Genome-wide association analyses identify 95 risk loci and provide insights into the neurobiology of post-traumatic stress disorder

Post-traumatic stress disorder (PTSD) genetics are characterized by lower discoverability than most other psychiatric disorders. The contribution to biological understanding from previous genetic studies has thus been limited. We performed a multi-ancestry meta-analysis of genome-wide association studies across 1,222,882 individuals of European ancestry (137,136 cases) and 58,051 admixed individuals with African and Native American ancestry (13,624 cases). We identified 95 genome-wide significant loci (80 new). Convergent multi-omic approaches identified 43 potential causal genes, broadly classified as neurotransmitter and ion channel synaptic modulators (for example, GRIA1, GRM8 and CACNA1E), developmental, axon guidance and transcription factors (for example, FOXP2, EFNA5 and DCC), synaptic structure and function genes (for example, PCLO, NCAM1 and PDE4B) and endocrine or immune regulators (for example, ESR1, TRAF3 and TANK). Additional top genes influence stress, immune, fear and threat-related processes, previously hypothesized to underlie PTSD neurobiology. These findings strengthen our understanding of neurobiological systems relevant to PTSD pathophysiology, while also opening new areas for investigation.

Alone on the frontline: The first report of PTSD prevalence and risk in de-occupied Ukrainian villages

IMPORTANCE

The ongoing Russian invasion of Ukraine marks a critical juncture in a series of events posing severe threat to the health of Ukrainian citizens. While recent reports reveal higher rates of PTSD in Ukrainian refugees following Russia's invasion - data for Ukrainians remaining at the warfront is inherently difficult to access. A primarily elderly demographic, Ukrainians in previously Russian-occupied areas near the front (UPROANF) are at particular risk.

DESIGN

Data was sourced from screening questionnaires administered between March 2022 and July 2023 by mobile health clinics providing services to UPROANF.

SETTING

Previously occupied villages in Eastern and Southern Ukraine.

PARTICIPANTS

UPROANF attending clinics completed voluntary self-report surveys reporting demographics, prior health diagnoses, and PTSD symptom severity (n = 450; Meanage = 53.66; 72.0% female).

EXPOSURE

Participants were exposed to Russian occupation of Ukrainian villages.

MAIN OUTCOME AND MEASURES

The PTSD Checklist for the DSM-V (PCL-5) with recommended diagnostic threshold (i.e. 31) was utilized to assess PTSD prevalence and symptom severity. ANCOVA was used to examine hypothesized positive associations between (1) HTN and (2) loneliness and PTSD symptoms (cumulative and by symptom cluster).

RESULTS

Between 47.8% and 51.33% screened positive for PTSD. Though cumulative PTSD symptoms did not differ based on HTN diagnostic status, those with HTN reported significantly higher PTSD re-experiencing symptoms (b = 1.25, SE = 0.60, p = .046). Loneliness was significantly associated with more severe cumulative PTSD symptoms (b = 1.29, SE = 0.31, p < .001), re-experiencing (b = 0.47, SE = 0.12, p < .001), avoidance (b = .18, SE = 0.08, p = .038), and hypervigilance (b = 0.29, SE = 0.13, p = .036).

CONCLUSIONS AND RELEVANCE

PTSD prevalence was higher than other war-exposed populations. Findings highlight the urgent mental health burden among UPROANF, emphasizing the need for integrated care models addressing both trauma and physical health. Given the significance of loneliness as a risk factor, findings suggest the potential for group-based, mind-body interventions to holistically address the physical, mental, and social needs of this highly traumatized, underserved population.

In Context: AI Will Write Your Paper: The Very Different Future of Research and Scientific Writing in the Age of Artificial Intelligence

Recently, I was at a Microsoft Technology Center to discuss the augmented reality (AR) technology developed in my lab for treatment of post-traumatic stress disorder (PTSD). We also explored the possibility of using artificial intelligence (AI) to automate interactions with digital AR characters. We were also given a tour of the Microsoft 365 Copilot AI technology. This experience, along with my upcoming experiences with the rapidly evolving and publicly available AI technology, triggered a series of questions and reflections about the use of AI in scientific work and writing.

What happened matters: Trauma type and cumulative trauma exposure in refugee youth psychopathology

OBJECTIVE

Trauma exposure-a contributor to psychological risk for refugee youth-is typically assessed using cumulative indices; however, recent findings indicate that trauma type may better predict psychological outcomes. This study investigated the utility of two methods of classifying trauma exposure-cumulative trauma and exposure to specific types of trauma (i.e., trauma subtypes)-in predicting the severity of symptoms related to posttraumatic stress disorder (PTSD) and anxiety for refugee youth.

METHOD

96 Syrian and Iraqi youth resettled as refugees in the United States self-reported trauma exposure and psychological symptoms. Multiple regression was used to assess the variance in symptom severity explained by specific trauma subtypes (i.e., victimization, death threat, and accidental/injury) as compared to cumulative trauma scores.

RESULTS

Multiple regression models predicting PTSD revealed cumulative trauma (b = 0.07; p = .004) and death threat trauma (b = 0.16; p = .001) as significant predictors of PTSD symptom severity; notably, death threat trauma was the only subtype associated with PTSD and explained more variance than cumulative trauma scores (10.3% and 8.4%, respectively). Cumulative trauma, but no specific trauma subtype, was associated with anxiety (b = .03; p = .043); however, this relation did not survive correction for multiple comparisons.

CONCLUSION

Focused trauma assessment-particularly consideration of death threat trauma and cumulative trauma exposures-may be useful in evaluating the risk of PTSD symptoms in refugee youth, whereas symptoms related to anxiety may be driven by other factors. These findings can be leveraged toward focused identification of youth at highest risk for PTSD symptoms, to improve prevention and early intervention efforts. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

The longitudinal impact of war exposure on psychopathology in Syrian and Iraqi refugee youth

BACKGROUND

War and natural disasters lead to forced migration - and increased risk of adverse psychological outcomes - in approximately 1% of the global population. Though recent years have brought a greater understanding of the consequences of war exposure on mental health outcomes for refugee children, little is known about the longitudinal and developmental impact of these experiences on youth.

AIMS

The aim of this study was to assess the effect of direct exposure to war and/or combat on trajectories of symptoms related to anxiety and post-traumatic stress disorder (PTSD) in Syrian and Iraqi refugee youth following resettlement. Prevalence of possible anxiety disorders and PTSD was also assessed.

METHOD

Participants included accompanied refugee youth resettled in the state of Michigan in the U.S. (n = 74). Youth filled out self-report measures of trauma exposure, anxiety symptoms, and PTSD symptoms upon arrival and 2 years later. Linear mixed-effects modeling was used to assess the effect of war exposure over time.

RESULTS

Upon arrival, 38% screened positive for an anxiety disorder and 4.1% met diagnostic thresholds for PTSD. While war exposure did not predict changes to PTSD symptom trajectories (p = .481), anxiety symptoms increased over time among children reporting war exposure (B = 10.13, SE = 4.22, t = 2.40, p = .019).

CONCLUSIONS

Our findings suggest that without appropriate interventions, anxiety- and trauma-related symptoms often do not decrease. Further, exposure to war trauma may lead to progressive worsening of symptoms. These findings suggest that assessing for type of trauma exposure, rather than focusing solely on migration status, may inform focused attention and interventions among trauma-exposed children resettling as refugees.

Practical approaches to conducting biopsychosocial research with refugee and internally displaced communities

Refugees and internally displaced people comprise one percent of the world population. Forced migration involves a multitude of ongoing stressful and traumatic experiences, often resulting in lasting psychological symptoms for people resettling as refugees. Despite these risks, the underrepresentation of refugee populations in research-particularly in biological sciences-has impeded the allocation of effective resources and the development of novel interventions for these groups. This paper identifies and addresses key methodological challenges to successfully and appropriately conducting research with refugee and internally displaced communities, many of which have served as barriers to improving research representation for these populations. Methodological challenges discussed include language and literacy barriers; political fears; differing cultural dynamics between participants and researchers; and others. We provide practical recommendations for overcoming each challenge, often sourced from our experience conducting multi-year studies and interventions in refugee mental health. Several key strategies include the recruitment of researchers and research assistants from similar cultural and linguistic backgrounds as participants; providing detailed, ongoing communication about informed consent; avoiding assumptions regarding participants' understanding of concepts that may vary based on culture or experience (e.g., "voluntary" research; confidentiality); and adopting flexible data collection procedures compatible with participants' needs and restrictions. Finally, we discuss the role of the researcher in regard to cultural competencies and partnering with the refugee community. Given the increasing global population of refugees, the strategies discussed in this paper are suggested in order to encourage future research in this underrepresented population and empower investigators to logistically carry out studies with refugees.

Discovery of 95 PTSD loci provides insight into genetic architecture and neurobiology of trauma and stress-related disorders

Posttraumatic stress disorder (PTSD) genetics are characterized by lower discoverability than most other psychiatric disorders. The contribution to biological understanding from previous genetic studies has thus been limited. We performed a multi-ancestry meta-analysis of genome-wide association studies across 1,222,882 individuals of European ancestry (137,136 cases) and 58,051 admixed individuals with African and Native American ancestry (13,624 cases). We identified 95 genome-wide significant loci (80 novel). Convergent multi-omic approaches identified 43 potential causal genes, broadly classified as neurotransmitter and ion channel synaptic modulators (e.g., GRIA1, GRM8, CACNA1E ), developmental, axon guidance, and transcription factors (e.g., FOXP2, EFNA5, DCC ), synaptic structure and function genes (e.g., PCLO, NCAM1, PDE4B ), and endocrine or immune regulators (e.g., ESR1, TRAF3, TANK ). Additional top genes influence stress, immune, fear, and threat-related processes, previously hypothesized to underlie PTSD neurobiology. These findings strengthen our understanding of neurobiological systems relevant to PTSD pathophysiology, while also opening new areas for investigation.

Perceived adversity and psychological distress in refugee married couples resettling in the United States

BACKGROUND

Syrian and Iraqi refugees are a growing segment of the U.S. population, and although exposure to war and violence has been linked to psychological distress in individual refugees, few studies have examined the distress in married couples.

METHODS

Using a cross-sectional design, a convenience sample of 101 Syrian and Iraqi refugee couples was recruited from a community agency. The purpose of this study was to (1) examine the relationships between perceived adversity and psychological distress (PTSD, anxiety, and depressive symptoms) among individual study participants; and (2) determine whether these relationships were correlated to their spouses' perceived adversity and psychological distress.

RESULTS

The bivariate correlation analysis showed strong positive correlations between PTSD and depression/anxiety for wives (r = .79; p < .001) and for husbands (r = .74; p < .001). There were also low- to mid-range positive cross-associations between husbands' and wives' PTSD (r = .34; p = .001) and depression/anxiety (r = .43; p < .001). Finally, we found a significant positive association between husbands' and wives' perception of adversity (r = .44; p < .001). Interestingly, the husbands' perception of adversity was positively associated with their PTSD (r = .30; p = .02) and depression/ anxiety scores (r = .26; p = .04) as well as with their wives' depression/ anxiety scores (r = .23; p = .08). In contrast, the wives' perception of adversity was not associated with either their own or their spouses' psychological distress.

CONCLUSION

Our findings suggest that war, trauma, and stress of migration impact the couple as a unit, possibly due to shared experiences, and the impact of one partner's stress on the other. Addressing these perceptions and personal interpretations of the adverse experiences via cognitive therapy approaches could help reduce not only stress in the individual but also that of their partner.

The fear that remains: Associations between trauma, related psychopathology, and fear‐potentiated startle in youth resettled as refugees

Fear-potentiated startle (FPS) can be used to measure fear and safety learning-behaviors affected by trauma that may map onto posttraumatic stress disorder (PTSD). Therefore, FPS could be a candidate biomarker of trauma-related psychopathology and a potential identifier of trauma-exposed youth in need of focused treatment. We enrolled n = 71 (35 females, M_age  = 12.7 years) Syrian youth exposed to civilian war trauma. Eyeblink electromyogram (EMG) data from a differential conditioning FPS paradigm were obtained 2.5 years after resettlement. Youth provided self-report of trauma exposure (Harvard Trauma Questionnaire) and PTSD symptoms (UCLA PTSD Reaction Index). While FPS during conditioning was not associated with symptoms, associations with psychopathology emerged in fear extinction. Probable PTSD was associated with FPS in the last block of extinction, such that FPS to threat cue was significantly greater in the PTSD+ group compared to the PTSD- group at the end of extinction (F = 6.25, p = .015). As with adults, we observed a deficit in extinction learning but not fear conditioning in youth with PTSD. These results support the use of trauma-informed cognitive behavioral therapy based on the learning principles of extinction in youth with PTSD.

The Predictive Utility of Trauma Subtypes in the Assessment of Mental Health Outcomes for Persons Resettled as Refugees

Pre-migration trauma, a psychological risk factor for refugees, is often measured using cumulative indices. However, recent research suggests that trauma subtypes, rather than cumulative trauma, may better predict psychological outcomes. This study investigated the predictive utility of trauma subtypes in the assessment of refugee mental health. Multiple regression was used to determine whether cumulative trauma or trauma subtypes explained more variance in depression, anxiety, and post-traumatic stress disorder (PTSD) symptom scores in 70 Syrian and Iraqi refugees. Subtype models performed better than cumulative trauma models for PTSD (cumulative R2 = 0.138; subtype R2 = 0.32), anxiety (cumulative R2 = 0.061; subtype R2 = 0.246), and depression (cumulative R2 = 0.041; subtype R2 = 0.184). Victimization was the only subtype significantly associated with PTSD (p < 0.001; r2 = 0.210), anxiety (p < 0.001; r2 = 0.162), and depression (p = 0.002; r2 = 0.140). Cumulative trauma was predictive of PTSD symptoms only (p = 0.003; r2 = 0.125). Trauma subtypes were more informative than cumulative trauma, indicating their utility for improving predictive efforts in research and clinical contexts.

Relationship between Posttraumatic Stress Disorder and Sleep Disturbances in Syrian Refugees in the United States

Background  Posttraumatic stress disorder (PTSD) is associated with disturbed sleep. However, the impact of sleep disturbances and PTSD symptomology in refugee populations is not well known. This study examined how PTSD-related sleep symptoms and overall sleep quality were impacted by previous and current traumatic and stressful experiences. Methods  Adult Syrian refugees living in Southeast Michigan were assessed via scheduled in-home interviews. Overall sleep quality was measured using the Pittsburgh Sleep Quality Index. PTSD-related sleep disturbances were measured using the Pittsburgh Sleep Quality Index Addendum. The presence of PTSD symptomatology was assessed via self-report using the Posttraumatic Stress Disorder Checklist. The Life Events Checklist for the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition-5 screened for prior traumatic events experienced and the Postmigration Living Difficulties Questionnaire was assessed for postmigration stressors. Correlational analysis was conducted between overall sleep quality, PTSD symptom severity, and previous trauma experienced. A stepwise linear regression analysis was conducted to examine the role of overall sleep quality, PTSD-specific sleep disturbances, current living difficulties, and the number of preimmigration traumatic events directly experienced or witnessed due to the presence of overall PTSD symptomology. Results  A total of 53 adults completed the study. PTSD-disturbed sleep was found to be positively associated with overall poor sleep quality ( r  = 0.42, p  < 0.01), PTSD symptomology ( r  = 0.65, p  < 0.01), and current living difficulties ( r  = 0.37, p  < 0.05). The PTSD-related sleep disturbances (B = 0.66, p  < 0.01) and postmigration living difficulties (B = 0.44, p  < 0.01) were found to be the strongest predictors of PTSD symptoms. Conclusion  Disturbed sleep is strongly associated with current stressful experiences and PTSD symptomology among Syrian refugees.

Photovoice Techniques and Art Therapy Approaches with Refugee and Immigrant Adolescents

This paper describes a program informed by art therapy and Photovoice approaches and techniques aimed at helping new immigrant and refugee teens to navigate personal and cultural identities by reflecting on their experiences as new residents in the US. Photovoice is a photography and social action method that encourages participants to photograph aspects of their daily lives, reflect on their meaning and significance and galvanize necessary changes. The program began in February 2020 at the Arab-American National Museum (AANM), but was adapted for an online format and re-framed towards a reflection on the COVID-19 pandemic. Broad questions teens explored included: What is good? What is challenging? What is sustaining during challenging times? What needs to change? and What about your culture and background are you proud of and wish to share with other US residents? Highlights of the sessions demonstrate how art therapy interventions paralleled photography-assigned themes of self, home, and community and encouraged group interaction and mutual support. A virtual museum exhibition culminated the program and reached community leaders. Self-reports from select participants highlight changes in posttraumatic stress, anxiety, and somatic symptoms over the course of programming.

Perceived Stress among Iranians during COVID-19 Pandemic; Stressors and Coping Mechanisms: A Mixed-methods Approach

OBJECTIVE

New coronavirus (COVID-19) pandemic socioeconomically affected the world. In this study, we measured the perceived stress in response to the COVID-19 pandemic among Iranians to determine the groups at both extremes of the spectrum followed by identifying the stressors and coping mechanisms.

METHODS

This study was a mixed-methods study. We distributed a web-based 10-item perceived stress scale (PSS-10), to measure perceived stress score (PSS), through social networks from March 12 to 23, 2020. Then, we interviewed 42 students, 31 homemakers, 27 healthcare providers, and 21 male participants to identify the sources of stress and coping mechanisms.

RESULTS

Finally, 13,454 participants completed the questionnaires. The median and interquartile range (IQR) of the participants' PSS was 21 (15-25). Students, homemakers, and healthcare workers (HCWs) showed a higher median (IQR) of PSS compared to other groups (23 [18 to 27], 22 [16 to 26], and 19 [14 to 24], respectively). Male participants showed a lower median (IQR) PSS (17 [12 to 23]). Content analysis of 121 participants' answers showed that the most common stressors were school-related issues mentioned by students, family-related issues mentioned by homemakers, and COVID-19-related issues mentioned by healthcare providers. Male participants' coping mechanisms were mostly related to the perception of their abilities to cope with the current crisis.

CONCLUSION

Our participants clinically showed a moderate level of PSS. The main stressors among students, homemakers, and HCWs were related to their principal role in this period, and male participants' coping mechanisms were inspired by the self-image retrieved from the social perspectives.

Biological Psychiatry in Displaced Populations: What We Know, and What We Need to Begin to Learn

Conflict and climate change continue to displace millions of people, who experience unique trauma and stressors as they resettle in host countries. Both children and adults who are forcibly displaced, or choose to migrate, experience posttraumatic stress disorder, anxiety, depression, and other mental health conditions at higher rates than the general population. This may be attributed to severe, cumulative stress and trauma (largely interpersonal traumas); discrimination and harassment in host countries; and structural barriers to accessing and addressing mental health concerns, including clinician availability, language barriers, cultural differences, geographic accessibility, health care access, and stigma. Despite high exposure to and clinical impact of such experiences, and despite representing 1% of the world population, forcibly displaced people are underrepresented in neuroscientific research. The availability of such literature and research findings is significant in understanding the unique genetic and cultural aspects of trauma- and stress-related mental health, advocacy, reducing stigma, informing prevention, and treatment. The present work aimed to explore how the field of neuroscience can address mental health equity for individuals who have been uprooted in relation to land, with a focus on refugee populations. We offer practical suggestions on how to improve research in this area and narrow the gap in knowledge.

Alcohol use and alcohol use disorder differ in their genetic relationships with PTSD: A genomic structural equation modelling approach

PURPOSE

Posttraumatic Stress Disorder (PTSD) is associated with increased alcohol use and alcohol use disorder (AUD), which are all moderately heritable. Studies suggest the genetic association between PTSD and alcohol use differs from that of PTSD and AUD, but further analysis is needed.

BASIC PROCEDURES

We used genomic Structural Equation Modeling (genomicSEM) to analyze summary statistics from large-scale genome-wide association studies (GWAS) of European Ancestry participants to investigate the genetic relationships between PTSD (both diagnosis and re-experiencing symptom severity) and a range of alcohol use and AUD phenotypes.

MAIN FINDINGS

When we differentiated genetic factors for alcohol use and AUD we observed improved model fit relative to models with all alcohol-related indicators loading onto a single factor. The genetic correlations (rG) of PTSD were quite discrepant for the alcohol use and AUD factors. This was true when modeled as a three-correlated-factor model (PTSD-AUD rG:.36, p < .001; PTSD-alcohol use rG: -0.17, p < .001) and as a Bifactor model, in which the common and unique portions of alcohol phenotypes were pulled out into an AUD-specific factor (rG with PTSD:.40, p < .001), AU-specific factor (rG with PTSD: -0.57, p < .001), and a common alcohol factor (rG with PTSD:.16, NS).

PRINCIPAL CONCLUSIONS

These results indicate the genetic architecture of alcohol use and AUD are differentially associated with PTSD. When the portions of variance unique to alcohol use and AUD are extracted, their genetic associations with PTSD vary substantially, suggesting different genetic architectures of alcohol phenotypes in people with PTSD.

Acculturative Stress and Postpartum Depressive Symptoms among Immigrant Arab American Couples

PURPOSE

The purpose of this study was to examine the relationships between acculturative stress, perceived stress, social support, and postpartum depression (PPD) symptoms among immigrant Arab American couples.

METHODS

Using a cross-sectional design, 30 Arab American immigrant couples were enrolled. During home visits, couples completed the demographic information, the Multi-Dimensional Acculturative Stress Inventory, Perceived Stress, the Multidimensional Scale of Perceived Social Support among Arab Women, and the Edinburgh Postnatal Depression Scale. Data were analyzed using bivariate linear regression and Pearson correlation.

RESULTS

In bivariate regressions, paternal and maternal acculturative stress was moderately associated with maternal PPD symptoms (r = .39, and .46, respectively; p < .05). Maternal perceived stress (r = .70, P < .01) was strongly associated with PPD and maternal perceived social support was moderately associated with PPD (r = -.42, p < .05). Maternal and paternal acculturative stress was strongly correlated (r = .61, p < .001).

CONCLUSION

Couple's acculturative stress and mother's perceived stress were positively associated with mother's PPD symptoms. Our findings suggest the need to develop a culturally appropriate procedure to assess couple's stress that may affect immigrant women at high risk for PPD.

Perceived health, adversity, and posttraumatic stress disorder in Syrian and Iraqi refugees

BACKGROUND

Exposure to armed conflict and fleeing country of origin for refugees has been associated with poorer psychological health.

METHODS

Within the first month following their arrival in the United States, 152 Syrian and Iraqi refugees were screened in a primary care setting for posttraumatic stress disorder (PTSD), anxiety, and depression and rated their perceived health, and perceived level of adversity of violence, armed conflict/flight. The moderating effects of psychiatric symptoms on the relation between perceived adversity and perceived health were assessed.

RESULTS

Three models based on diagnosis (PTSD, anxiety, and depression) were tested. While significant effects were found on perceived adversity negatively influencing perceived health across diagnoses, slightly different patterns emerged based on diagnosis.

DISCUSSION

Findings suggest that refugees' perception regarding adversity of violence, armed conflict, and flight may contribute to perceived health, with a moderating role of clinically significant symptoms of PTSD, anxiety, and depression.

How Should Clinicians Determine a Traumatized Patient's Readiness to Return to Work?

A clinician's standard primary role is to treat and monitor their patients' health and to be their ally. Clinicians with obligations to patients and to organizations, however, must also assess patients for nontherapeutic purposes (eg, readiness to resume work). These 2 obligations can conflict, and, when they do, clinicians must balance their duties to patients and to society. We propose criteria clinicians should consider when determining a patient's readiness to return to work and offer recommendations for interpreting factors that influence this decision.

Addressing war trauma in Ukrainian refugees before it is too late

Russian invasion of Ukraine has led to one of the largest refugee crises in recent history. Many internally displaced Ukrainians and refugees will need care for PTSD, anxiety, and depression. Here I will suggest practical steps to reduce long-term impact of trauma and stress on refugees' mental and physical health, and functioning. These include mental health first aid in acute phase of arrival, education of mental health and navigating healthcare system in the host countries. As well, training of manualized trauma-focused therapy and intervention methods in the host countries, focused education for physicians on psychopharmacological interventions for common mental health issues among refugees (PTSD, depression, anxiety), and utilization of videoconferencing for treatment, and consultation and supervision for providers.

HIGHLIGHTS

Many internally displaced Ukrainians and refugees will need care for PTSD, anxiety, and depression to prevent long-term disability and health consequences.There are challenges in receiving the needed care including stigma, lack of awareness by patients and providers, lack of resources, and lack of skills in trauma-focused treatments.In this article, suggestions are made on how to overcome these obstacles, that include mental health first aid upon arrival, education for refugees and those serving them, training providers at different layers, and remote treatment and counselling/supervision services.

Skin conductance response to trauma interview as a candidate biomarker of trauma and related psychopathology in youth resettled as refugees

Background: Posttraumatic stress symptoms (PTSS) include a constellation of physical and emotional profiles that youth exposed to trauma may experience. An estimated 20% of youth are exposed to trauma, and in refugee populations, up to 54% experience posttraumatic stress. Given the physical and mental health consequences associated with trauma exposure and subsequent psychopathology, identifying biomarkers of symptom severity is a top research priority. Objective: Previous research in adults found that skin conductance responses to trauma interview predicted current and future PTSS. We extended this method to refugee youth exposed to civilian war trauma and forced migration, to examine associations between PTSS and skin conductance in this uniquely vulnerable child and adolescent population. Methods: 86 refugee youth ages 7-17 years completed a trauma interview and assessment of self-reported PTSS. The mobile eSense app on a iPad was used to obtain continuous recordings of skin conductance level (SCL) during a trauma interview (trauma SCL). Skin conductance response (SCR) was calculated by subtracting the baseline SCL from the maximum amplitude of the trauma SCL. Results: SCL during trauma was significantly greater than baseline SCL, Trauma exposure was significantly associated with SCR to trauma interview, R²= .084, p = .042. SCR to trauma interview was positively correlated with reexperiencing (R² = .127, p = .028), and hyperarousal symptoms (R ²= .123, p = .048). Conclusions: The present study provides evidence for feasibility of SCR to trauma interview as a candidate biomarker of PTSS in youth. This is the first study to look at SCR to trauma interview in youth resettled as refugees and is part of the limited but growing body of research to look at biomarkers in refugee cohorts more broadly. As the number of forcibly displaced persons surges, early detection and prevention of trauma-related psychology is becoming more important than ever.

HIGHLIGHTS

Using the mobile eSense app, we demonstrate that skin conductance is measurable in a variety of research settings and that skin conductance response may be a biological indicator of trauma and related psychopathology - namely re-experiencing symptoms - in youth resettled as refugees.

Real-life contextualization of exposure therapy using augmented reality: A pilot clinical trial of a novel treatment method

BACKGROUND

Phobias, including arachnophobia, are common and can be treated with exposure therapy, a method that is limited by a lack of feared objects/situations in clinical settings.

METHODS

In a pilot parallel randomized controlled trial (RCT) to test the feasibility and efficacy of augmented reality exposure therapy (ARET), 25 men and women ages 18 to 45 with arachnophobia were designated (ABAB block allocation) to ARET for arachnophobia (n = 13) or waitlist control (n = 12). Data were collected at baseline, 1-week, and 1-month follow-up, and single-session ARET occurred immediately following baseline collection for the intervention group.

RESULTS

All ARET participants were able to touch a live tarantula or the tank containing it after single-session exposure; the control group remained >1 meter away from the tank. Effects persisted or improved at 1-month followup. The Fear of Spiders Questionnaire (FSQ) and Behavioral Approach Test (BAT) showed large, significant beneficial effects of ARET compared with a waitlist control group (BAT: P < .001, partial eta squared = .542; FSQ: P < .001, partial eta squared = .720).

CONCLUSIONS

We found ARET can feasibly be delivered using a wearable device running novel software with rapid responses and sustained effects. Replication and expansion of this pilot RCT will further support use of ARET for this and other specific phobias.

The psychological impacts of COVID-19 related stressors on Syrian refugees in Turkey: The role of resource loss, discrimination, and social support

COVID-19 does not leave behind refugees. They are disproportionately affected during the current pandemic. The present study aimed to investigate the psychological impacts of COVID-19 related stressors -resource loss and perceived discrimination during the COVID-19 pandemic- on Syrian refugees in Turkey. Further, the buffering role of perceived social support against the detrimental impacts of such stressors was examined. An online cross-sectional study was conducted between September-October 2020. A sample of 345 Syrian refugees in Turkey completed the questions about demographic characteristics, resource loss and perceived discrimination during the pandemic, perceived social support, and depressive and anxiety symptoms. A high level of depressive and anxiety symptoms was reported in our sample. Resource loss and perceived discrimination during the pandemic significantly and positively predicted depressive and anxiety symptoms. Perceived social support acted as a buffer against the detrimental effect of resource loss on mental health. For those with higher perceived social support, resource loss during the pandemic did not significantly predict depressive and anxiety symptoms. The results indicate the detrimental role of COVID-19 related stressors on refugee mental health. Social support is an important protective factor for mental health amidst the pandemic. Our findings highlight the importance of considering the precarious conditions of refugees in all COVID-19 responses and communications.

The effect of stress and acculturation on the self-rated health of Arab Americans

BACKGROUND:

The self-rated health of Arab Americans has been found to be worse than non-Hispanic whites. Psychosocial factors such as stress and acculturation may explain this disparity. As a result, we designed this survey to better understand the effects of stress and acculturation on the self-rated health of the Arab-American community.

MATERIALS AND METHODS:

Using a convenience sample, we surveyed 142 self-identified Arab Americans regarding demographics, stress, acculturation, and self-rated health. Stress was measured using instruments assessing perceived stress, everyday discrimination, and acculturative stress. Acculturation was measured using a modified Vancouver Index of Acculturation. To measure self-rated health, participants were asked to rate their current health on a scale of 1 (very poor) to 5 (very good).

RESULTS:

A logistic regression model adjusted for age, sex, body mass index, and education did not find that stress significantly affected the odds of having poor self-rated health in Arab Americans. Heritage identity was associated with lower odds of having poor self-rated health (odds ratio = 0.37, 95% confidence interval [CI] 0.15, 0.94, P < 0.05). No association was found between acculturation and poor self-rated health.

CONCLUSION:

Greater levels of stress were not significantly associated with greater odds of poor self-rated health in Arab Americans. We also found that greater heritage identity significantly decreased the odds of poor self-rated health in Arab Americans. The effects of everyday discrimination, perceived stress, and acculturation on self-rated health in Arab Americans remain unclear and need to be examined further.

The Impact of the Coronavirus Disease 2019 (COVID-19) Pandemic on Healthcare Workers with Pre-Existing Psychiatric Conditions

Both healthcare workers (HCWs) and psychiatric patients during the COVID-19 pandemic appear to have elevated prevalence of psychiatric symptoms, but little is known about HCWs with psychiatric diagnoses. To examine their response to the pandemic, we analyzed their perspective, and association with psychiatric symptoms and stress among HCW with psychiatric diagnosis. Using an online survey of HCW, we analyzed demographics, work information, health factors, open-ended question, sources of stress and standardized mental health scales (Perceived Stress Scale (PSS), Generalized Anxiety Disorder-7 (GAD-7), Patient Health Questionnaire-8 (PHQ-8), and Posttraumatic Stress Disorder Checklist (PCL)). Sixteen out of 129 HCWs reported a pre-existing psychiatric diagnosis (median age 32 years, 8 were females, 8 work in the emergency department). Their perception of the impact severity on symptoms was significantly correlated with all the mental health scales and with stress from avoiding physical contact. In multivariate analysis, PSS score and PCL score were associated with self-rated impact of the COVID-19 pandemic on symptoms (standardized beta = .51 for PCL and standardized beta = .55 for PSS). GAD-7 score was significantly related to both impact (standardized beta = .44) and stress from avoiding physical contact (standardized beta = .53). HCWs with psychiatric diagnoses reported a range of perception of the impact of the pandemic on their symptoms with increased severity associated with worse psychiatric outcomes and more stress from avoiding physical contact with others. There is a growing importance to protect HCWs mental health, including those with pre-existing psychiatric diagnosis, and proactively counter psychosocial consequences of healthcare crises.

Rapid assessment of mental health of Detroit-area health care workers during the COVID-19 pandemic

BACKGROUND

The COVID-19 pandemic may adversely impact the mental health of health care workers (HCWs). To address this issue, it is essential to determine levels of anxiety, depression, and traumatic stress, and sources of stress, and to identify subgroups of HCWs at a higher risk of adverse mental health outcomes during the COVID-19 pandemic.

METHODS

We conducted a cross-sectional study of symptoms of mental illness in HCWs in the area surrounding Detroit, Michigan. The online survey included questions about demographics, health and clinical factors, and sources of stress. Several tools were used to assess psychiatric symptoms among HCWs, including the Perceived Stress Scale, the Patient Health Questionnaire depression scale, the Generalized Anxiety Disorder 7-item assessment, and the Posttraumatic Stress Disorder Checklist for DSM-5. The adequacy of personal protective equipment, patient resources, and training for highly contagious diseases were rated.

RESULTS

The sample (N = 129) was predominantly female (51.2%) and White (65.9%), with 30.2% screening positive for clinical follow-up to assess anxiety, 20.9% for moderate to severe depression, and 16.3% for elevated traumatic stress. Differences were found by self-reported psychiatric diagnosis and chronic conditions, and role on treatment teams.

CONCLUSIONS

Frontline HCWs demonstrate high levels of stress and trauma symptoms. Timely screening and accommodations may be needed during health care crises, such as the COVID-19 pandemic.

Trauma-Related Psychopathology in Iraqi Refugee Youth Resettled in the United States, and Comparison With an Ethnically Similar Refugee Sample: A Cross-Sectional Study

Background

Conflict in Iraq has displaced millions of refugee youth. Warzone exposure and forced migration have unique acute and chronic impacts on youth, yet effects of exposure may not be universal across diverse refugee groups. Understanding how youth from various refugee groups are differentially affected by stress and trauma is critical to allocate resources and implement screening measures with the goal of providing early intervention.

Method

To identify the effects of warzone exposure and forced migration, a convenience sample of 48 Iraqi refugee youth ages 6-17 was assessed within the first month of arrival to the United States. Youth provided self-reported severity of posttraumatic stress and anxiety symptoms; symptom severity was then compared with an existing sample of 135 Syrian refugee youth to explore whether refugee youth of different nationalities experience the same effects of warzone exposure and forced migration. These data are the baseline for a longitudinal developmental study of refugee health, which also includes parental data.

Results

Severity of separation anxiety and negative alterations in cognition and mood were the greatest symptomatic concerns in Iraqi refugee youth. Thirty-eight percent of responding Iraqi youth showed possible indication of an anxiety disorder. Severity of posttraumatic stress symptoms was lower in Iraqi youth compared to Syrian youth. For both Iraqi and Syrian refugee youth, separation anxiety was the most significant concern, with more than 80% of both samples showing a possible indication of clinically significant separation anxiety.

Conclusion

The present observational study indicated that Iraqi refugee youth experience a range of anxiety and posttraumatic stress symptoms following warzone exposure and forced migration; posttraumatic stress symptoms were less severe in Iraqi versus Syrian youth. Comparing refugee youth of different nationalities is of particular importance, as our results demonstrate that findings from one refugee population cannot easily be generalized to another. Clinical and research efforts should prioritize interventions to address separation anxiety in refugee youth, which was of concern in both samples.

The Neurocircuitry Underlying Additive Effects of Safety Instruction on Extinction Learning

Extinction learning is the dominant laboratory model for exposure therapy, a treatment involving both experience of safety near the feared object, and safety instructions relayed by a therapist. While the experiential aspect of extinction learning is well researched, less is known about instructed extinction learning and its neurocircuitry. Here, in 14 healthy participants we examined the neural correlates of, and the network interactions evoked by instructed extinction learning. Following fear conditioning to two CS+ stimuli, participants were instructed about the absence of the aversive unconditioned stimulus (US) for one of the CS+s (instructed CS; CS+I) but not the second CS+ (uninstructed CS+; CS+U). Early during extinction learning, greater activation was observed for the CS+I > CS+U contrast in regions including the vmPFC, dmPFC, vlPFC, and right parahippocampus. Subsequently, psychophysiological interaction (PPI) was applied to investigate functional connectivity of a seed in the vmPFC. This analyses revealed significant modulation of the dmPFC, parahippocampus, amygdala, and insula. Our findings suggest that the addition of cognitive instruction yields greater activation of emotion regulation and reappraisal networks during extinction learning. This work is a step in advancing laboratory paradigms that more accurately model exposure therapy and identifies regions which may be potential targets for neuromodulation to enhance psychotherapy effects.

Racial Difference in the Relationship Between Health and Happiness in the United States

Background

Although health is a prerequisite for happiness, the salience of health for maintaining happiness may be diminished for Blacks when compared to Whites, a phenomenon which can be explained by the Black-White mental health paradox and minorities’ diminished returns.

Aim

To understand if Black and White adult Americans differ in the effects of self-rated health (SRH) on happiness.

Methods

This cross-sectional study used data from the General Social Survey (GSS; 1972–2018), a nationally representative survey in the US. Our analytical sample included 42,201 Black and White adults. The independent variable was SRH. Happiness was the dependent variable. Sociodemographic factors were covariates. Race was the moderator. Logistic regression was used to analyze the data without and with interaction terms between race and SRH.

Results

Overall, good SRH was positively associated with happiness, however, there was a significant interaction between race/ethnicity and good SRH on the outcome (i.e. happiness) . This finding suggested that the boosting effect of good SRH on happiness is weaker for Black than White people.

Conclusion

In the United States, due to a weaker concordance between good health and happiness, Blacks who have poor SRH are more likely to report happiness. At the same time, Whites who are healthy report happiness, however, Blacks who are healthy do not necessarily report happiness. Disjointed link between health and happiness may be due to different racial, ethnic, and cultural perceptions of physical health and happiness as well as salience of physical health as a component of happiness. This may be an adaptive response of Blacks to sociopolitical as well as health-related adversities over centuries as a result of the combination of oppression, injustice, and poverty.

Inflammation and Trauma-Related Psychopathology in Syrian and Iraqi Refugees

Refugees experience high rates of post-traumatic stress disorder (PTSD), anxiety, and depression due to exposure to civilian war trauma and forced migration. Inflammatory products may offer viable biological indicators of trauma-related psychopathology in this cohort, promoting rapid and objective assessment of psychopathology. Incoming Syrian and Iraqi refugees (n = 36) ages 18-65 completed self-report measures of PTSD, anxiety, and depression and provided saliva samples during an assessment at a primary care clinic within the first month of resettlement in the United States. Interleukin 1β (IL-1β) and C-reactive protein (CRP) differentially correlated with symptom severity by domain, and there was a non-significant trend for sex moderating the relation between inflammation and PTSD symptoms. Our findings show unique relations between trauma-related psychopathology and inflammation. There is a need for further research in diverse ethnic cohorts with differential trauma exposures for inflammation to be considered a biological indicator of psychopathology.

Recruiting Immigrant and Refugee Arab American Mother-Father-Infant Triads Resettling in the United States: A Feasibility Study

BACKGROUND

Recent Iraqi and Syrian immigrant families are exposed to stress, anxiety, and depressive symptoms due to civil war. Recruitment challenges specific to conducting research within this population include the lack of knowledge about research, stigma of mental illness, and mistrust.

PURPOSES

Among immigrant Iraqi and Syrian families: (1) evaluate the approach to recruitment and retention; and (2) evaluate the acceptability of the study procedures.

METHODS

This feasibility study was conducted based on the work of Orsmond and Cohn. It is focused on the evaluation of recruitment capability and resulting sample characteristics and evaluation of acceptability and suitability of the study procedures. Mother-father-infant triads were recruited from a community center. Parents completed questionnaires about stress and depressive symptoms. Buccal swab samples were obtained from the triads to measure telomere length, and infant hair samples were obtained to measure cortisol level. Telomere length and hair cortisol were utilized as measures of chronic stress.

RESULTS

Ten mother-father-infant triads were enrolled out of 11 approached. Challenges faced this study included inability to reach families by telephone and the effect of cultural norms where the husband's permission was needed before proceeding, resulting in a slow pace of recruitment. The study strategy and procedures appeared to be feasible as all of the families who participated completed all study protocols.

CONCLUSION

This study provides feasibility data to inform the launching of a larger study to examine the associations of family stress with infant stress and development. These findings from Iraqi and Syrian families may be generalizable to studies seeking to recruit these and other immigrant and refugee population families.

Moving Through the Trauma: Dance/Movement Therapy as a Somatic-Based Intervention for Addressing Trauma and Stress Among Syrian Refugee Children

Traumatic experiences are common in youth, with some reporting that 20% of youth have experienced trauma.¹ Some populations have higher exposure. More than 50% of refugee youth with exposure to civilian war trauma and forced migration experience high anxiety; up to 30% screen positive for posttraumatic stress disorder (PTSD).^2,3 Trauma exposure during critical developmental periods can have detrimental social, educational, and physical consequences. Current evidence-based therapeutics have primarily been researched in adults; child anxiety disorders are undertreated and underresearched.^4,5 Psychotherapy for refugee and other highly vulnerable populations may be limited by high cost and scarcity of skilled trauma specialists; culturally informed and language-capable clinicians who can meet the needs of refugee populations are even more rare. Furthermore, pharmacotherapy is limited by a sparse evidence base, parental and child preferences, and cost-all factors that again are more prevalent in refugee populations. Overall, evidence for treatment of PTSD and anxiety in refugee children is limited and largely extrapolated from treatment for children with other types of trauma exposure. Dance/movement therapy (DMT) is a manualized, multimodal intervention that aims to strengthen emotional, cognitive, physical, and social integration. DMT sessions are led by a licensed dance/movement therapist with joint education in counseling.⁶ Owing to its integration of exposure, mindfulness, and somatic components, DMT may be a candidate for a multifaceted, multitarget treatment approach to trauma and stress addressing psychological and somatic symptoms, both of which can be present in trauma-related conditions. However, evidence of use of DMT to help traumatized children is lacking. With the state of Michigan's high volume of Syrian refugees and knowing the need for intervention with understanding of barriers of culture, language, and access, our team selected to test acceptance and feasibility of DMT as a possible way to address trauma-related symptoms in Syrian refugee youth.

Neuroticism polygenic risk score predicts 20-year burden of depressive symptoms for Whites but not Blacks

BACKGROUND

Black-White differences are reported in social, psychological, behavioral, medical, and biological correlates of depression. This study was conducted to compare Black and White older adults for the association between neuroticism polygenic risk score (N-PRS) and chronicity of depressive symptoms over 20 years.

METHODS

Data came from the Health and Retirement Study (HRS), 1990 - 2012, a nationally representative sample of Americans above age 50. Current analysis followed 9,249 individuals (7,924 Whites and 1,325 Blacks) for up to 22 years. Depressive symptoms were measured every two years between 1992 and 2012 using the 8-item Center for Epidemiological Studies-Depression Scale (CES-D-8). The independent variable was N-PRS. The dependent variable was average depressive symptoms between 1992 and 2012. Linear regression was used for data analysis.

RESULTS

In the pooled sample, higher N-PRS was associated with higher average depressive symptoms over the 20-year follow up period [b=0.01, 95%CI=0.00 to 0.04], net of all covariates. We also found an interaction between race and N-PRS [b=-0.02, 95%CI=-0.03 to 0.00], suggesting a stronger effect of N-PRS on 20-year average depressive symptoms for Whites than Blacks. Based on our race-specific linear regression models, higher N-PRS was associated with higher depressive symptoms from 1992 to 2012 for Whites [b=0.01, 95%CI=0.01 to 0.02] but not Blacks [b=0.00, 95%CI=-0.02 to 0.02].

CONCLUSION

Black and White older adults may differ in the salience of the existing N-PRS for depressive symptoms, which better reflects the burden of depression for Whites than Blacks. This may be because the existing PRSs are derived from mostly or exclusively White samples, limiting their applicability in other race groups. Racial variation in psychosocial, clinical, and biological correlates of depression needs further research.

A Theory of Everything: Overlapping Neurobiological Mechanisms of Psychotherapies of Fear and Anxiety Related Disorders

Similarities within the phenomenology, neurobiology, psychotherapeutic, and pharmacological treatments of distinctly categorized anxiety and fear related disorders suggest the involvement of common neurobiological mechanisms in their formation. This theory of integration is the focus of the Research Domain Criteria (RDoC) approach initiated by the NIH. The current article explores potential facets of overlap among mainstream methods of psychotherapy for anxiety, fear, and trauma related disorders. These overlaps include associative learning of safety, cognitive reappraisal and emotion regulation, therapist as a social safety cue, and contextualization. Temporal contextualization and placing memories in their time and place will be suggested as a potentially important, and less explored aspect of psychotherapy.

Gene by Culture Effects on Emotional Processing of Social Cues among East Asians and European Americans

While Western cultures are more focused on individualization and self-expression, East Asian cultures promote interrelatedness. Largely unknown is how gene by culture interactions influence the degree to which individuals acquire culture, and the neurocircuitry underlying how social cues are processed. We sought to examine the interaction between DRD4 polymorphism and culture in the neural processing of social emotional cues. 19 Asian-born East Asian (AA) and 20 European American (EA) participants performed a shifted attention emotion appraisal functional magnetic resonance imaging (fMRI) task, which probes implicit emotional processing and regulation in response to social emotional cues. Half of the participants in each group were DRD4 2- or 7-repeat allele (2R/7R) carriers. AA participants showed larger left and right amygdala, and left hippocampal activation during implicit processing of fearful faces. There was a gene by culture interaction in the left insula during implicit processing of facial cues, while activation in EA DRD4 2R/7R carriers was larger than EA non-carriers and AA carriers. Our findings suggest that emotional facial cues are more salient to AA participants and elicit a larger amygdala reaction. Gene by culture interaction finding in insula suggests that DRD4 2R/7R carriers in each culture are more prone to adopting their cultural norm.

Effects of Bupropion on Cognitive Function in Schizophrenia: A Double Blind Randomized Controlled Trial

<p>Smoking habits are common in schizophrenic patients. Nicotine can suppress negative symptoms and cognitive impairments. The aim of this study was to determine the efficacy of bupropion on cognitive function in schizophrenic patients.<strong> </strong>This study is a double blind randomized controlled trial in a large referral psychiatric university hospital in Iran. Ninety smoker schizophrenic patients were randomly allocated (based on DSM -IV TR criteria) in two groups (46 patients for case group and 44 patients in control group). They get risperidone up to 6 mg/d and bupropion up to 400 mg/d .clinical assessment (Positive and Negative Syndrome Scale (PANSS), Brief psychiatric rating scale (BPRS) were taken in beginning of study, 14^th and 28^th days of study. Cognitive assessment (Stroop, Digit Span, and Wechsler, Wisconsin) were taken in begging of study, the days 2^nd, 7^th, 14^th, 28^th. All data were analyzed by SPSS Ver. 17 with analytic and descriptive tests. Mean age of patients was 37.66±1.01. Mean duration of disorder was 11.63±.98 years. The scores were significantly lower at the day 28^th compared to the beginning of the study in both groups in Wechsler, Stroop color word , Stroop word , Stroop color , BPRS, PANSS p value ≤0.05 .The difference between the two treatments was not significant as indicated by the effect of group, the between-subjects factor<strong> </strong><strong>p </strong>value ≥0.05. In this study, the side effects were examined and there was no significant difference between the two groups p value ≥0.05.<strong> </strong>Augmentation of bupropion to routine treatment improves cognitive symptoms of schizophrenia in abstinence of tobacco.</p>

Instructed fear learning, extinction, and recall: additive effects of cognitive information on emotional learning of fear

The effects of instruction on learning of fear and safety are rarely studied. We aimed to examine the effects of cognitive information and experience on fear learning. Fourty healthy participants, randomly assigned to three groups, went through fear conditioning, extinction learning, and extinction recall with two conditioned stimuli (CS+). Information was presented about the presence or absence of conditioned stimulus-unconditioned stimulus (CS-US) contingency at different stages of the experiment. Information about the CS-US contingency prior to fear conditioning enhanced fear response and reduced extinction recall. Information about the absence of CS-US contingency promoted extinction learning and recall, while omission of this information prior to recall resulted in fear renewal. These findings indicate that contingency information can facilitate fear expression during fear learning, and can facilitate extinction learning and recall. Information seems to function as an element of the larger context in which conditioning occurs.

Childhood Cumulative Risk Exposure and Adult Amygdala Volume and Function

Considerable work indicates that early cumulative risk exposure is aversive to human development, but very little research has examined the neurological underpinnings of these robust findings. This study investigates amygdala volume and reactivity to facial stimuli among adults (mean 23.7 years of age, n = 54) as a function of cumulative risk exposure during childhood (9 and 13 years of age). In addition, we test to determine whether expected cumulative risk elevations in amygdala volume would mediate functional reactivity of the amygdala during socioemotional processing. Risks included substandard housing quality, noise, crowding, family turmoil, child separation from family, and violence. Total and left hemisphere adult amygdala volumes were positively related to cumulative risk exposure during childhood. The links between childhood cumulative risk exposure and elevated amygdala responses to emotionally neutral facial stimuli in adulthood were mediated by the corresponding amygdala volumes. Cumulative risk exposure in later adolescence (17 years of age), however, was unrelated to subsequent adult amygdala volume or function. Physical and socioemotional risk exposures early in life appear to alter amygdala development, rendering adults more reactive to ambiguous stimuli such as neutral faces. These stress-related differences in childhood amygdala development might contribute to the well-documented psychological distress as a function of early risk exposure.

Childhood Poverty Predicts Adult Amygdala and Frontal Activity and Connectivity in Response to Emotional Faces

Childhood poverty negatively impacts physical and mental health in adulthood. Altered brain development in response to social and environmental factors associated with poverty likely contributes to this effect, engendering maladaptive patterns of social attribution and/or elevated physiological stress. In this fMRI study, we examined the association between childhood poverty and neural processing of social signals (i.e., emotional faces) in adulthood. Fifty-two subjects from a longitudinal prospective study recruited as children, participated in a brain imaging study at 23–25 years of age using the Emotional Faces Assessment Task. Childhood poverty, independent of concurrent adult income, was associated with higher amygdala and medial prefrontal cortical (mPFC) responses to threat vs. happy faces. Also, childhood poverty was associated with decreased functional connectivity between left amygdala and mPFC. This study is unique, because it prospectively links childhood poverty to emotional processing during adulthood, suggesting a candidate neural mechanism for negative social-emotional bias. Adults who grew up poor appear to be more sensitive to social threat cues and less sensitive to positive social cues.

Neural circuits in anxiety and stress disorders: a focused review

Anxiety and stress disorders are among the most prevalent neuropsychiatric disorders. In recent years, multiple studies have examined brain regions and networks involved in anxiety symptomatology in an effort to better understand the mechanisms involved and to develop more effective treatments. However, much remains unknown regarding the specific abnormalities and interactions between networks of regions underlying anxiety disorder presentations. We examined recent neuroimaging literature that aims to identify neural mechanisms underlying anxiety, searching for patterns of neural dysfunction that might be specific to different anxiety disorder categories. Across different anxiety and stress disorders, patterns of hyperactivation in emotion-generating regions and hypoactivation in prefrontal/regulatory regions are common in the literature. Interestingly, evidence of differential patterns is also emerging, such that within a spectrum of disorders ranging from more fear-based to more anxiety-based, greater involvement of emotion-generating regions is reported in panic disorder and specific phobia, and greater involvement of prefrontal regions is reported in generalized anxiety disorder and posttraumatic stress disorder. We summarize the pertinent literature and suggest areas for continued investigation.

Evoked potential correlates of post-traumatic stress disorder in refugees with history of exposure to torture

The presence and magnitude of information processing deviations associated with Post-Traumatic Stress Disorder (PTSD) are far from being well-characterized. In this study we assessed the auditory and visually evoked cerebral responses in a group of Iraqi refugees who were exposed to torture and developed PTSD (N = 20), Iraqi refugees who had been exposed to similar trauma but did not develop PTSD (N = 20), and non-traumatized controls matched for age, gender, and ethnicity (N = 20). We utilized two paired-stimulus paradigms in auditory and visual sensory modalities, respectively. We found significantly smaller amplitudes of both the auditory P50 and the visual N75 responses in PTSD patients compared to controls, reflecting decreased response to simple sensory input during a relatively early phase of information processing (interval 50-75 ms post stimulus). In addition, deficient suppression of the P50/N75 response to repeating stimuli at this early stage in both modalities is indicative of difficulty in filtering out irrelevant sensory input. Among associations between electrophysiological and clinical measures, a significant positive correlation was found between dissociation score and P50 S1 amplitudes (p = 0.024), as well as stronger auditory P50 gating correlated with higher quality-of-life index scores (p = 0.013). In addition, smaller amplitudes of N150 visual evoked response to S1 showed a significant association with higher avoidance scores (p = 0.015). The results of this study highlight the importance of early automatic auditory and visual evoked responses in probing the information processing and neural mechanisms underlying symptomatology in PTSD.

The incidence of cross infections in Imam Reza hospital, Mashhad, Iran

BACKGROUND AND OBJECTIVES

Cross Infections (CIs) are considered as a major public health problem worldwide. They cause delay in recovery, increased mortality and morbidity. The purpose of this study is to report the incidence of CIs in our teaching hospital during a 23-month period.

MATERIALS AND METHODS

In this descriptive cross-sectional study, 76766 patients from 2009 to 2011 admitted to 17 wards of Imam Reza Hospital in Mashhad were studied for CIs. Patients' age, sex, site of infection, ward of hospitalization and type of microbial infections were collected and analyzed by SPSS 16.0.

CONCLUSION

Results of the present study showed that the incidence of CIs was low (i.e.<1%) in our hospital and Acinetobacter (25.8%, n = 176) was the most frequent pathogen.

A neural network model for schemas based on pattern completion

Abstract Recent developments in neuroscience have provided us with a wealth of the basic knowledge and tools which are required for neurobiological understanding of the psychological concepts. This advantage enables contemporary scientists to suggest and test brain models for psychological concepts, theories, and methods. Considering the current dominance of biological ideas in psychiatry and psychology, such models are essential in confirmation of the psychological theories of mind. In this article a brain model for schemas as essential to cognitive theory is proposed. Schemas are seen as patterns which are recognized and memorized through the training phase of an autoassociative neural network. Then, these patterns are used to complete ambiguous aspects of future experiences through thalamo and hippocampal-cortical pathways. In relation to the self or the outside world when a pattern with unknown, noisy, or vague aspects is encountered, those aspects are completed by the principal components of previously learned patterns (schema). This process is to help the observer acquire a better understanding of the environment or the self. However, the patterns which are used to complete the uncertainties about the self or the environment are sometimes not good estimates of the reality and lead the person/patient to an illusionary perception of the self/environment. In this article, the role of the mirror neuron system in pattern recognition is also explained. Psychological and biological therapeutic implications of this model are discussed and the importance of a link between dynamic and cognitive therapies is rationalized.