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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.