Triple Network Functional Connectivity During Acute Stress in Adolescents and the Influence of Polyvictimization

BACKGROUND

Exposure to both chronic and acute stressors can disrupt functional connectivity (FC) of the default mode network (DMN), salience network (SN), and central executive network (CEN), increasing risk for negative health outcomes. During adolescence, these stress-sensitive triple networks undergo critical neuromaturation that is altered by chronic exposure to general forms of trauma or victimization. However, no work has directly examined how acute stress affects triple network FC in adolescents or whether polyvictimization-exposure to multiple categories/subtypes of victimization-influences adolescent triple network neural acute stress response.

METHODS

This functional magnetic resonance imaging study examined seed-to-voxel FC of the DMN, SN, and CEN during the Montreal Imaging Stress Task. Complete data from 73 participants aged 9 to 16 years (31 female) are reported.

RESULTS

During acute stress, FC was increased between DMN and CEN regions and decreased between the SN and the DMN and CEN. Greater polyvictimization was associated with reduced FC during acute stress exposure between the DMN seed and a cluster containing the left insula of the SN.

CONCLUSIONS

These results indicate that acute stress exposure alters FC between the DMN, SN, and CEN in adolescents. In addition, FC changes during stress between the DMN and SN are further moderated by polyvictimization exposure.

Stress-related hippocampus activation mediates the association between polyvictimization and trait anxiety in adolescents

Early life stress exposures are associated with adverse health outcomes and heightened anxiety symptoms in adolescents. Stress-sensitive brain regions like the hippocampus and amygdala are particularly impacted by early life adversities and are also implicated in the development of anxiety disorders. However, to date, no studies have specifically examined the neural correlates of polyvictimization (exposure to multiple categories of victimization) or the contribution of stress-sensitive neural nodes to polyvictimization's impact on mental health. To elucidate these relationships, the current study analyzed associations between polyvictimization, hippocampal and amygdalar activation during an acute stress task and trait anxiety in a sample of 80 children and adolescents aged 9-16 years (33 female participants). Results showed that polyvictimization was associated with higher trait anxiety as well as greater stress-related right hippocampus activation, and this greater hippocampal activity predicted heightened trait anxiety. Robust mediation analyses revealed that stress-related right hippocampus activation partially mediated the relationship between polyvictimization and trait anxiety. Our results expand upon the existing polyvictimization literature by suggesting a possible neurobiological pathway through which polyvictimization is connected to the etiology of mental illness.

Victimization and Adversity in Child Welfare Involved Youth: The Cumulative Influence on Child and Caregiver Reported Behavioral Health Symptoms

Exposure to childhood victimization and adversity (CVA) is pervasive for child welfare (CW) involved youth. However, most research with CW samples has focused on types of maltreatment and fails to recognize the additive influence of exposure to CVA beyond maltreatment. A subsample aged 8 to 17 (n = 1,887) was drawn from the National Survey of Child and Adolescent Well-Being (NSCAW) II. CVA included six domains. Behavioral health was assessed using the Child Depression Inventory, Trauma Symptom Checklist, and the internalizing and externalizing subscales of the Child Behavior Checklist. Logistic regression was used to explore the association between the number of CVA reported and the risk of clinical-range behavioral health symptoms. Analyses were adjusted for the cluster-based sampling design and sampling weights were applied to provide nationally representative estimates. More than 60% of the sample experienced three or more CVA domains. The number of CVAs reported was associated with all four behavioral health outcomes (p < .001). Children exposed to five or more domains were more likely to report high depressive symptoms (odds ratio [OR] = 5.0), high trauma symptoms (OR = 7.0), and to have internalizing or externalizing symptoms reported by caregivers (OR = 18.0), as compared with children reporting one or less CVAs. Youth involved with CW are exposed to staggeringly high rates of CVA beyond maltreatment. For children who are already at great risk for behavioral health challenges, research to understand screening and interventions for CVA is needed to inform policy and practice initiatives to prevent and mitigate harm.

Traumatic Experience, Polytraumatization, and Perinatal Depression in a Diverse Sample of Adolescent Mothers

This study examines the prevalence of trauma subtypes, polytraumatization, and perinatal depression (PND) in a diverse sample of adolescent mothers to help inform PND prevention, screening, and treatment efforts. We conducted a secondary analysis of a sample (N = 210) of adolescent mothers aged 14 to 20 years from a prospective longitudinal study of PND. Participants were recruited from a county-based, public health prenatal clinic, and data were collected in the prenatal and postpartum periods. In this sample, 81% of adolescent mothers reported at least one trauma experience and 75% reported lifetime experience of intimate partner violence (IPV). The most prevalent trauma types among adolescent mothers reporting PND were sexual trauma prior to age 13 (11.9%), loss of a caregiver or sibling (28.3%), emotional adversity (17.1%), and polytraumatization (43%). Trauma is alarmingly prevalent among adolescent mothers. Results suggest standards of care for adolescent mothers should include screening adolescent mothers for trauma history and provision of appropriate referrals for IPV. Findings support the need for trauma-informed treatment in perinatal public health clinics to decrease potential health risks to both mother and baby.

Pregnant adolescent women's perceptions of depression and psychiatric services in the United States

PROBLEM

Adolescent mothers and their children are at high-risk for depression and the associated negative educational, social, health, and economic outcomes.

BACKGROUND

However, few pregnant adolescent women with depression receive psychiatric services, especially low-income or racial/ethnic minority adolescent women.

AIM

This qualitative study explores perceptions of depression, psychiatric services, and barriers to accessing services in a sample of low-income, pregnant racial/ethnic minority adolescent women. Our goal was to better understand the experiences of depression during pregnancy for these vulnerable adolescent women, and thereby improve their engagement and retention in services for perinatal depression.

METHODS

We recruited 20 pregnant adolescent women who screened positive for depression from 2 public health prenatal clinics in the southeastern United States. Participants were low-income and primarily racial/ethnic minority women between 14 and 20 years old. Data were collected through individual in-depth, ethnographically informed interviews.

FINDINGS

Generally, participants lacked experience with psychiatric services and did not recognize their symptoms as depression. However, participants perceived a need for mood improvement and were interested in engaging in services that incorporated their perspective and openly addressed stigma.

DISCUSSION

Participants reported practical and psychological barriers to service engagement, but identified few cultural barriers. Family perceptions of psychiatric services served as both a barrier and support.

CONCLUSION

Adolescent women are more likely to engage in psychiatric services if those services reduce practical and psychological barriers, promise relief from the symptoms perceived as most meaningful, and address underlying causes of depression. Culture may affect Latina adolescent women's perceptions of depression and services.

Mental Health and Behavioral Outcomes of Sexual and Nonsexual Child Maltreatment Among Child Welfare-Involved Youth

Our research team used the nationally representative National Survey of Child and Adolescent Well-Being II to explore the differences in mental health and behavioral outcomes between children who enter the child welfare system with substantiated sexual abuse and those who enter with exclusively nonsexual maltreatment. The sample included 380 children between the ages of 8 to 17.5 who were substantiated for maltreatment (sexual and nonsexual) and had the same caregivers at both wave 1 and 2 (n = 380). Results show that the average age of children in the sample was 11 years old, and the results corroborate literature that has indicated children and youth with histories of childhood sexual abuse experience significantly more post-traumatic stress disorder symptoms than children with histories of nonsexual maltreatment. This finding held after controlling for baseline trauma symptoms and all covariates, including race, age, placement type, and caregiver characteristics. Childhood sexual abuse was not significantly related to an increase in behavioral symptoms after controlling for covariates. Implications for research and practice are offered.