Brain functional-structural gradient coupling reflects development, behavior and genetic influences

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Cognitive Neuroscience

Background:

• Brain organization is often described using low-dimensional representations called gradients.
• The developmental trajectory and biological underpinnings of structural-functional gradient coupling remain largely unknown.

Purpose of the Study:

• To investigate the development and characteristics of structural-functional gradient coupling.
• To explore the relationship between gradient coupling, behavior, and molecular factors.

Main Methods:

• Utilized high-resolution structural and functional connectivity data from large cohorts of children (Adolescent Brain Cognitive Development study) and adults (Human Connectome Project).
• Employed multiple metrics and spatial scales to analyze gradient coupling.
• Conducted heritability and transcriptomic analyses.

Main Results:

• Structural-functional gradient coupling undergoes developmental refinement from childhood to adulthood, exhibiting distinct sex-specific patterns.
• Gradient coupling metrics correlate significantly with cognitive and mental health measures, allowing for accurate predictions.
• Heritability analyses indicate strong genetic influence, with enriched gene expression in deep-layer excitatory neurons for highly heritable patterns.

Conclusions:

• Structural-functional gradient coupling is a key feature of brain organization, bridging macroscale connectivity with cognition, behavior, and molecular architecture.
• This coupling demonstrates significant developmental changes and genetic underpinnings.
• Findings highlight the biological significance of gradient coupling in understanding brain development and function.