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ABSTRACT: OBJECTIVES: Stress has a strong influence on pain sensitivity. However, the direction of this influence is unclear. Recent studies reported both decreased and increased pain sensitivities under stress, and one hypothesis is that interindividual differences account for these differences. The aim of our study was to investigate the effect of stress on individual pain sensitivity in a relatively large female sample. METHODS: Eighty female participants were included. Pain thresholds and temporal summation of pain were tested before and after stress, which was induced by the Mannheim Multicomponent Stress Test. In an independent sample of 20 women, correlation coefficients between 0.45 and 0.89 indicated relatively high test-retest reliability for pain measurements. RESULTS: On average, there were significant differences between pain thresholds under non-stress and stress conditions, indicating an increased sensitivity to pain under stress. No significant differences between non-stress and stress conditions were found for temporal summation of pain. On an individual basis, both decreased and increased pain sensitivities under stress conditions based on Jacobson's criteria for reliable change were observed. Furthermore, we found significant negative associations between pain sensitivity under non-stress conditions and individual change of pain sensitivity under stress. Participants with relatively high pain sensitivity under non-stress conditions became less sensitive under stress and vice versa. DISCUSSION: These findings support the view that pain sensitivity under stress shows large interindividual variability, and point to a possible dichotomy of altered pain sensitivity under stress.
Pain Medicine 04/2013; · 2.35 Impact Factor
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ABSTRACT: Impulsivity is regarded as a key feature in borderline personality disorder (BPD). However, discrepancies in previous research indicate that the role of impulsivity in BPD is not yet fully understood. For example, state-dependent impulsivity in individuals with BPD may be related to co-occurring psychiatric conditions such as attention-deficit/hyperactivity disorder (ADHD) and to emotional states. We assessed self-reports of trait and state impulsivity and response inhibition before and after an experimental stress induction in 15 patients with BPD without ADHD, 15 patients with BPD and ADHD, 15 patients with ADHD, and 15 healthy participants. The patients in both BPD subgroups reported a stress-dependent increase of state impulsivity, which was not observed in the other groups. Response inhibition was impaired in the patients with BPD and ADHD but not in those without ADHD compared with the healthy participants. We suggest that stress levels and co-occurring ADHD should receive attention in future studies on impulsivity in BPD.
The Journal of nervous and mental disease 02/2013; 201(2):116-23. · 1.77 Impact Factor
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ABSTRACT: Conditioning studies in Borderline Personality Disorder (BPD) revealed intact acquisition and within-session extinction for patients with low acute dissociation and impaired acquisition for patients with high acute dissociation. In Posttraumatic Stress Disorder (PTSD) delayed short-term extinction as well as reduced discrimination learning was found. Controlling for acute dissociation, with a subgroup analysis of BPD patients with and without comorbid PTSD we aimed to further understand the influence of both disorders on altered conditioning processes. Aversive differential conditioning was assessed in 33 non-medicated female patients meeting DSM-IV criteria for BPD (15 with and 18 without co-occurring PTSD). An aversive sound served as unconditioned stimulus (US), and two neutral pictures as conditioned stimuli (CS+, CS−). Conditioning was assessed by skin conductance responses (SCRs) and ratings of valence and arousal. BPD patients without PTSD revealed a significant differentiation between CS+ and CS− during acquisition, early and late extinction in SCR. BPD patients with PTSD did not show differential responses during any of these phases. BPD patients without PTSD showed differential responses during acquisition, early and late extinction. This underpins intact learning regarding acquisition processes, but points to impaired within-session extinction. BPD patients with PTSD had difficulties in the acquisition of the differentiation between the danger and the safety signal, possibly indicating a discrimination problem. (PsycINFO Database Record (c) 2012 APA, all rights reserved)
Zeitschrift für Psychologie 10/2012; 218(2):80-88. · 0.81 Impact Factor
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ABSTRACT: Emotion dysregulation in Borderline Personality Disorder (BPD) is characterized by high baseline negative intensity, high reactivity, and slow return to baseline. Patients with BPD often engage in self-injurious behavior because it leads to immediate relief of stress levels. We aimed to assess stress regulation as well as the influence of tissue damage on subjective (aversive tension) and objective (heart rate) stress correlates in BPD. In 14 unmedicated patients with BPD and 18 healthy controls, a stress induction was followed by an incision into the forearm conducted by an investigator. For aversive tension, we found elevated baseline levels as well as slower return to baseline in BPD. In controls, incision resulted in a short-term increase of aversive tension, whereas tension and heart rate decreased in the BPD group. Our preliminary results support the hypothesis that tissue damage may play a role in disturbed stress regulation in BPD.
Journal of personality disorders 08/2012; 26(4):605-15. · 3.08 Impact Factor
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ABSTRACT: CONTEXT Recent neuroimaging studies have associated activity in the default mode network (DMN) with self-referential and pain processing, both of which are altered in borderline personality disorder (BPD). In patients with BPD, antinociception has been linked to altered activity in brain regions involved in the cognitive and affective evaluation of pain. Findings in healthy subjects indicate that painful stimulation leads to blood oxygenation level-dependent signal decreases and changes in the functional architecture of the DMN. OBJECTIVES To connect the previously separate research areas of DMN connectivity and altered pain perception in BPD and to explore DMN connectivity during pain processing in patients with BPD. DESIGN Case-control study. SETTING University hospital. PARTICIPANTS Twenty-five women with BPD, including 23 (92%) with a history of self-harm, and 22 age-matched control subjects. INTERVENTIONS Psychophysical assessment and functional magnetic resonance imaging during painful heat vs neutral temperature stimulation. MAIN OUTCOME MEASURE Connectivity of DMN as assessed via independent component analysis and psychophysiological interaction analysis. RESULTS Compared with control subjects, patients with BPD showed less integration of the left retrosplenial cortex and left superior frontal gyrus into the DMN. Higher BPD symptom severity and trait dissociation were associated with an attenuated signal decrease of the DMN in response to painful stimulation. During pain vs neutral, patients with BPD exhibited less posterior cingulate cortex seed region connectivity with the left dorsolateral prefrontal cortex. CONCLUSIONS Patients with BPD showed significant alterations in DMN connectivity, with differences in spatial integrity and temporal characteristics. These alterations may reflect a different cognitive and affective appraisal of pain as less self-relevant and aversive as well as a deficiency in the switching between baseline and task-related processing. This deficiency may be related to everyday difficulties of patients with BPD in regulating their emotions, focusing mindfully on 1 task at a time, and efficiently shifting their attention from one task to another.
Archives of general psychiatry 06/2012; · 12.26 Impact Factor
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ABSTRACT: Context: Recent neuroimaging studies have associated activity in the default mode network (DMN) with self-referential and pain processing, both of which are al-tered in borderline personality disorder (BPD). In pa-tients with BPD, antinociception has been linked to altered activity in brain regions involved in the cognitive and af-fective evaluation of pain. Findings in healthy subjects indicate that painful stimulation leads to blood oxygen-ation level–dependent signal decreases and changes in the functional architecture of the DMN. Objectives: To connect the previously separate re-search areas of DMN connectivity and altered pain per-ception in BPD and to explore DMN connectivity dur-ing pain processing in patients with BPD. Participants: Twenty-five women with BPD, includ-ing 23 (92%) with a history of self-harm, and 22 age-matched control subjects. Interventions: Psychophysical assessment and func-tional magnetic resonance imaging during painful heat vs neutral temperature stimulation. Main Outcome Measure: Connectivity of DMN as as-sessed via independent component analysis and psycho-physiological interaction analysis. Results: Compared with control subjects, patients with BPD showed less integration of the left retrosplenial cor-tex and left superior frontal gyrus into the DMN. Higher BPD symptom severity and trait dissociation were asso-ciated with an attenuated signal decrease of the DMN in response to painful stimulation. During pain vs neutral, patients with BPD exhibited less posterior cingulate cor-tex seed region connectivity with the left dorsolateral prefrontal cortex. Conclusions: Patients with BPD showed significant al-terations in DMN connectivity, with differences in spatial integrity and temporal characteristics. These alterations may reflect a different cognitive and affective appraisal of pain as less self-relevant and aversive as well as a deficiency in the switching between baseline and task-related process-ing. This deficiency may be related to everyday difficulties of patients with BPD in regulating their emotions, focus-ing mindfully on 1 task at a time, and efficiently shifting their attention from one task to another.
Archives of General Psychiatry 06/2012; · 12.02 Impact Factor
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ABSTRACT: The availability of effective laboratory paradigms for inducing psychological stress is an important requirement for experimental stress research. Reliable protocols are scarce, usually laborious and manpower-intensive. In order to develop an economical, easily applicable standardized stress protocol, we have recently tailored the Mannheim Multicomponent Stress Test (MMST). This test has been shown to induce relatively high stress responses without focusing on social-evaluative components. In this study we evaluated changes in electrodermal activity and salivary cortisol in response to the MMST. The MMST simultaneously combines cognitive (mental arithmetic), emotional (affective pictures), acoustic (white noise) and motivational stressors (loss of money). This study comprised two independent experiments. For experiment 1, 80 female subjects were recruited; 30 subjects (15 females) participated in experiment 2. Significant changes in electrodermal activity and salivary cortisol levels in response to MMST exposure were found. Subjective stress and heart rate responses were significantly increased in both experiments. These results indicate that the MMST is an economical stress paradigm which is also applicable in larger cohorts or multicenter studies for investigating stress reactions. As social-evaluative threat is not the main stress component of the MMST, this procedure represents a useful and complementary alternative to other established stress protocols.
Psychiatry research. 03/2012; 198(1):106-11.
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Christian Schmahl,
Nikolaus Kleindienst,
Matthias Limberger,
Petra Ludäscher,
Jana Mauchnik,
Peter Deibler,
Sonja Brünen,
Christoph Hiemke,
Klaus Lieb,
Sabine Herpertz,
Markus Reicherzer,
Mathias Berger,
Martin Bohus
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ABSTRACT: Data from a pilot study suggest that naltrexone might reduce dissociative symptoms in patients with borderline personality disorder. However, the interpretation of these data is limited by the lack of a control group and by the nonblind nature of this study. Hence, we examined the effects of naltrexone using a more rigorous design that controlled for major confounders such as spontaneous reduction of dissociation over time and placebo effects. Unmedicated patients with BPD [according to Diagnostic and Statistical Manual of Mental Disorders-IVth edition (DSM-IV)] were included in two small double-blind placebo-controlled randomized trials (total n=29). Patients received both 3 weeks of naltrexone (50 or 200 mg/day) and 3 weeks of placebo in a randomized order. Twenty-five patients completed the study according to protocol. Dissociation under naltrexone and placebo, respectively, was compared by repeated-measures analyses of variance. In either trial, both the intensity and duration of dissociative symptoms were numerically lower under naltrexone than under placebo. However, the effects were too small to reach statistical significance. Our data provide the first estimate of the pure pharmacological antidissociative efficacy of naltrexone from a rigorously designed trial.
International clinical psychopharmacology 01/2012; 27(1):61-8. · 3.35 Impact Factor
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ABSTRACT: Affective instability and self-injurious behavior are important features of Borderline Personality Disorder. Whereas affective instability may be caused by a pattern of limbic hyperreactivity paired with dysfunctional prefrontal regulation mechanisms, painful stimulation was found to reduce affective arousal at the neural level, possibly underlying the soothing effect of pain in BPD.We used psychophysiological interactions to analyze functional connectivity of (para-) limbic brain structures (i.e. amygdala, insula, anterior cingulate cortex) in Borderline Personality Disorder in response to painful stimulation. Therefore, we re-analyzed a dataset from 20 patients with Borderline Personality Disorder and 23 healthy controls who took part in an fMRI-task inducing negative (versus neutral) affect and subsequently applying heat pain (versus warmth perception).Results suggest an enhanced negative coupling between limbic as well as paralimbic regions and prefrontal regions, specifically with the medial and dorsolateral prefrontal cortex, when patients experienced pain in addition to emotional arousing pictures. When neutral pictures were combined with painful heat sensation, we found positive connectivity in Borderline Personality Disorder between (para-)limbic brain areas and parts of the basal ganglia (lentiform nucleus, putamen), as well areas involved in self-referential processing (precuneus and posterior cingulate).We found further evidence for alterations in the emotion regulation process in Borderline Personality Disorder, in the way that pain improves the inhibition of limbic activity by prefrontal areas. This study provides new insights in pain processing in BPD, including enhanced coupling of limbic structures and basal ganglia.
PLoS ONE 01/2012; 7(3):e33293. · 4.09 Impact Factor
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ABSTRACT: A functional polymorphism (val158met) of the gene coding for Catechol-O-methyltransferase (COM) has been demonstrated to be related to processing of emotional stimuli. Also, this polymorphism has been found to be associated with pain regulation in healthy subjects. Therefore, we investigated a possible influence of this polymorphism on pain processing in healthy persons as well as in subjects with markedly reduced pain sensitivity in the context of Borderline Personality Disorder (BPD). Fifty females (25 patients with BPD and 25 healthy control participants) were included in this study. Genotype had a significant--though moderate--effect on pain sensitivity, but only in healthies. The number of val alleles was correlated with the BOLD response in several pain-processing brain regions, including dorsolateral prefrontal cortex, posterior parietal cortex, lateral globus pallidus, anterior and posterior insula. Within the subgroup of healthy participants, the number of val alleles was positively correlated with the BOLD response in posterior parietal, posterior cingulate, and dorsolateral prefrontal cortex. BPD patients revealed a positive correlation between the number of val alleles and BOLD signal in anterior and posterior insula. Thus, our data show that the val158met polymorphism in the COMT gene contributes significantly to inter-individual differences in neural pain processing: in healthy people, this polymorphism was more related to cognitive aspects of pain processing, whereas BPD patients with reduced pain sensitivity showed an association with activity in brain regions related to affective pain processing.
PLoS ONE 01/2012; 7(1):e23658. · 4.09 Impact Factor
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ABSTRACT: A substantial proportion of Borderline Personality Disorder (BPD) patients respond by a marked decrease of psychopathology when treated with Dialectical Behavioral Therapy (DBT). To further enhance the rate of DBT-response, it is useful to identify characteristics related to unsatisfactory response. As DBT relies on emotional learning, we explored whether dissociation-which is known to interfere with learning- predicts poor response to DBT. Fifty-seven Borderline Personality Disorder (BPD) patients (DSM-IV) were prospectively observed during a three-month inpatient DBT program. Pre-post improvements in general psychopathology (SCL-90-R) were predicted from baseline scores of the Dissociative Experiences Scale (DES) by regression models accounting for baseline psychopathology. High DES-scores were related to poor pre-post improvement (β = -0.017 ± 0.006, p = 0.008). The data yielded no evidence that some facets of dissociation are more important in predicting DBT-response than others. The results suggest that dissociation in borderline-patients should be closely monitored and targeted during DBT. At this stage, research on treatment of dissociation (e.g., specific skills training) is warranted.
Journal of personality disorders 08/2011; 25(4):432-47. · 3.08 Impact Factor
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ABSTRACT: In a pilot study, affective components of pain were assessed using repetitive peripheral magnetic stimulation (rPMS) in patients with borderline personality disorder and healthy controls. Significant differences in pain thresholds and in affective components of pain between both groups were found. rPMS was well tolerated and suitable for assessing pain.
Psychiatry Research 04/2011; 186(2-3):458-60. · 2.52 Impact Factor
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ABSTRACT: Borderline personality disorder has been characterized by enhanced emotional reactivity and deficient emotion regulation in behavioral and functional imaging studies. We aimed to validate patients' difficulties in the cognitive regulation of negative emotions and investigated if emotion regulation deficits are restricted to the decrease of negative emotions. A cognitive reappraisal paradigm was used and hence a regulation strategy that is typically applied in cognitive-behavioral therapy.
Fifteen unmedicated female borderline patients with affective instability and 15 healthy female control subjects underwent functional magnetic resonance imaging during a delayed reappraisal paradigm. Hemodynamic responses were measured in response to aversive pictures in an initial viewing phase and a subsequent reappraisal phase with three different conditions: decreasing, increasing, and maintaining the initial emotional reaction.
Patients demonstrated enhanced activation of left amygdala and right insula during the initial viewing of aversive stimuli. During attempting to decrease the initial emotional reaction, patients showed attenuated activation of the left orbitofrontal cortex and increased activation of the bilateral insula. The attempt to increase negative emotions resulted in enhanced activity in amygdala and insula, whereas no group differences were found.
The results point to the role of two distinguishable processes of emotional difficulties in borderline personality disorder: enhanced emotional reactivity as well as deficits of voluntarily decreasing aversive emotions by means of cognitive reappraisal. The results suggest the neuronal substrate of deficits in explicit emotion regulation in the orbitofrontal cortex, which is in line with previous findings of a dysfunctional prefrontal network in borderline personality disorder.
Biological psychiatry 12/2010; 69(6):564-73. · 8.93 Impact Factor
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ABSTRACT: Disgust may be a key emotion and target for psychotherapeutic interventions in borderline personality disorder (BPD) and posttraumatic stress disorder (PTSD) at explicit and implicit-automatic levels. However, automatically activated disgust reactions in individuals with these disorders have not been studied. Disgust and its correlation with childhood abuse were assessed in women with BPD, but without PTSD; women with PTSD, but without BPD; women with BPD and PTSD; and healthy women. Disgust sensitivity, anxiety and depression were measured by self-report. Implicit disgust-prone (relative to anxiety-prone) self-concept was assessed using the Implicit Association Test. Women with BPD and/or PTSD reported more disgust sensitivity than controls. The implicit self-concept among patients was more disgust-prone (relative to anxiety-prone) than in controls. Women with BPD, with PTSD, or BPD and PTSD did not differ significantly in self-reported disgust levels or implicit disgust-related self-concept. Among women with BPD and/or PTSD, current psychiatric comorbidity (major depression, anxiety disorder, eating disorder, or substance-related disorder) did not affect disgust-related variables. More severe physical abuse in childhood was associated with a more anxiety-prone (less disgust-prone) implicit self-concept. Independent of psychiatric comorbidity, disgust appears to be elevated at implicit and explicit levels in trauma-related disorders. Psychotherapeutic approaches to address disgust should take implicit processes into account.
Archiv f ur Psychiatrie und Nervenkrankheiten 12/2010; 261(5):369-76. · 2.75 Impact Factor
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ABSTRACT: Dysfunction and deficits in the structure of the anterior cingulate cortex have been reported in borderline personality disorder (BPD). To our knowledge, there is only 1 published study to date investigating anterior cingulate cortex metabolism in subjects with BPD and co-occurring attention-deficit/hyperactivity disorder using proton magnetic resonance spectroscopy. Impulsivity is a key feature of BPD and can be related to anterior cingulate cortex function.
To investigate whether anterior cingulate cortex metabolism may be altered in BPD and correlates with BPD pathology.
Cross-sectional proton magnetic resonance spectroscopy study.
Department of Psychosomatic Medicine and Psychotherapy, Central Institute of Mental Health, Mannheim, Germany. PARTICIPANTS AND PATIENTS: Thirty unmedicated female subjects meeting DSM-IV criteria for BPD and 31 age-matched healthy female control participants.
Neurometabolite concentrations in the anterior cingulate cortex and correlation of glutamate levels with self-reported measures of impulsivity and severity of borderline symptoms.
Significantly higher levels of glutamate in the anterior cingulate cortex were found in subjects with BPD as compared with healthy controls. A positive correlation between glutamate concentration and the Barratt Impulsiveness Scale total score as well as between glutamate concentration and the subscore for cognitive impulsivity were observed irrespective of diagnosis. We also found a positive correlation between glutamate concentrations and dissociation as well as between glutamate concentration and subscores of the Borderline Symptom List in the patient group.
Our results support the hypothesis that higher glutamate concentration in the anterior cingulate cortex is associated with both severity of BPD symptoms and subjective impulsivity ratings, the latter independent of BPD. Further studies should confirm the association between enhanced glutamate concentration in the anterior cingulate cortex and behavioral measures of impulsivity.
Archives of general psychiatry 09/2010; 67(9):946-54. · 12.26 Impact Factor
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ABSTRACT: Patients with borderline personality disorder (BPD) experience intense emotions and often show a deficiency of emotion regulation skills. Moreover, they display high prevalence rates of self-injurious behavior. Patients report engaging in self-injurious behavior due to its immediate relief effects of emotional tension. Pain in BPD has further been observed to lead to a reduction in neural activity in the amygdala and anterior cingulate cortex, which may be attributed to patients' perception of relaxation.
To investigate the potential role of self-inflicted pain as a means of affect regulation in patients with BPD, we conducted a functional magnetic resonance imaging study using picture stimuli to induce negative (vs. neutral) affect and thermal stimuli to induce heat pain (vs. warmth perception). The painful heat stimuli were administrated at an individual temperature for each subject. Twenty patients with BPD and 23 healthy control subjects were included in the study.
Both negative and neutral pictures led to stronger activation of the amygdala, insula, and anterior cingulate cortex in patients with BPD than in healthy control subjects. Amygdala activation correlated with self-reported deficits in emotion regulation. During the sensory stimulation, we found decreased amygdala and anterior cingulate cortex activation, which was independent of painfulness.
The results are in line with previous findings on emotional hyperactivity in BPD and suggest that pain stimuli in BPD are processed differently depending on the arousal status. Finally, we can preliminarily support the idea of a general mechanism of attentional shift underlying the soothing effect of pain in BPD.
Biological psychiatry 08/2010; 68(4):383-91. · 8.93 Impact Factor
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ABSTRACT: Stress-induced dissociative states involving analgesia are a common feature of borderline personality disorder (BPD) and posttraumatic stress disorder (PTSD). Our aim was to investigate the psychologic, somatosensory (pain sensitivity) and neural correlates of dissociative states in patients with these disorders.
We included 15 women with BPD who were not taking medication; 10 of these women had comorbid PTSD. While undergoing functional magnetic resonance imaging at 1.5 Tesla, participants were exposed to a script describing a personalized dissociation-inducing situation and a personalized script describing a neutral situation. We assessed dissociative psychopathology and pain sensitivity.
Dissociative psychopathology scores were significantly higher and pain sensitivity was lower after the dissociation-inducing script was read compared with the neutral script. The blood oxygen level-dependent (BOLD) signal was significantly increased in the left inferior frontal gyrus (Brodmann area [BA] 9) during the presentation of the dissociation-inducing script. Regression analyses revealed positive correlations between BOLD signal and dissociative psychopathology in the left superior frontal gyrus (BA 6) and negative correlations in the right middle (BA 21) and inferior temporal gyrus (BA 20). In the subgroup of participants with comorbid PTSD, we also found increased activity in the left cingulate gyrus (BA 32) during script-driven imagery-induced dissociation, a positive correlation between dissociation scores and activity in the right and left insula (BA 13) and a negative correlation in the right parahippocampal gyrus (BA 35).
The main limitation of this pilot study is the absence of a control group. Therefore, the results may also reflect the neural correlates of non-BPD/PTSD specific dissociative states or the neural correlates of emotionally stressful or "loaded" memories. Another limitation is the uncorrected statistical level of the functional magnetic resonance imaging results.
Our results showed that the script-driven imagery method is capable of inducing dissociative states in participants with BPD with and without comorbid PTSD. These states were characterized by reduced pain sensitivity and a frontolimbic activation pattern, which resembles the findings in participants with PTSD while in dissociative states.
Journal of psychiatry & neuroscience: JPN 05/2010; 35(3):177-84. · 5.34 Impact Factor
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Christian Stiglmayr,
Patricia Schimke,
Till Wagner,
Diana Braakmann,
Ulrich Schweiger,
Valerija Sipos,
Thomas Fydrich, Christian Schmahl,
Ulrich Ebner-Priemer,
Nikolaus Kleindienst,
Jeannette Bischkopf,
Anna Auckenthaler,
Thorsten Kienast
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ABSTRACT: The newly developed Dissoziations-Spannungs-Skala (Dissociation Tension Scale; DSS) is a self-rating instrument for the assessment of psychological and somatoform dissociative features (ranging from normal up to pathological) as well as aversive inner tension occurring within the past 7 days. The DSS contains 21 items assessing dissociative symptoms and 1 additional item assessing aversive inner tension. Ratings are made on a time-oriented scale ranging from 0% (never) to 100% (constantly). We measured the psychometric qualities of the DSS in a total of 294 patients and healthy controls. Internal consistency of the DSS was high (Cronbach's alpha = .92; Gutmann's split-half r = .92). We found good support for convergent, discriminant, and differential validity. There was clear evidence for the DSS being a sensitive instrument for the assessment of changing symptomatology. Assessment of dissociation and other psychopathological features over the same period of time are now possible.
Journal of Personality Assessment 05/2010; 92(3):269-77. · 1.29 Impact Factor
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ABSTRACT: In this article, the authors present evidence regarding a dissociative subtype of PTSD, with clinical and neurobiological features that can be distinguished from nondissociative PTSD. The dissociative subtype is characterized by overmodulation of affect, while the more common undermodulated type involves the predominance of reexperiencing and hyperarousal symptoms. This article focuses on the neural manifestations of the dissociative subtype in PTSD and compares it to those underlying the reexperiencing/hyperaroused subtype. A model that includes these two types of emotion dysregulation in PTSD is described. In this model, reexperiencing/hyperarousal reactivity is viewed as a form of emotion dysregulation that involves emotional undermodulation, mediated by failure of prefrontal inhibition of limbic regions. In contrast, the dissociative subtype of PTSD is described as a form of emotion dysregulation that involves emotional overmodulation mediated by midline prefrontal inhibition of the same limbic regions. Both types of modulation are involved in a dynamic interplay and lead to alternating symptom profiles in PTSD. These findings have important implications for treatment of PTSD, including the need to assess patients with PTSD for dissociative symptoms and to incorporate the treatment of dissociative symptoms into stage-oriented trauma treatment.
American Journal of Psychiatry 04/2010; 167(6):640-7. · 12.54 Impact Factor
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ABSTRACT: This review provides an overview of the most recent neuroimaging findings in borderline personality disorder. The contributions of the structural and functional imaging studies of the past 3 years are presented to help us better understand this severe psychiatric disorder. There are three domains of functional imaging findings: 1) affective dysregulation; 2) the complex of dissociation, self-injurious behavior, and pain processing; and 3) social interaction. Knowledge of the neurobiological basis of borderline personality disorder has grown considerably. Therefore, these findings convey a good impression of the current findings from neuroimaging research in this disorder and also of the necessary next steps with regard to content and methodology.
Current Psychiatry Reports 02/2010; 12(1):46-55. · 2.71 Impact Factor
