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Amygdala Functional Connectivity and Negative Reactive Temperament at Age 4 Months
Courtney A Filippi1, Sanjana Ravi2, Maya Bracy2
1University of Maryland, College Park; National Institute of Mental Health (NIMH), Bethesda, Maryland.
Summary
Infant amygdala connectivity, specifically between the amygdala and cingulate/frontal regions, is linked to negative emotional responses to novelty. This finding offers insights into the developmental origins of anxiety risk.
Area of Science:
- Neuroscience
- Developmental Psychology
- Child Psychiatry
Background:
- Infant temperament, particularly distress to novelty, is a predictor of later psychopathology.
- Maternal reports link infant amygdala connectivity to temperament, but direct observational data is lacking.
Purpose of the Study:
- To investigate the relationship between infant amygdala connectivity and observed novelty-evoked distress.
- To explore how amygdala connectivity relates to both positive and negative affect during novelty exposure.
Main Methods:
- Assessed novelty-evoked distress in 90 infants at 4 months using a standardized reactivity assessment.
- Collected resting-state functional magnetic resonance imaging (fMRI) in 34 infants.
- Utilized a whole-brain voxelwise approach to analyze amygdala connectivity in relation to observed affect.
Main Results:
- Increased amygdala-cingulate and amygdala-superior frontal gyrus connectivity correlated with lower positive affect during novelty exposure.
- Amygdala-cingulate connectivity showed a stronger association with negative affect than positive affect.
- Longitudinal validation confirmed that negative reactivity at 4 months predicted adolescent anxiety symptoms.
Conclusions:
- Findings illuminate the neural underpinnings of early novelty-evoked distress.
- This research supports the role of altered cognitive control mechanisms in temperamental anxiety risk.
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