Cognitive ability in childhood predicts adolescent structural and functional brain development: A longitudinal study.

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Childhood cognitive ability is linked to brain structure and connectivity.
• Longitudinal studies on early cognition and multimodal brain development are scarce.

Purpose of the Study:

• To investigate associations between childhood cognitive ability and longitudinal brain development.
• Examine links with gray matter, white matter, and resting-state functional connectivity (rsFC).

Main Methods:

• Utilized longitudinal data from 10,495 participants in the Adolescent Brain Cognitive Development study.
• Employed linear mixed-effects models to analyze baseline cognition (matrix reasoning, fluid, crystallized) and brain measure trajectories.
• Assessed cortical thickness, surface area, volume, fractional anisotropy, mean diffusivity, and rsFC across four time points.

Main Results:

• Higher baseline cognitive scores correlated with altered developmental trajectories across brain structure and connectivity.
• Childhood fluid cognition linked to faster gray matter contraction; matrix reasoning to slower white matter fractional anisotropy increases.
• Lower cognitive scores associated with increased between-network rsFC, while higher scores showed absent increases.

Conclusions:

• Early cognitive ability is associated with distinct longitudinal brain development patterns.
• Findings suggest neurobiological pathways linking childhood cognition to adolescent brain maturation and long-term outcomes.
• Highlights the importance of early cognitive function in shaping brain development trajectories.