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Updated: Dec 14, 2025

Profiling Maternal Behavior Responses During Whole-Brain Imaging
Published on: January 24, 2025
Mother-Infant Interaction and Child Brain Morphology: A Multidimensional Approach to Maternal Sensitivity
Annie Bernier1, Fanny Dégeilh1, Élizabel Leblanc1
1Department of Psychology, University of Montreal.
Maternal sensitivity in infancy, specifically accessibility and positivity, was linked to children's brain structure development. Higher maternal accessibility predicted smaller amygdala volume, while greater positivity predicted smaller hippocampal volume in children.
Area of Science:
- Neuroscience
- Developmental Psychology
- Child Development
Background:
- Child brain development is sensitive to early environmental influences.
- Limited longitudinal research exists on infant parenting quality and brain development indicators.
- Previous studies were cross-sectional, examining parenting and brain development.
Purpose of the Study:
- To investigate if maternal sensitivity dimensions in infancy predict brain structure volumes in childhood.
- To examine the longitudinal relationship between specific aspects of maternal sensitivity and amygdala/hippocampus volumes.
- To explore how different facets of maternal behavior relate to distinct neurodevelopmental outcomes.
Main Methods:
- Longitudinal study design with 33 mother-infant dyads.
- Observation of three maternal sensitivity dimensions (Cooperation/Attunement, Positivity, Accessibility/Availability) at 1 year of age.
- Structural magnetic resonance imaging (MRI) of children's brains at age 10.
Main Results:
- Higher maternal Accessibility/Availability predicted smaller right amygdala volume.
- Greater maternal Positivity predicted smaller bilateral hippocampal volumes.
- Different dimensions of maternal sensitivity showed distinct associations with brain structure volumes.
Conclusions:
- Maternal sensitivity during infancy longitudinally predicts specific brain structure volumes in childhood.
- Findings highlight the differential impact of various maternal behavior facets on neurodevelopment.
- A multidimensional approach to parenting research is crucial for understanding child brain development.
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