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Making Connections: Neurodevelopmental Changes in Brain Connectivity After Adverse Experiences in Early Adolescence
Ayla Pollmann1, Remo Sasso2, Kathryn Bates3
1Institute of Psychiatry, Psychology & Neuroscience, King's College London, London SE5 8AF, United Kingdom ayla.pollmann@kcl.ac.uk.
Summary
Adverse childhood experiences impact adolescent brain connectivity, influencing white matter tracts. Family conflict and socioeconomic factors are linked to altered brain development pathways.
Area of Science:
- Neuroscience
- Developmental Psychology
- Public Health
Background:
- Adverse childhood experiences (ACEs) are linked to negative adult mental health outcomes.
- Brain connectivity is a potential neurodevelopmental pathway mediating the effects of ACEs.
- Understanding these pathways is crucial for early intervention and prevention strategies.
Purpose of the Study:
- To investigate the relationship between adverse experiences in early adolescence and structural brain connectivity.
- To identify specific brain regions and white matter tracts affected by family conflict, socioeconomic status, and neighborhood safety.
- To explore trajectories of brain connectivity over time in relation to these adverse experiences.
Main Methods:
- Utilized data from the Adolescent Brain Cognitive Development (ABCD) study (N≈12,000, ages 9-13).
- Assessed structural brain connectivity using fractional anisotropy (FA) of white matter tracts.
- Employed k-means clustering, latent basis growth models, and multinomial regression to analyze associations between ACEs and brain connectivity patterns.
Main Results:
- Higher family conflict correlated with increased FA in multiple brain tracts, including the corpus callosum (CC), fornix, and anterior thalamic radiations (ATR).
- A decreasing FA trajectory over time was associated with lower socioeconomic status and neighborhood safety.
- Socioeconomic status and neighborhood safety showed significant associations with FA in specific white matter tracts (CC, fornix, ATR).
Conclusions:
- Adverse experiences during early adolescence are intricately linked to alterations in brain connectivity.
- These findings highlight a complex, multifaceted relationship between early life adversity and neurodevelopment.
- Emphasizes the importance of studying ACEs beyond early childhood for understanding lifelong developmental trajectories and mental health outcomes.
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