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Institute
- Klinik und Poliklinik für Psychiatrie, Psychosomatik und Psychotherapie (469) (remove)
Sonstige beteiligte Institutionen
- Clinical Trial Center (CTC) / Zentrale für Klinische Studien Würzburg (ZKSW) (2)
- Department of Nuclear Medicine, Kanazawa University (1)
- Institut für Biopsychologie, Universität Dresden (1)
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- Johns Hopkins University School of Medicine (1)
- Maastricht University, Department of Psychiatry and Neuropsychology (1)
- Translationale soziale Neurowissenschaften (1)
ResearcherID
- N-8985-2015 (1)
Die ängstliche Depression stellt einen Subtypus der Depression dar, der noch nicht ausreichend erforscht ist und somit eine Herausforderung im klinischen Alltag darstellt. Laut der bisherigen Literatur sind genetische Unterschiede sowie Kindheitstraumatisierungen an der Pathophysiologie von Depressionen beteiligt und mitverantwortlich für die Ausprägung des Subtypus ängstliche Depression.
In dieser Untersuchung wurde erforscht, ob es unterschiedliche Genexpressionslevel des Gens NR3C1 zwischen ängstlich-depressiven und nicht-ängstlich-depressiven Personen gibt. Zusätzlich wurde geprüft, ob Kindheitstraumatisierungen einen weiteren Einfluss auf die Genexpression der beiden Subtypen der Depression haben.
Es zeigte sich, dass ängstlich-depressive Personen in Woche 1 bis 4 höhere HAM-D-Summenwerte erzielten, mit zusätzlichen Kindheitstraumatisierungen wurden die höchsten HAM-D-Werte festgestellt. Diese Gruppe hatte gehäuft Kindheitstraumata im Fragebogen angegeben, die Traumata Emotionale Misshandlung und Körperliche Vernachlässigung kamen signifikant häufiger vor.
Anhand dieser durchgeführten Studie konnten zusammengefasst werden, dass sich die Genexpressionslevel von NR3C1 zwischen den beiden Subtypen als unterschiedlich erwies. Zusätzlich scheinen die beiden Kindheitstraumata Emotionale Misshandlung und Körperliche Vernachlässigung einen weiteren Einfluss auf die Genexpression von NR3C1 zu haben.
Die unterschiedliche Genexpression von NR3C1 deutet auf verschiedene Funktionsweisen des GR zwischen den Subtypen hin. Dies könnte für die Verlaufsbeurteilung und Therapieansätze der Erkrankung von Bedeutung sein. Die häufiger vorkommenden Kindheitstraumatisierungen bei ängstlich-depressiven Personen können als ein pathophysiologischer Baustein für die Entstehung der ängstlichen Depression gesehen werden. Daher ist es umso wichtiger, das Überprüfen von erlebten Kindheitstraumata bei initialer Befragung in den klinischen Alltag mitaufzunehmen. Da auch der Depressionsschweregrad durch Kindheitstraumatisierungen in dieser Studie zunahm, ergeben sich daraus mögliche Konsequenzen für die therapeutische Planung.
Schwangerschaft und Stillzeit gehen mit erheblichen metabolischen Veränderungen des mütterlichen Organismus einher. Bis dato ist über die Pharmakokinetik von Psychopharmaka in dieser Zeit wenig bekannt. In unserer naturalistischen Beobachtungsstudie untersuchten wir 61 Frauen hinsichtlich der Dynamik psychotroper Medikamente innerhalb der Schwangerschaft und Stillzeit im Serum und teils in der Muttermilch. Zudem erhoben wir Eckdaten der Entwicklung der exponierten Kinder innerhalb des ersten Lebensjahres.
Bis auf Citalopram stellten wir bei allen analysierten Medikamenten Spiegelabfälle in der Schwangerschaft fest: vom ersten zum zweiten Trimenon fielen die Spiegel bei Escitalopram, Sertralin, Duloxetin, Amitriptylin, Clomipramin und Quetiapin. Während wir in der Spätschwangerschaft bei Escitalopram, Venlafaxin, Clomipramin, Mirtazapin, Aripiprazol und Quetiapin eine weitere Reduktion der Serumkonzentrationen protokollierten, blieben die Spiegel von Amitriptylin stabil, die Sertralin-Spiegel erholten sich sogar partiell. Citalopram zeigte keine Änderung der Serumspiegel. Direkt postpartal kam es bei allen Medikamenten zu einem Spiegelanstieg. Im postpartalen Verlauf zeigten die einzelnen Medikamente widersprüchliche Dynamiken. Hohe Penetrationsraten in die Muttermilch wiesen Escitalopram und Venlafaxin auf; Duloxetin, Clomipramin und Quetiapin gingen kaum bzw. nicht in die Muttermilch über. Wir fanden keine signifikanten Unterschiede zwischen in utero nicht exponierten zu exponierten Kindern bezüglich Geburtsparametern wie Schwangerschaftswoche, Körpermaße oder APGAR-Wert. Während die nicht exponierten Kinder vermehrt unter leichten Auffälligkeiten direkt postpartal litten, wiesen die exponierten Neugeborenen mehr mittelschwere Auffälligkeiten auf. Hinsichtlich der Entwicklung innerhalb des ersten Lebensjahres (gemessen an groben Entwicklungsmeilensteinen) ergaben sich keine signifikanten Unterschiede.
Im klinischen Alltag trägt das Therapeutische Drug Monitoring als indirekte Methode zur Kontrolle aller an der Metabolisierung beteiligten Faktoren enorm zur Steigerung der Sicherheit und Effektivität der individuellen Pharmakotherapie bei. Die pharmakokinetische Dynamik fällt bei manchen Medikamenten jedoch interindividuell sehr unterschiedlich aus (insbesondere bei Sertralin); hier stellt eine initiale Genotypisierung der Cytochrom-P450-Enzyme ein großes Potential dar, um bereits zu Beginn einer Schwangerschaft über die voraussichtliche pharmakokinetische Dynamik im Bilde zu sein und möglicher Unter- bzw. Überdosierung mit potentiell fruchtschädigender Wirkung vorbeugen zu können.
Auswirkungen der Genpolymorphismen ASIC1, BDNF und NPSR1 auf die Antizipationsphase aversiver Reize
(2024)
In dieser Arbeit wurden einerseits die Antizipationsphasen von aversiven gegenüber neutralen Reizen anhand von Messungen der Hautleitfähigkeit und der Startle-Reaktion untersucht. Andererseits wurde die Hautleitfähigkeit auch während der Präsentation aversiver und neutraler Reize mit dem Ziel gemessen, signifikante Unterschiede festzustellen. Insbesondere wurden die Auswirkungen der Allele der Gene ASIC1 und der Interaktion der Genallele BDNF und NPSR1 betrachtet.
Ziel der vorliegenden Arbeit war es, den Einfluss der Risikogene auf die physiologische Angstreaktion und die subjektive Angstwahrnehmung zu untersuchen. Hierzu wurden den genotypisierten Probanden aversive und neutrale Videos präsentiert. Vor jedem Video erfolgte die Ankündigung, ob es sich um ein neutrales oder aversives Video handelt, wodurch bei Letzterem im Allgemeinen antizipatorische Angst – Erwartungsangst – hervorgerufen wird.
Im Vergleich der Antizipationsphase vor Darbietung aversiver Videos mit der Antizipationsphase vor neutralen Videos konnte eine erhöhte Startle-Amplitude gemessen werden. Jedoch konnte weder anhand der Veränderung der Hautleitfähigkeit noch anhand der Startle-Amplitude ein signifikanter Unterschied bei Trägern und Nicht- Trägern der Risikogenallelen in der Antizipationsphase festgestellt werden. Während der Präsentation der Videos konnte für die aversiven Videos im Vergleich zu den neutralen eine erhöhte Hautleitfähigkeit gemessen werden. Ebenfalls konnte bei der Darbietung von aversiven Videos bei den Trägern der Genallel-Interaktion NPSR1 AT/TT * BDNF GG und den Trägern des Risikogenallels ASIC1TT eine erhöhte Hautleitfähigkeit gemessen werden. So konnte mit den Ergebnissen dieser Arbeit belegt werden, dass Antizipationsangst auslösbar und anhand der Startle-Amplitude messbar ist.
Um Antizipationsangst festzustellen oder diese bei Risikogenallel-Träger zu untersuchen, waren die Ergebnisse bezüglich der Hautleitfähigkeit jedoch weniger aussagekräftig als erwartet.
Allgemein konnte die Interaktion NPSR1 AT/TT * BDNF GG und ASIC1 TT als Risikogenallele bezüglich einer verstärken Reaktion auf aversive Reize bestätigt werden. Weitere Studien sind notwendig, um die genetische Komponente von Angst und damit auch von Angsterkrankungen näher zu beleuchten, damit zukünftige Diagnostik- und Therapieansätze präzise entwickelt werden können.
Emotional-associative learning processes such as fear conditioning and extinction are highly relevant to not only the development and maintenance of anxiety disorders (ADs), but also to their treatment. Extinction, as the laboratory analogue to behavioral exposure, is assumed a core process underlying the treatment of ADs. Although exposure-based treatments are highly effective for the average patient suffering from an AD, there remains a gap in treatment efficacy with over one third of patients failing to achieve clinically significant symptom relief. There is ergo a pressing need for intensified research regarding the underlying neural mechanisms of aberrant emotional-associative learning processes and the neurobiological moderators of treatment (non-)response in ADs.
The current thesis focuses on different applications of the fundamental principles of fear conditioning and extinction by using two example cases of ADs from two different multicenter trials. First, we targeted alterations in fear acquisition, extinction, and its recall as a function of psychopathology in panic disorder (PD) patients compared to healthy subjects using fMRI. Second, exposure-based therapy and pre-treatment patient characteristics exerting a moderating influence on this essential learning process later on (i.e. treatment outcome) were examined using multimodal functional and structural neuroimaging in spider phobia.
We observed aberrations in emotional-associative learning processes in PD patients compared to healthy subjects indicated by an accelerated fear acquisition and an attenuated extinction recall. Furthermore, pre-treatment differences related to defensive, regulatory, attentional, and perceptual processes may exert a moderating influence on treatment outcome to behavioral exposure in spider phobia. Although the current results need further replication, on an integrative meta level, results point to a hyperactive defensive network system and deficient emotion regulation processes (including extinction processes) and top-down control in ADs. This speaks in favor of transdiagnostic deficits in important functional domains in ADs.
Deficits in transdiagnostic domains such as emotion regulation processes could be targeted by enhancing extinction learning or by means of promising tools like neurofeedback. The detection of pre-treatment clinical response moderators, for instance via machine learning frameworks, may help in supporting clinical decision making on individually tailored treatment approaches or, respectively, to avoid ineffective treatment and its related financial costs. In the long run, the identification of neurobiological markers which are capable of detecting non-responders a priori represents an ultimate goal.
Empathy, the act of sharing another person’s affective state, is a ubiquitous driver for helping others and feeling close to them. These experiences are integral parts of human behavior and society. The studies presented in this dissertation aimed to investigate the sustainability and stability of social closeness and prosocial decision-making driven by empathy and other social motives. In this vein, four studies were conducted in which behavioral and neural indicators of empathy sustainability were identified using model-based functional magnetic resonance imaging (fMRI).
Applying reinforcement learning, drift-diffusion modelling (DDM), and fMRI, the first two studies were designed to investigate the formation and sustainability of empathy-related social closeness (study 1) and examined how sustainably empathy led to prosocial behavior (study 2). Using DDM and fMRI, the last two studies investigated how empathy combined with reciprocity, the social norm to return a favor, on the one hand and empathy combined with the motive of outcome maximization on the other hand altered the behavioral and neural social decision process.
The results showed that empathy-related social closeness and prosocial decision tendencies persisted even if empathy was rarely reinforced. The sustainability of these empathy effects was related to recalibration of the empathy-related social closeness learning signal (study 1) and the maintenance of a prosocial decision bias (study 2). The findings of study 3 showed that empathy boosted the processing of reciprocity-based social decisions, but not vice versa. Study 4 revealed that empathy-related decisions were modulated by the motive of outcome maximization, depending on individual differences in state empathy.
Together, the studies strongly support the concept of empathy as a sustainable driver of social closeness and prosocial behavior.
Fear and anxiety disorders – interaction of AVP and OXT brain systems with the serotonergic system
(2023)
Anxiety disorders pose a great burden onto society and economy and can have devastating consequences for affected individuals. Treatment options are still limited to psychopharmacotherapy originally developed for the treatment of depression and behavioral therapy. A combination of genetic traits together with aversive events is most likely the cause of these diseases. Gene x environment studies are trying to find a link between genetic traits and specific negative circumstances. In a first study, we focused on social anxiety disorder (SAD), which is the second most-common anxiety disorder after specific phobias. We used a social fear conditioning (SFC) paradigm, which is able to mimic the disease in a mouse model. We wanted to investigate protein levels, as well as mRNA expression of immediate early genes (IEGs), to determine brain areas affected by the paradigm. We also included genes of the vasopressin (AVP)-, oxytocin (OXT)-, neuropeptide Y (NPY)-, and the serotonin system, to investigate the effects of SFC on neurotransmitter gene expression levels in brain regions related to social as well as fear-related behavior. AVP and OXT regulate a lot of different social and anxiety-related behaviors, both positive and negative. Finding a link between different neurotransmitter systems in the development of anxiety disorders could help to identify potential targets for new treatment approaches, which are desperately needed, because the rate of patients not responding to available treatment is very high.
We were able to show altered gene expression of the IEGs cFos and Fosl2, as well as a change in number and density of cFOS-positive cells in the dorsal hippocampus, indicating an influence of SFC on neuronal activity. Our results reveal a possible involvement of anterior dentate gyrus (DG), as well as cornu ammonis area 1 (CA1) and CA3 in the dorsal hippocampus during the expression of social fear. Contrary to our hypothesis, we were not able to see changes in neuronal activity through expression changes of IEGs in the amygdala. Significant higher IEG immunoreactivity and gene expression in the dorsal hippocampus of animals without fear conditioning (SFC-), compared to animals with fear conditioning (SFC+), indicate an involvement of different hippocampal regions in two possible scenarios. Either as elevated gene expression in SFC- animals compared to SFC+ animals or as reduction in SFC+ animals compared to SFC- animals. However, this question cannot be answered without an additional control of basal IEG-activity without social interaction. The NPY system in general and the neuropeptide y receptor type 2 in particular seem to be involved in regulating the response to social fear, mostly through the septum region. In addition to that, a possible role for the induction of social fear response could be identified in the serotonergic system and especially the serotonin receptor 2a of the PVN.
In a second study we focused on changes in the serotonergic system. A polymorphism in the human serotonin transporter (5-HTT) gene is associated with higher risks for the development of anxiety disorders. This makes the 5-HTT a widely used target to study possible causes and the development of anxiety disorders. In mice, a genetically induced knockout of the 5-Htt gene is associated with increased anxiety-like behavior. High amounts of stress during pregnancy, also known as prenatal stress, significantly increase the risk to develop psychiatric disorders for the unborn child. We utilized a prenatal stress paradigm in mice heterozygous for the 5-Htt gene. Some of the animals which had been subjected to prenatal stress showed noticeably “unsocial” interaction behavior towards conspecifics. Again, we were searching for links between the serotonergic system and AVP- and OXT systems. Through quantitative gene expression analysis, we were able to show that both AVP and OXT neuromodulator systems are affected through prenatal stress in female mice, but not in male mice. The 5-Htt genotype seems to be only slightly influential to AVP, OXT or any other neurotransmitter system investigated. Gene expression of AVP and OXT brain systems is highly influenced through the estrous cycle stages of female mice. Additionally, we analyzed the AVP and OXT neuropeptide levels of mice with different 5-Htt genotypes and in both sexes, in order to see whether the production of AVP and OXT is influenced by 5-Htt genotype. On neuropeptide level, we were able to identify a sex difference for vasopressin-immunoreactive (ir) cells in the PVN, with male mice harboring significantly more positive cells than female mice.
Bereits in vorausgegangenen Studien konnte nachgewiesen werden, dass das Stathmin-Gen eine entscheidende Rolle im Hinblick auf erlernte und angeborene Angstreaktionen spielt. So konnte Frau Dr. Julia Katharina Heupel in ihrer Arbeit aus dem Jahr 2013 eine Assoziation eines (TAA)n-Polymorphismus, welcher sich ca. 2 kb upstream des ersten Exons des Stathmin-Gens und ca. 4 kb upstream des Translationsstarts befindet, mit Cluster-C-Persönlichkeitsstörungen belegen.
Sie vermutete, dass eine Hochregulation der Expression des Stathmin-Gens ein Risikofaktor für die Entstehung von Cluster C Persönlichkeitsstörungen darstellen könnte.
Da sich der beschriebene Polymorphismus in der Promotor-Region des Stathmin-Gens befindet, ist eine allelspezifische Auswirkung auf die Genexpression vorstellbar. Um diese Vermutung zu stützen, wurde in dieser Arbeit die Auswirkung zweier Allele des STR-Polymorphismus im Bereich der Promotorregion des Stathmin-Gens im Hinblick auf die Promotoraktivität untersucht.
Hierzu wurde die zu untersuchende Sequenz zunächst mittels Polymerase-Ketten-Reaktion vervielfältigt und anschließend in einen pGL4.23.Vektor kloniert.
Im Anschluss daran erfolgte die Untersuchung der Promotoraktivität mittels eines Luciferase-Assays in der humanen Neuroblastomzelllinie SH-SY5Y.
Nach statischer Auswertung der Messreihen zeigte sich eine signifikant höhere Luciferase-Aktivität des STR-Polymorphismus (TAA)12 im Vergleich zu dem STR-Polymorphismus (TAA)13.
Hierdurch kann von einer höheren Promotoraktivität bei dem Genotyp (TAA)12 gegenüber dem Genotyp (TAA)13 ausgegangen werden.
Zusammenfassend unterstützen die Ergebnisse dieser Arbeit die These, dass es sich bei dem Stathmin-Gen um ein Suszeptibilitätsgen für die Entstehung von Cluster C Persönlichkeitsstörungen handeln könnte.
Social contact is an integral part of daily life. Its health-enhancing effects include reduced negative affective experiences of fear and anxiety, a phenomenon called social buffering. This dissertation studied different forms of social contact and their anxiety-buffering effects with diverse methodologies.
The laboratory-based first study investigated minimal social contact in the context of pain relief learning. Results showed that the observed decreased autonomic and increased subjective fear responses following pain relief learning were independent of social influence. The minimalistic and controlled social setting may have prevented social buffering. Study 2 targeted social buffering in daily life using Ecological Momentary Assessment. We repeatedly assessed individuals’ state anxiety, related cardiovascular responses, and aspects of social interactions with smartphones and portable sensors on five days. Analyses of over 1,500 social contacts revealed gender-specific effects, e.g., heart rate-reducing effects of familiarity in women, but not men. Study 3 examined anxiety, loneliness, and related social factors in the absence of social contact due to social distancing. We constructed and validated a scale measuring state and trait loneliness and isolation, and analysed its link to mental health. Results include a social buffering-like relation of lower anxiety with more trait sociability and sense of belonging.
In sum, the studies showed no fear reduction by minimal social contact, but buffering effects relating to social and personal factors in more complex social situations. Anxiety responses during daily social contacts were lower with more familiar or opposite-gender interaction partners. During limited social contact, lower anxiety related to inter-individual differences in sociability, social belonging, and loneliness. By taking research from lab to life, this dissertation underlined the diverse nature of social contact and its relevance to mental health.
Due to the global aging society and the enormous global incidence and prevalence rates that will result in the coming years, Alzheimer's Dementia (AD) represents a growing challenge for the health care system. The pathogenesis, which is unclear in parts, the chronic progression of AD, which often lasts for years, as well as insufficient diagnostic and therapeutic options complicate an adequate psychotherapeutic and medical approach to the disease. To date, AD is also considered an incurable disease.
Therefore, it is essential to gain deeper insights into the early detection or even prevention of AD. Consideration of prodromal syndromes such as Mild Cognitive Impairment (MCI) can provide significant evidence about high-risk groups for AD progression and differentiate cognitively "normal" aging individuals from those with pathological cognitive decline. Thus, for example, functional Near-Infrared Spectroscopy (fNIRS) imaging helps identify early neurodegenerative processes. In contrast, potential risk factors and predictors of later-onset clinical symptoms of MCI and AD can most often be revealed and quantified via the use of neuropsychiatric test batteries.
The present thesis consists of four studies and aimed to assess and describe the pathological cognitive decline in a sample of elderly study participants (age: ≥ 70 years; N = 604 at baseline) of the longitudinal, observational, and prospective "Vogel Study" from Würzburg, Germany, who were primarily healthy at baseline, over two measurement time points approximately 3 years apart, to differentiate between healthy and diseased study participants and to define predictors of MCI/AD and longitudinal study dropout.
Studies 1 and 2 differentiated healthy study participants from MCI patients based on the baseline hemodynamic response of the parietal cortex recorded by fNIRS during the processing of a paradigm (here: Angle Discrimination Task [ADT]) for visual-spatial processing performance. Neuronal hypoactivity was found in the MCI patients, with both healthy study participants and MCI patients showing higher superior and right hemispheric activation. MCI patients had more difficulty resolving the paradigm. Thus, no evidence of possible compensatory mechanisms was uncovered in the MCI patients.
Study 3 first defined the four latent factors declarative memory, working memory, attention, and visual-spatial processing based on structural equation model (SEM) calculations of the sample using adequate measurement (in-)variant confirmatory factor models from the baseline assessment to the first of a total of two follow-up assessments after approximately 3 years. This allowed a dimensional assessment of pathological cognitive decline versus classificatory-categorical assignment (healthy/diseased) of the sample. In addition, the superiority of the latent factor approach over a composite approach was demonstrated. Next, using a mixed-model approach, predictive analyses were calculated for the prediction of latent factors at first follow-up by baseline risk factors. The sex of study participants proved to be the best predictor of cognitive change in all the cognitive domains, with females performing better than men in the memory domains. Specifically, for declarative memory, older age predicted lower performance regardless of sex. Additional predictive evidence emerged for low serum levels of Brain-Derived Neurotrophic Factor (BDNF) on lower attention performance and higher depression symptoms on lower visual-spatial processing performance.
Study 4 further reported baseline predictors of study dropout at first follow-up. Cognitive performance, as defined in Study 3 using the four latent cognitive factors, was a predictor of study dropout for cognitive decline in the domains of declarative memory, attention, and visual-spatial processing. Conspicuous dementia screening on the Mini-Mental Status Examination (MMSE) also predicted dropout.
Overall, both the use of fNIRS imaging to detect visual-spatial processing performance in the parietal cortex during applying ADT and the dimensional perspective of the neuropsychiatric test battery in the context of prediction and dropout analyses were found to be suitable for early detection research of MCI and AD. Finally, the results will be interpreted in the overall context and implications, limitations, and perspectives will be discussed.
Even though exposure-based cognitive behavioral therapy (CBT) constitutes a first-line treatment for anxiety disorders, a substantial proportion of patients does not respond in a clinically significant manner. The identification of pre-treatment patient characteristics that are associated with treatment outcome might aid in improving response rates. Therefore, the present doctoral thesis aimed at investigating moderators of treatment outcome in anxiety disorders: first, we investigated the neural correlates of comorbidity among primary panic disorder/agoraphobia (PD/AG) and secondary social anxiety disorder (SAD) moderating treatment outcome towards exposure-based CBT. Second, pre-treatment functional resting-state connectivity signatures of treatment response in specific phobia were studied. Within the first study, we compared PD/AG patients with or without secondary SAD regarding their clinical and neurofunctional outcome towards a manualized CBT treatment focusing on PD/AG symptoms. Prior to treatment, PD/AG+SAD compared to PD/AG-SAD patients exhibited a specific neural signature within the temporal lobe, which was attenuated to the level of PD/AG-SAD patients afterwards. CBT was equally effective in both groups. Thus, comorbidity among those two anxiety disorders did not alter treatment outcome substantially. This might be due to the high overlap of shared pathophysiological features within both disorders. In the second study, we assessed pre-treatment functional resting-state connectivity within a sample of spider phobic patients that were treated with massed in virtuo exposure. We found responders already prior to treatment to be characterized by stronger inhibitory frontolimbic connectivity as well as heightened connectivity between the amygdala and regions related to the ventral visual stream. Furthermore, patients demonstrating high within-session extinction exhibited pronounced intrinsic prefrontal connectivity. Our results point to responders exhibiting a brain prepared for the mechanism of action of exposure. Taken together, results highlight the major impact of pre-treatment characteristics on treatment outcome. Both, PD/AG+SAD patients as well as responders within the SpiderVR study exhibited heightened activation or connectivity within the ventral visual pathway and the amygdala. Pronounced visual processing together with enhanced executive control and emotion regulation seem to constitute a fruitful soil for successful exposure. The results provide starting points for personalized treatment approaches in order to improve treatment success in the anxiety disorders. Future studies are needed to investigate the benefit of neuroscientifically informed CBT augmentation strategies such as repetitive transcranial magnetic stimulation.