Examining Relationships between Functional and Structural Brain Network Architecture, Age, and Attention Skills in...

Area of Science:

• Neuroscience
• Developmental Psychology
• Brain Imaging

Background:

• Early childhood is a critical period for brain development, with significant experience-dependent changes in brain structure and function.
• The relationship between structural connectivity (SC) and functional connectivity (FC) in the developing brain is complex and not fully understood, especially concerning age and attention.
• Understanding these connections is crucial for identifying developmental trajectories and potential cognitive challenges.

Purpose of the Study:

• To investigate the longitudinal relationship between structural connectivity (SC), functional connectivity (FC), age, and attention in early childhood.
• To examine how brain network properties change over time and how these changes relate to cognitive development.
• To determine whether SC, FC, or their coupling is a stronger predictor of age and attentional performance.

Main Methods:

• Longitudinal study involving children aged 4-7 years with a 1-year follow-up.
• Neuroimaging techniques including diffusion-weighted imaging (for SC) and functional magnetic resonance imaging (for FC).
• Assessment of selective, sustained, and executive attention, coupled with graph theory analysis of brain networks and partial least squares modeling.

Main Results:

• Observed longitudinal changes in functional graph metrics and age-related decreases in SC modularity.
• Identified region-specific brain-behavior relationships, linking structural topology to age and attentional performance.
• Structural connectivity (SC) emerged as a dominant predictor of age compared to FC and SC-FC coupling.

Conclusions:

• Early childhood is a dynamic period where cognitive functions, particularly attention, are predominantly linked to the brain's structural network features.
• Structural connectivity plays a more significant role than functional connectivity in predicting age-related changes in brain networks during early development.
• These findings highlight the importance of structural brain development for cognitive maturation in young children.