Brain Functional-Structural Gradient Coupling Reflects Development, Behavior and Genetic Influences

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Computational Neuroscience

Background:

• Brain organization is increasingly characterized by macroscale connectivity gradients.
• The developmental trajectory and biological underpinnings of structural-functional gradient coupling are not well understood.

Purpose of the Study:

• To investigate the developmental evolution of structural-functional gradient coupling.
• To explore the relationship between gradient coupling, behavior, and molecular features.
• To determine the genetic and cellular basis of gradient coupling.

Main Methods:

• Analysis of high-resolution structural and functional connectivity data from large child and adult cohorts (ABCD and HCP studies).
• Examination of gradient coupling across multiple metrics and spatial scales.
• Application of cognitive and mental health assessments.
• Heritability and transcriptomic analyses.

Main Results:

• Structural-functional gradient coupling shows significant developmental refinement from childhood to adulthood.
• Distinct sex-specific patterns in gradient coupling were observed.
• Gradient coupling metrics correlate with cognitive abilities and mental health outcomes, enabling predictive modeling.
• Strong genetic influence on gradient coupling was identified.
• Heritable coupling patterns are enriched for genes in deep-layer excitatory neurons.

Conclusions:

• Structural-functional gradient coupling is a key feature of brain organization that matures during development.
• Gradient coupling links macroscale brain connectivity to cognitive, behavioral, and molecular levels.
• This coupling reflects underlying cell-type-specific transcriptional architecture and genetic influences.