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The influence of stressful life events on trajectories of brain development and psychopathological symptoms in adolescence

Subject Area General, Cognitive and Mathematical Psychology
Developmental and Educational Psychology
Term from 2016 to 2024
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 290210763
 
Final Report Year 2024

Final Report Abstract

The overarching aim was to investigate, longitudinally, the influence of stressful life events on trajectories of brain development over the course of adolescence until young adulthood. At the same time, we aimed to explore whether potentially altered developmental brain trajectories might be associated with greater likelihood of exhibiting psychopathological symptoms. To this end, structural and functional magnetic resonance imaging scans were assessed at ages 14, 16, 18, and 21 at the two sites Dresden and Paris. The project’s results are threefold: first, the field in clinical developmental cognitive neuroscience might profit from our strong methodical groundwork that covers guidelines on quality control of structural MRI images, study design, specificities of the development of different structural brain measures, and how to address and conceptualize reliability. We also demonstrate the functional development of subcortical regions (amygdala) related to matching emotional pictures and their reliability. Second, we provide results for longitudinal trajectories of subcortical and cortical brain development in our large sample of over 500 adolescent participants from the two sites Dresden and Paris (Backhausen et al., 2024). Third, the integration of the project’s objectives was achieved for structural brain development of the orbitofrontal cortex and the impact of stressful life events in childhood on depression in young adulthood. Moreover, final analyses focused on intra- and interindividual variability in brain development and the relationship of general psychopathology and brain development. In our integrative analysis, we studied the impact of common stressful life events in childhood and early adolescence, ranging from illness/death in the family to social/school problems, on depressive symptoms in young adulthood at age 21. Stressful life events prior to age 14 were found to cumulatively impact on depressive symptoms in young adulthood, up to 8 years later. Depressive symptoms in young adulthood were also predicted by a thicker orbitofrontal cortex at age 14 and an accelerated orbitofrontal cortex thinning, i.e. an accelerated maturation, across adolescence. Other than expected, orbitofrontal cortex development during adolescence did not mediate effects of negative life events on depressive symptoms. This underscores the complexity of neurobiological mechanisms underlying the long-lasting effects of childhood experiences on mental health. The assessment of relatively early but rather common stressful life events in addition to acute negative life events may be warranted in clinical practice to identify individuals at risk for depression.

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