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Gyral peaks and patterns in human brains.

Songyao Zhang1, Tuo Zhang1, Zhibin He1

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|January 16, 2023
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Researchers identified 96 human brain gyral peaks, revealing their spatial consistency and unique structural/functional properties. These findings offer insights into cortical landmarks and their relation to brain function and behavior.

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Area of Science:

  • Neuroscience
  • Human Brain Anatomy
  • Computational Neuroscience

Background:

  • Cortical folding patterns influence brain function, cognition, and behavior.
  • Previous research identified invariant sulcal pits and gyral peaks in macaque brains, suggesting a genetic basis.
  • Investigating human brain gyral peaks is challenging due to high inter-individual variability.

Purpose of the Study:

  • To identify and characterize gyral peaks in the human brain.
  • To investigate the spatial consistency and structural/functional properties of human gyral peaks.
  • To explore the relationship between gyral peak characteristics and cortical organization.

Main Methods:

  • Identification of 96 gyral peaks in both left and right human brain hemispheres.
  • Analysis of spatial consistency across individuals, correlating peak height/sharpness with consistency.
  • Evaluation of structural and functional graph metrics for peaks compared to other cortical regions.

Main Results:

  • Successfully identified 96 spatially consistent gyral peaks in human brains.
  • Higher and sharper peaks demonstrated greater inter-subject consistency.
  • Gyral peaks exhibit distinct structural and functional graph metrics, anti-correlated with spatial consistency.

Conclusions:

  • Human gyral peaks serve as consistent cortical landmarks.
  • These landmarks possess unique network properties related to their consistency.
  • Findings provide insights into brain function, cognition, and behavior in healthy and aberrant brains.