Depersonalization and derealization as sequelae of a temporal lobe lesion: a case report.

BACKGROUND: Depersonalization and derealization can occur not just from psychiatric causes but also from various organic etiologies, such as seizures and intracerebral structural abnormalities. However, there have been no previous reported cases to the authors' knowledge detailing isolated depersonalization and derealization in the absence of clinical seizure activity or other psychiatric pathology, as sequelae of structural intracerebral lesions. CASE PRESENTATION: In this case report, we detail the unique presentation of a 68-year-old woman under the care of palliative medicine who experienced depersonalization and derealization secondary to a metastatic lesion in her temporal lobe, in the parahippocampal gyrus to medial occipitotemporal gyrus region. These symptoms were present in the absence of any clinical seizure activity or other psychiatric symptomatology and largely resolved with the use of steroidal therapy, before returning secondary to disease progression. CONCLUSIONS: We discuss the relationship among isolated depersonalization and derealization with pathology of the left posterior temporal lobe in the context of this interesting case. This case expands our knowledge of the neurobiology of these phenomena, given the specific localization of the intracerebral pathology and temporal specificity of symptoms relative to tumor growth and treatment course.

How vestibular dysfunction transforms into symptoms of depersonalization and derealization?

BACKGROUND: Psychiatric Depersonalization/Derealization (DPDR) symptoms were demonstrated in patients with peripheral vestibular disorders. However, only semicircular canals (SCCs) dysfunction was evaluated, therefore, otoliths' contribution to DPDR is unknown. Also, DPDR symptoms in patients with central vestibular dysfunction are presently unknown. DPDR was also studied in the context of spatial disorientation and anxiety, but the relation of these cognitive and emotional functions to vestibular dysfunction requires clarification. METHODS: We tested patients with peripheral Bilateral Vestibular Hypofunction (pBVH), Machado Joseph Disease (MJD) with cerebellar and central bilateral vestibular hypofunction, and healthy controls. Participants completed the video Head Impulse Test (vHIT) for SCCs function, cervical Vestibular Evoked Myogenic Potentials test (cVEMPt) for sacculi function, Body Sensation Questionnaire (BSQ) for panic anxiety, Object Perspective-Taking test (OPTt) for spatial orientation and Cox & Swinson DPDR inventory for DPDR symptoms. RESULTS: pBVH patients showed significant SCCs and sacculi dysfunction, spatial disorientation, elevated panic anxiety, and DPDR symptoms. MJD patients showed significant SCCs hypofunction but preserved sacculi function, spatial disorientation but normal levels of panic anxiety and DPDR symptoms. Only pBVH patients demonstrated a positive correlation between the severity of the DPDR and spatial disorientation and panic anxiety. CONCLUSIONS: DPDR develops in association with sacculi dysfunction, either with or without SSCs dysfunction. Spatial disorientation and anxiety seem to mediate the transformation of vestibular dysfunction into DPDR symptoms. DPDR does not develop in MJD with central vestibular hypofunction but a normal saccular response. We propose a three-step model that describes the development of DPDR symptoms in vestibular patients.

Anxiety sensitivity, distress intolerance, and negative interpretation bias strengthen the relationship between trait anxiety and depersonalization.

BACKGROUND OBJECTIVES: Depersonalization is common in anxiety disorders, but little is known about factors that influence co-occurring anxiety and depersonalization. DESIGN: We investigated trait moderators of the relationships between state and trait anxiety and depersonalization to better understand their co-occurrence and to identify potential points of intervention. METHODS: Adults recruited on Amazon Mechanical Turk (N = 303) completed two computer tasks designed to increase variability in state anxiety and depersonalization as well as several self-report questionnaires. RESULTS: As hypothesized, anxiety positively predicted depersonalization at both a state level and trait level. Moreover, as hypothesized, the trait anxiety-trait depersonalization relationship was strengthened by greater anxiety sensitivity; distress intolerance; and negative interpretation bias for anxiety sensations, and for depersonalization sensations. None of these hypothesized trait moderators significantly strengthened the state anxiety-state depersonalization relationship. CONCLUSIONS: These findings suggest that, on a trait level, anxiety and depersonalization more frequently co-occur when people catastrophically misinterpret their symptoms or have lower emotional distress tolerance.

Evaluation of a brief cognitive behavioral group intervention to reduce depersonalization in students with high levels of trait test anxiety: a randomized controlled trial.

Background and objectives: Students with high levels of test anxiety frequently experience depersonalization during examinations. We investigated whether a brief cognitive behavioral group intervention reduces these symptoms.Design: Randomized controlled trial.Methods: Students with high levels of trait test anxiety and impairing depersonalization symptoms during their last oral examination were randomized. While the intervention group (n = 22) received a group training, a control group (n = 16) underwent an active waiting time protocol. Effects of the intervention on depersonalization severity and its appraisal, attention focus, emotion regulation, anxiety, heart rate, and heart rate variability within the Trier Social Stress Test for groups were examined. A follow-up assessment was conducted after a university oral examination. Registration number: DRKS00010190.Results: Depersonalization and its appraisal significantly changed within the intervention group, but not within the control group. The intervention group reported significantly less self-focused attention and fear and used the coping strategy reappraisal significantly more often. No significant Group × Time interaction was detected regarding heart rate and heart rate variability. Follow-up results give a first indication of the reduction of depersonalization through the intervention in a naturalistic setting.Conclusion: The intervention seems promising for treating depersonalization in students with high levels of trait test anxiety.

A Network Approach to Studying the Associations Between Posttraumatic Stress Disorder Symptoms and Dissociative Experiences.

In recent years, there has been a growing recognition of a dissociative subtype of posttraumatic stress disorder (D-PTSD), characterized by experiences of depersonalization (DP) and derealization (DR), among individuals with PTSD. Little is known, however, about how experiences of DP and/or DR are associated with the experience of other PTSD symptoms. The central aim of the present paper was to explore the associations among DP, DR, and other PTSD symptoms by means of a network analysis of cross-sectional data for 557 participants whose overall self-reported PTSD symptom severity warranted a probable PTSD diagnosis. Three notable findings emerged: (a) a strong association between DP and DR, (b) the identification of DP as the most central symptom in the network, and (c) the discovery that clusters of symptoms in the network were roughly consistent with DSM-5 PTSD criteria. We discuss these findings in light of some considerations, including the nature of our sample and the limits of interpreting cross-sectional network models.

Depersonalization- and derealization-like phenomena of epileptic origin.

OBJECTIVE: Depersonalization refers to the sensation of being detached from one's body, often associated with feelings of loss of control over one's own body, actions, or thoughts. Derealization refers to the altered perception of one's surroundings that is experienced as unreal. Although usually reported by psychiatric patients suffering from depression or anxiety, single case reports and small case series have described depersonalization- and derealization-like symptoms in the context of epilepsy. METHODS: We investigated the brain mechanisms of ictal depersonalization- and derealization like symptoms by analyzing clinical and neuropsychological data as well as the epileptogenic zone based on a multimodal approach in a group of patients reporting depersonalization- (n = 9) and derealization-like symptoms (n = 7), from a single presurgical epilepsy center with focal epilepsy. We compared them with a group of control patients with experiential phenomena due to temporal lobe epilepsy (n = 28). RESULTS: We show that all patients with ictal depersonalization-like symptoms report altered self-identification with their body and mostly suffer from frontal lobe epilepsy with the epileptogenic zone in the dorsal premotor cortex, while patients with derealization-like symptoms suffer from temporal lobe epilepsy. This finding is supported by post-ictal neuropsychological deficits, showing that depersonalization-like symptoms were significantly more often associated with frontal lobe dysfunction as compared to the control patients and patients with derealization-like symptoms. CONCLUSION: We argue that depersonalization of epileptic origin constitutes a distinct disorder due to frontal lobe epilepsy. We discuss these findings with respect to earlier accounts of depersonalization and the recent concept of bodily self-consciousness.

Features of dissociation differentially predict antidepressant response to ketamine in treatment-resistant depression.

BACKGROUND: Ketamine induces rapid and robust antidepressant effects, and many patients also describe dissociation, which is associated with antidepressant response. This follow-up study investigated whether antidepressant efficacy is uniquely related to dissociative symptom clusters. METHODS: Treatment-resistant patients with major depressive disorder (MDD) or bipolar disorder (BD) (n = 126) drawn from three studies received a single subanesthetic (0.5 mg/kg) ketamine infusion. Dissociative effects were measured using the Clinician-Administered Dissociative States Scale (CADSS). Antidepressant response was measured using the 17-item Hamilton Depression Rating Scale (HAM-D). A confirmatory factor analysis established the validity of CADSS subscales (derealization, depersonalization, amnesia), and a general linear model with repeated measures was fitted to test whether subscale scores were associated with antidepressant response. RESULTS: Factor validity was supported, with a root mean square error of approximation of .06, a comparative fit index of .97, and a Tucker-Lewis index of .96. Across all studies and timepoints, the depersonalization subscale was positively related to HAM-D percent change. A significant effect of derealization on HAM-D percent change was observed at one timepoint (Day 7) in one study. The amnesia subscale was unrelated to HAM-D percent change. LIMITATIONS: Possible inadequate blinding; combined MDD/BD datasets might have underrepresented ketamine's antidepressant efficacy; the possibility of Type I errors in secondary analyses. CONCLUSIONS: From a psychometric perspective, researchers may elect to administer only the CADSS depersonalization subscale, given that it was most closely related to antidepressant response. From a neurobiological perspective, mechanistic similarities may exist between ketamine-induced depersonalization and antidepressant response, although off-target effects cannot be excluded.

Burnout syndrome in nurses working in palliative care units: An analysis of associated factors.

AIMS: To analyse the association between psychological, labour and demographic factors and burnout in palliative care nursing. BACKGROUND: There is a lack of published research evaluating burnout in palliative care nursing. METHODS: This observational cross-sectional study involved 185 palliative care nurses in Mexico. The primary variables were burnout defined by its three dimensions (emotional exhaustion, depersonalization and personal accomplishment). As secondary variables, psychological, labour and demographic factors were considered. A binary logistic regression model was constructed to determine factors associated with burnout. RESULTS: A total of 69 nurses experienced high emotional exhaustion (37.3%), 65 had high depersonalization (35.1%) and 70 had low personal performance (37.8%). A higher proportion of burnout was found in the participants who were single parents, working >8 hr per day, with a medium/high workload, a lack of a high professional quality of life and a self-care deficit. CONCLUSION: Our multivariate models were very accurate in explaining burnout in palliative care nurses. These models must be externally validated to predict burnout and prevent future complications of the syndrome accurately. IMPLICATIONS FOR NURSING MANAGEMENT: Nurses who present the factors found should be the focus of interventions to reduce work stress.

Basic Self-Disturbances beyond Schizophrenia: Discrepancies and Affinities in Panic Disorder - An Empirical Clinical Study.

BACKGROUND: Anomalous self-experiences (ASEs), presumably involving alterations in "core" or "minimal self," have been studied as manifest in schizophrenia and its spectrum, in contrast with mood disorder and personality disorder samples. This is the first study to examine ASEs in panic disorder (PD), beginning the exploration of these disturbances of subjectivity in anxiety disorders. We aimed to clarify what might, or might not, be specific to the schizophrenia spectrum domain - which, in turn, could be useful for developing pathogenetic models for various disorders. SAMPLING AND METHODS: 47 hospital outpatients with PD and no other medical and psychiatric comorbidity and 47 healthy control (HC) subjects were assessed with the Examination of Anomalous Self Experiences (EASE) and Cambridge Depersonalization Scale (CDS). RESULTS: All our PD patients had overall ASE and EASE scores significantly higher than our HCs (mean ± SD 17.94 ± 11.88 vs. HC 1.00 ± 1.81), approaching levels found in previous schizophrenia spectrum samples. The distribution of particular EASE items and subitems in the PD sample was heterogeneous, varying from rare (<10%) or absent (termed "discrepancies" with schizophrenia spectrum: 29 items) to being present in >50% of subjects ("affinities" with schizophrenia spectrum: 7 items). EASE and CDS scores were highly correlated (r = 0.756, 95% CI 0.665-0.840). CONCLUSIONS: PD patients scored higher on items suggesting common forms of derealization and depersonalization, perhaps suggesting "secondary" and defensive psychological processes, while lacking indicators of more profound ipseity disturbance. Our study supports the basic-self-disturbance model of schizophrenia, while suggesting the possibility of transnosological "schizophrenia-like phenomena," which might require careful phenomenological exploration to be distinguished from those of true psychotic or schizophrenic conditions.

Factores de riesgo y niveles de burnout en enfermeras de atención primaria: una revisión sistemática / Risk factors and burnout levels in Primary Care nurses: a systematic review

OBJETIVO: Conocer los factores de riesgo y los niveles de burnout en enfermeras de :atención primaria. METODOLOGÍA: Se realizó una revisión sistemática. Fuentes de datos. Se consultaron CINAHL, CUIDEN, LILACS, Pubmed, ProQuest, ScienceDirect y Scopus. Las ecuaciones de búsqueda fueron: «burnout AND community health nursing» y «burnout AND primary care nursing». La búsqueda se realizó en octubre del 2015. Selección de estudios. La muestra final fue de n=12. Se incluyeron estudios primarios cuantitativos que utilizasen el Maslach Burnout Inventory para evaluar el burnout en enfermeras de atención primaria, sin restricción por fecha de publicación. Extracción de datos. Las principales variables fueron la media y desviación típica de las 3 dimensiones del burnout, las prevalencias de niveles bajos, medios y altos de cada dimensión, y los factores sociodemográficos, laborales y psicológicos que potencialmente influyen en su desarrollo. RESULTADOS: Los estudios muestran prevalencias de cansancio emocional alto, por lo general, entre el 23 y el 31%. Las prevalencias de despersonalización alta y realización personal baja muestran heterogeneidad, variando entre el 8-32 y el 4-92% de la muestra respectivamente. Los estudios informan de que las enfermeras con mayor edad, mayor antigüedad laboral, ansiedad y depresión, entre otras variables, presentan mayores niveles de burnout, mientras que aquellas con mayor sueldo, satisfacción laboral alta, apoyo de la organización y buen autoconcepto lo padecen menos. CONCLUSIÓN: El cansancio emocional alto es la principal dimensión del burnout afectada en la enfermería de atención primaria. En despersonalización y realización personal existe heterogeneidad. Debe prevenirse el burnout en estos profesionales potenciando los factores protectores y vigilando su aparición en los que presenten factores de riesgo

OBJECTIVE: To determine the risk factors and levels of burnout in Primary Care nurses. METHODS: A systematic review was performed. Data sources. CINAHL, CUIDEN, LILACS, PubMed, ProQuest, ScienceDirect and Scopus databases were consulted. Search equations were 'burnout AND community health nursing' and 'burnout AND primary care nursing'. The search was performed in October 2015. Study selection. The final sample was n=12 studies. Quantitative primary studies that used Maslach Burnout Inventory for burnout assessment in Primary Care nurses were included without restriction by publication date. Data extraction. The main variables were the mean and standard deviation of the three burnout dimensions, high, medium and low prevalence rates of each dimension, and socio-demographic, occupational and psychological variables that potentially influence burnout level. RESULTS: Studies show high prevalence rates, generally between 23% and 31%, of emotional exhaustion. The prevalence rates of high depersonalisation and low personal accomplishment show heterogeneity, varying between 8%-32% and 4%-92% of the sample, respectively. Studies show that older nurses with more seniority, anxiety and depression, among other variables, have higher burnout levels, while nurses with higher salary, high job satisfaction, organisational support, and good self-concept have less burnout. CONCLUSION: High emotional exhaustion is the main affected dimension of burnout in Primary Care nursing. There is heterogeneity in depersonalisation and personal accomplishment. Burnout must be prevented in these professionals, by increasing protective factors and monitoring its appearance in those with risk factors

Working hours and common mental disorders in English police officers.

BACKGROUND: There is a paucity of evidence on working hours and their psychological correlates in police officers of the federated ranks in England. AIMS: An exploratory study to establish the extent to which a sample of English police officers worked long hours and the association between long working hours and common mental disorder (CMD). METHODS: Officers of the federated ranks (constable, sergeant, inspector) from two English county forces completed a questionnaire to report their typical weekly working hours and symptoms of CMD. We also collected socio- and occupational-demographic data. We defined long working hours as ≥49 h in a typical week in accordance with 48-h weekly limit specified in the 1993 European Directive on the Organisation of Working Time. We established associations between long working hours and self-reported CMDs using binary logistic regression to generate odds ratios (ORs) and 95% confidence intervals (CIs) adjusted for potential confounding variables. RESULTS: Twenty-seven per cent (n = 327/1226) of respondents reported long working hours. The ORs for psychological distress (OR 2.05, 95% CI 1.57-2.68), emotional exhaustion (OR 1.99, 95% CI 1.52-2.59), and depersonalization (OR 1.30, 95% CI 1.00-1.71) were significantly increased for long working hours after adjustment for socio- and occupational-demographic characteristics. CONCLUSIONS: More than one quarter of sampled police officers reported working long hours and were significantly more likely to report CMD. National and longitudinal research is required to confirm these findings, which suggest management of working hours may effectively promote psychological well-being.

Reduction of depersonalization during social stress through cognitive therapy for social anxiety disorder: A randomized controlled trial.

Symptoms of depersonalization during feared social situations are commonly experienced by individuals with social anxiety disorder (SAD). Despite its clinical relevance, it is not addressed in standard treatment manuals and it remains unclear if depersonalization is reduced by well-established treatments. This study investigated whether cognitive therapy (CT) for SAD effectively reduces depersonalization and whether pre-treatment severity of depersonalization predicts or mediates treatment outcome. In a randomized controlled trial, patients underwent the standardized Trier Social Stress Test before and after CT (n=20) or a waitlist period (n=20) and were compared to healthy controls (n=21). Self-reported depersonalization was measured immediately after each stress test. Depersonalization significantly decreased following CT, especially in treatment responders (ηp2=0.32). Pre-treatment depersonalization did neither predict nor mediate post-treatment severity of social anxiety. Further prospective studies are needed for a better scientific understanding of this effect. It should be scrutinized whether SAD-patients suffering from depersonalization would benefit from a more specific therapy.

Despersonalización y esquizofrenia: estudio comparativo entre primeros y múltiples episodios de esquizofrenia / Depersonalisation and schizophrenia: Comparative study of initial and multiple episodes of schizophrenia

Introducción. Los fenómenos de despersonalización/desrealización se han asociado clásicamente con las fases iniciales de la psicosis y se supone que precederían (incluso en años) a la psicosis clínica, siendo mucho más frecuentes en la fase prodrómica y en la fase aguda de la enfermedad. Los objetivos del presente estudio son analizar las diferencias para los fenómenos de despersonalización/desrealización existentes entre los pacientes con primeros o con múltiples episodios de esquizofrenia y los factores que podrían influir en ello. Material y métodos. Estudio descriptivo, controlado y transversal en el que se estudiaron 48 sujetos diagnosticados de esquizofrenia paranoide (20 con un primer episodio y 28 con episodios múltiples). Fueron evaluados mediante la Escala de Despersonalización de Cambridge, la Escala de los Síndromes Positivo y Negativo y la Escala de Experiencias Disociativas, entre otras. Resultados. Los sujetos con primeros episodios de esquizofrenia presentan mayores puntuaciones tanto en la Escala de Despersonalización de Cambridge como en la subescala que valora estas experiencias en la Escala de Experiencias Disociativas. No encontramos asociaciones entre estas y la subescala de síntomas positivos de la Escala de los Síndromes Positivo y Negativo. Conclusiones. Las experiencias de despersonalización/desrealización aparecen con mayor frecuencia, duración e intensidad en pacientes con primeros episodios de esquizofrenia que en pacientes con múltiples episodios de la enfermedad (AU)

Introduction. The phenomena of depersonalisation/derealisation have classically been associated with the initial phases of psychosis, and it is assumed that they would precede (even by years) the onset of clinical psychosis, being much more common in the prodromal and acute phases of the illness. The aims of the present study are to analyse the differences in depersonalisation/derealisation between patients with initial and multiple episodes and the factors that could influence this. Material and methods. A descriptive, controlled and cross-sectional study of 48 patients diagnosed with paranoid schizophrenia (20 with an initial episode and 28 with multiple episodes). These patients were assessed using scales such as the Cambridge Depersonalization Scale, the Positive and Negative Symptom Scale, and the Dissociative Experiences Scale. Results. Participants with initial episodes score higher on both the Cambridge Depersonalisation Scale, and the subscale of the Dissociative Experiences Scale that evaluates such experiences. There were no associations between these types of experience and the positive symptoms subscale of the Positive and Negative Symptom Scale. Conclusions. Depersonalisation/derealisation experiences appear with greater frequency, duration and intensity in patients in the early stages of the illnesses, gradually decreasing as they become chronic (AU)

Propuesta de un modelo de respuesta de los delirios esquizofrénicos a los antipsicóticos / Proposal of a model of schizophrenic delusions’ response to antipsychotics

Pese al gran avance experimentado por la psicofarmacología, hay preguntas obvias en la práctica cotidiana que no suelen centrar la atención de los investigadores. Se propone un modelo que explique la respuesta variable que se observa en los delirios esquizofrénicos al tratamiento antipsicótico. Se trata de un modelo compuesto por dos polos. En uno de ellos rige el paradigma de la inhibición de la respuesta de evitación condicionada, que remite al efecto ataráxico o neuroléptico de estos fármacos. El otro polo se basa en una aplicación de la fenomenología de Husserl a la psicopatología, que permite la organización de diferentes fenómenos característicos de la esquizofrenia. Las ganancias en este ámbito se ponen en relación con la hipersaliencia dopaminérgica característica del brote esquizofrénico. Por último, se reconocen las limitaciones del modelo propuesto, que no dejan de ser las mismas que las de la psiquiatría, obligada a moverse entre la neurociencia y la persona, ámbitos de conocimiento mutuamente irreductibles (AU)

Despite recent advances in psychopharmacology, some obvious questions regarding the day-to-day practice do not use to draw attention of researchers. Our model tries to explain the variable response of schizophrenic delusions to antipsychotic drugs. It is a model composed of two poles. In one of them the principle of conditioned avoidance response applies, which refers to the ataraxic or neuroleptic effect of antipsychotic drugs. At the other end of the model Husserl’s phenomenology is applied to psychopathology in order to organize diverse and distinctive phenomena of schizophrenia. Results of this research are then related to the dopaminergic aberrant salience occurring in the schizophrenic outbreak. Finally, constraints of this work are pointed out, which are the same for the very foundations of psychiatry, a medical specialty compelled to move between fields of knowledge mutually irreducible such as neuroscience and human experience (AU)

Depression-Burnout Overlap in Physicians.

BACKGROUND: Whether burnout is a distinct phenomenon rather than a type of depression and whether it is a syndrome, limited to three "core" components (emotional exhaustion, depersonalization and low personal accomplishment) are subjects of current debate. We investigated the depression-burnout overlap, and the pertinence of these three components in a large, representative sample of physicians. METHODS: In a cross-sectional study, all Austrian physicians were invited to answer a questionnaire that included the Major Depression Inventory (MDI), the Hamburg Burnout Inventory (HBI), as well as demographic and job-related parameters. Of the 40093 physicians who received an invitation, a total of 6351 (15.8%) participated. The data of 5897 participants were suitable for analysis. RESULTS: Of the participants, 10.3% were affected by major depression. Our study results suggest that potentially 50.7% of the participants were affected by symptoms of burnout. Compared to physicians unaffected by burnout, the odds ratio of suffering from major depression was 2.99 (95% CI 2.21-4.06) for physicians with mild, 10.14 (95% CI 7.58-13.59) for physicians with moderate, 46.84 (95% CI 35.25-62.24) for physicians with severe burnout and 92.78 (95% CI 62.96-136.74) for the 3% of participants with the highest HBI_sum (sum score of all ten HBI components). The HBI components Emotional Exhaustion, Personal Accomplishment and Detachment (representing depersonalization) tend to correlate more highly with the main symptoms of major depression (sadness, lack of interest and lack of energy) than with each other. A combination of the HBI components Emotional Exhaustion, Helplessness, Inner Void and Tedium (adj.R2 = 0.92) explained more HBI_sum variance than the three "core" components (adj.R2 = 0.85) of burnout combined. Cronbach's alpha for Emotional Exhaustion, Helplessness, Inner Void and Tedium combined was 0.90 compared to α = 0.54 for the combination of the three "core" components. CONCLUSIONS: This study demonstrates the overlap of burnout and major depression in terms of symptoms and the deficiency of the three-dimensional concept of burnout. In our opinion, it might be preferable to use multidimensional burnout inventories in combination with valid depression scales than to rely exclusively on MBI when clinically assessing burnout.

Is that me in the mirror? Depersonalisation modulates tactile mirroring mechanisms.

Our sense of self is thought to develop through sensory-motor contingencies provided, not only by observing one's own body, but also by mirroring interactions with others. This suggests that there is a strong link between mirroring mechanisms and the bodily self. The present study tested whether this link is expressed at early, implicit stages of the mirroring process or at later, more cognitive stages. We also provide, to the best of our knowledge, the first demonstration of how inter-individual differences in our sense of bodily self may affect mirroring mechanisms. We used somatosensory event-related potentials (SEPs) to investigate the temporal dynamics of mirroring highly self-related information (viewed touch on one's own face) compared to other-related information (viewed touch on a stranger's face), in individuals with low and high levels of depersonalisation, a mental condition characterised by feeling detached or estranged from one's self and body. For the low-depersonalisation group, mirroring for self-related events (P45) preceded mirroring for other-related events (N80). At later stages (P200), mirroring was stronger for other-related than self-related events. This shows that early, implicit and later, more cognitive processes play different relative roles in mirroring self- and other-related bodily events. Critically, mirroring differed in the high-depersonalisation group, specifically for self-related events. An absence of early, implicit mirroring for self-related events over P45 suggests that the associated processes may be the neural correlates of the disembodiment experienced in depersonalisation. A lack of differential mirroring for self- and other-related events over P200 may reflect compensatory mechanisms that redress deficiencies in mirroring at earlier stages, which may break down to give rise to symptoms of depersonalisation. Alternatively, or in addition, they may represent an attenuation of processes related to self-other distinction. Our study thus shows that mirroring, especially for events on one's own face, can be strongly affected by how connected the observer feels to their own bodily self.

A disembodied man: A case of somatopsychic depersonalization in schizotypal disorder.

In the general concept of self-disturbances in schizophrenia and schizophrenia spectrum disorders, somatopsychic depersonalization (SPD) occupies a special place as it constitutes a syndrome that comprises feelings of detachment from one's own body and mental processes. However, apart from clinical descriptions, to date the pathophysiology of SPD is not fully understood due to the rareness of the syndrome and a lack of experimental studies. In a case study of one patient with schizotypal disorder, we applied a multimodal approach to understanding the SPD phenomena. The patient's clinical profile was identified as disruption of implicit bodily function, accompanied by depressive symptoms. On a neuropsychological level, the patient exhibited impairment in executive functioning, intact tactile perception and kinesthetic praxis. Behavioral tests revealed an altered sense of time but unimpaired self-agency. Furthermore, the patient exhibited a lack of empathy and he had autistic traits, although with a sufficient ability to verbalize his feelings. On the neurobiological level using an active and passive touch paradigm during functional magnetic resonance imaging (fMRI), we found a hyperconnectivity of the default-mode network and salience network and a hypoconnectivity of the central executive brain networks in the performance of the touch task as well as intact perceptual touch processing emerging from the direct comparisons of the touch conditions. Our data provide evidence for the important role of altered large-brain network functioning in SPD that corresponds to the specific behavioral and neurocognitive phenomena.

Aripiprazole in depersonalization disorder comorbid with major depression and obsessive-compulsive disorder: 3 cases.

Depersonalization is a frequent symptom in depression and obsessive-compulsive disorder (OCD), but sometimes, it may be severe and concurrently diagnosed as a disorder. The treatment of depersonalization disorder both alone and comorbid with other psychiatric disorders is as yet unclear. This report presents the successful treatment with aripiprazole of concurrent depersonalization disorder in 3 patients with depression or OCD. The psychiatric disorders were diagnosed through structured clinical interviews. Assessments were by means of Yale-Brown Obsessive-Compulsive Scale, the Clinical Global Impression-Improvement Scale, and the 17-item Hamilton Rating Scale for Depression. Aripiprazole may be a beneficial psychotropic drug in the treatment of depersonalization disorder comorbid with OCD or depression, which is an important problem in clinical practice.