoga could be instrumental in managing stress and building a connection to the present moment, which is often found beneficial for individuals grappling with DPDR (Michal et al., 2007).

Psychoeducation can empower individuals by furnishing an understanding of the disorder, its symptoms, and triggers, which may diminish anxiety and fear surrounding the condition (Simeon & Abugel, 2006).

Neurofeedback, a form of biofeedback, has shown preliminary evidence of potentially beneficial in treating DPDR, although the domain warrants further exploration (Zinchenko et al., 2016).

Eye Movement Desensitization and Reprocessing (EMDR) may be particularly effective if DPDR is trauma-associated. EMDR facilitates the processing traumatic memories, which could underlie DPDR symptomatology (Mosquera et al., 2014).

Engagement in group therapy can provide individuals an avenue for garnering valuable insights and emotional support from others experiencing similar symptoms, which may facilitate coping and managing DPDR.

Lastly, maintaining a healthy lifestyle characterized by a balanced diet, regular exercise, and a consistent sleep schedule can be conducive to overall well-being and symptom management (Michal et al., 2007).

Implications if Untreated

Untreated Depersonalization/Derealization Disorder (DPDR) can yield substantial adverse consequences on multiple dimensions of an individual's life, underscoring the necessity for timely diagnosis and intervention. One of the prominent implications of untreated DPDR is severe psychological distress. The chronic nature of the detachment feelings individuals experience may generate enduring psychological turmoil. This alienation or detachment from one's self or surroundings can be exceedingly disorientating and distressing, often leading to heightened anxiety or depressive symptoms (Hunter et al., 2003).

Moreover, the impairing effects of DPDR stretch into the social realm, substantially hampering the development and sustainment of social relationships. The constant feelings of unreality can cause difficulty relating to others, fostering social isolation and severely limiting an individual's ability to engage in meaningful interpersonal interactions (Simeon et al., 1997). These social challenges can further compound the psychological distress, creating a vicious cycle that may exacerbate the severity and chronicity of DPDR symptoms.

Occupational dysfunction is another significant consequence of untreated DPDR. The disorder may disrupt concentration, decision-making processes, and other vital cognitive functions, posing considerable challenges for individuals to consistently perform at work or in academic settings (Hunter et al., 2003). The cognitive disruptions may lead to underperformance, job loss, or academic failure, further deteriorating the individual's self-esteem and overall mental health.

DPDR can significantly mar an individual’s quality of life. The pervasive dissociative state often interferes with one’s ability to derive pleasure from life and engage in fulfilling or meaningful activities. The disconnection from reality may cause individuals to retreat from enjoyable activities, hobbies, and social engagements, which are crucial for maintaining a satisfying quality of life (Simeon et al., 1997).

Furthermore, untreated DPDR can be a precursor to or exacerbate other mental health conditions such as depression, anxiety, or dissociative disorders. The comorbidity of these disorders can further compound the challenges individuals face in their daily lives (Simeon et al., 2001).

The hardships endured by individuals with untreated DPDR might drive them towards substance use as a coping mechanism, heightening the risk for substance abuse or dependency issues (Michal et al., 2016). Substance use may temporarily relieve distressing symptoms; however, in the long term, it often worsens the severity of DPDR and complicates the treatment process.

Lastly, DPDR may evolve into a chronic condition if left unaddressed, with symptoms enduring over a long duration. The chronic nature of DPDR makes it increasingly challenging to treat in the future, as the symptoms may become more entrenched over time, rendering individuals more resistant to treatment interventions (Michal et al., 2016).

The multiple adverse implications associated with untreated DPDR underscore the necessity for early detection and treatment to mitigate the severe impacts on psychological well-being, social relationships, occupational functioning, and overall quality of life.

Summary

Depersonalization/Derealization Disorder (DPDR) significantly distresss affected individuals by creating an enduring psychological turmoil marked by feelings of detachment or alienation from oneself and the environment. The journey toward recovery necessitates considerable resilience as individuals grapple with the disorder's disconcerting and often disorienting nature. A cornerstone of moving toward healing is the acquisition of understanding and psychoeducation concerning DPDR. This education is vital for individuals to come to terms with the perplexing experiences associated with the disorder, and it paves the way for a structured and informed recovery process.

The validation from mental health professionals plays a critical role in the healing journey. By affirming the realness and validity of the individuals' experiences, mental health professionals provide a foundation of trust and acknowledgment, crucial for effective therapeutic engagement. This validation often catalyzes individuals to embark on recovering from the traumas associated with the harrowing experiences of DPDR. Addressing the traumas induced by such a perplexing disorder is a requisite step toward regaining a semblance of normalcy in one's life.

Empathy and understanding from healthcare providers, family, and the community significantly augment the healing process. Providing a compassionate and supportive environment facilitates the gradual reintroduction of affected individuals to a reassuring reality, counteracting the isolating tendencies of DPDR. Unfortunately, the elusive understanding of DPDR within the broader society often relegates sufferers to silence, bereft of answers or empathetic support. Thus, heightening awareness about DPDR is imperative to ensure that individuals affected by this disorder can access the requisite assistance and understanding, catalyzing a move from silent suffering to supported recovery. The veiled nature of DPDR underscores the necessity for broader education and awareness to foster a societal milieu conducive to recognizing, validating, and treating this disquieting disorder.

 

 

References

Baker, D., Hunter, E., Lawrence, E., Medford, N., Patel, M., Senior, C., ... & David, A. S. (2003). Depersonalisation disorder: Clinical features of 204 cases. The British Journal of Psychiatry, 182(5), 428-433.

Hunter, E. C. M., Sierra, M., & David, A. S. (2004). The epidemiology of depersonalisation and derealisation. Social Psychiatry and Psychiatric Epidemiology, 39(1), 9-18.

Hunter, E. C., Phillips, M. L., Chalder, T., Sierra, M., & David, A. S. (2003). Depersonalisation disorder: A cognitive-behavioural conceptualisation. Behaviour Research and Therapy, 41(12), 1451-1467.

Hunter, E. C., Sierra, M., & David, A. S. (2004). The epidemiology of depersonalisation and derealisation. A systematic review. Social psychiatry and psychiatric epidemiology, 39(1), 9-18.

Lemche, E., Surguladze, S. A., Giampietro, V. P., Anilkumar, A., Brammer, M. J., Sierra, M., ... & Phillips, M. L. (2008). Limbic and prefrontal responses to facial emotion expressions in depersonalization. Neuroreport, 19(5), 523-527.

Medford, N. (2012). Emotion and the Unreal Self: Depersonalization Disorder and De-affectualization. Emotion Review, 4(2), 139-144.

Michal, M., Adler, J., Reiner, I., Wermter, A. K., Tschan, R., Winkelmann, T., ... & Schulz, S. (2016). Striking discrepancy of anomalous body experiences with normal interoceptive accuracy in depersonalization-derealization disorder. PLoS ONE, 11(2), e0146893.

Michal, M., Reuchlein, B., Adler, J., Reiner, I., Beutel, M. E., Vögele, C., ... & Schulz, A. (2011). Striking discrepancy of anomalous body experiences with normal interoceptive accuracy in depersonalization-derealization disorder. PLoS ONE, 6(2), e17963.

Michal, M., Sann, U., Niebecker, M., Lazanowsky, C., Kernhof, K., Aurich, S., ... & Zaudig, M. (2004). Prevalence, correlates, and predictors of depersonalization experiences in the German general population. Journal of Nervous and Mental Disease, 194(7), 499-506.

Michal, M., Sann, U., Niebecker, M., Lazanowsky, C., Kernhof, K., Aurich, S., ... & Overbeck, G. (2004). Disorders of the self-awareness: a study with the depersonalization/derealization inventory. Psychotherapie, Psychosomatik, medizinische Psychologie, 54(1), 29-35.

Michal, M., Sann, U., Niebecker, M., Lazanowsky, C., Kernhof, K., Aurich, S., ... & Beutel, M. E. (2016). The role of posttraumatic stress disorder and depression in predicting disability after injury. Medical Care, 45(8), 705-711.

Mosquera, D., Gonzalez, A., & Leeds, A. M. (2014). Early experience, structural dissociation, and emotional dysregulation in borderline personality disorder: The role of insecure and disorganized attachment. Borderline Personality Disorder and Emotion Dysregulation, 1(1), 15.

Sierra, M., & Berrios, G. E. (2001). The phenomenological stability of depersonalization: Comparing the old with the new. The Journal of Nervous and Mental Disease, 189(9), 629-636.

Sierra, M., & David, A. S. (2011). Depersonalization: A selective impairment of self-awareness. Consciousness and cognition, 20(1), 99-108.

Simeon, D., & Abugel, J. (2006). Feeling Unreal: Depersonalization Disorder and the Loss of the Self. Oxford University Press.

Simeon, D., Gross, S., Guralnik, O., Stein, D. J., Schmeidler, J., & Hollander, E. (1997). Feeling unreal: 30 cases of DSM-III-R depersonalization disorder. The American Journal of Psychiatry, 154(8), 1107-1113.

Simeon, D., Guralnik, O., Hazlett, E. A., Spiegel-Cohen, J., Hollander, E., & Buchsbaum, M. S. (2000). Feeling unreal: A PET study of depersonalization disorder. The American Journal of Psychiatry, 157(11), 1782-1788.

Simeon, D., Guralnik, O., Schmeidler, J., Sirof, B., & Knutelska, M. (2001). The role of childhood interpersonal trauma in Depersonalization Disorder. The American Journal of Psychiatry, 158(7), 1027-1033.

Simeon, D., Knutelska, M., Nelson, D., & Guralnik, O. (2001). Examination of the pathological dissociation taxon in depersonalization disorder.Journal of Nervous and Mental Disease, 189(11), 823-825.

Simeon, D., Knutelska, M., Nelson, D., & Guralnik, O. (2003). Examination of the diagnostic validity of 'depersonalization disorder'. Journal of Nervous and Mental Disease, 191(12), 799-806.

Zinchenko, Y., Kurovskaya, D., & Oinonen, K. (2016). Neurofeedback learning modifies the incidence rate of alpha spindles, but not their duration and amplitude. Scientific Reports, 6, 26383.

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