Air Pollution, Early Adversity, and Amygdala: Environmental Correlates of Psychopathology in Preadolescents
Early life adversity (ELA) and ambient fine particulate matter (PM2.5) are hypothesized to be environmental risk factors for altered brain structure and psychopathology, but their unique and interactive effects in childhood remain unclear. This study examines the interactive associations of ELA and annual average residential PM2.5 exposure (total mass and 15 components) on total amygdala and…
A new study explores the combined impact of early life adversity (ELA) and air pollution on the brain development and mental health of preadolescents. Researchers investigated how these environmental factors interact to influence the size of the amygdala, a key brain region involved in emotion regulation, and psychopathology symptoms in 3,601 children aged 9-10 years, a subset of the larger Adolescent Brain Cognitive Development Study.
The analysis revealed that ELA was linked to higher prevalence of generalized, specific internalizing, and externalizing psychopathology symptoms. Furthermore, the study found that exposure to higher levels of fine particulate matter (PM2.5) exacerbated the negative impact of ELA, particularly in relation to specific externalizing symptoms.
Interestingly, among children with elevated levels of ELA, smaller volumes of the basolateral paralaminar region of the amygdala were associated with greater overall and specific externalizing symptoms. These findings highlight the significance of considering both psychosocial and environmental exposures when assessing children's vulnerability to psychopathology.
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