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Related Experiment Video

Updated: Nov 21, 2025

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A gyrification analysis approach based on Laplace Beltrami eigenfunction level sets.

Rosita Shishegar1, Fabrizio Pizzagalli2, Nellie Georgiou-Karistianis3

  • 1School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Australia; Monash Biomedical Imaging, Monash University, Melbourne, Australia; Department of Biomedical Engineering, University of Melbourne, Melbourne, Australia; The Australian e-Health Research Centre, CSIRO, Melbourne, Australia.

Neuroimage
|January 18, 2021
PubMed
Summary
This summary is machine-generated.

A new Laplace Beltrami-based gyrification index (LB-GI) offers a detailed measure of brain folding patterns. This advanced method reveals insights into cortical maturation and neurodevelopmental disorders across age groups.

Keywords:
Brain developmentCortical foldingCurvatureLaplace Beltrami operatorLocal gyrification index

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Area of Science:

  • Neuroscience
  • Brain Imaging
  • Computational Anatomy

Background:

  • Cortical folding (gyrification) is crucial for brain function and development.
  • Existing gyrification indices (GIs) have limitations in accuracy and detail.
  • Understanding gyrification is key for studying neurodevelopmental disorders.

Purpose of the Study:

  • To introduce a novel Laplace Beltrami-based gyrification index (LB-GI).
  • To assess the LB-GI's ability to capture detailed cortical folding patterns.
  • To investigate cortical maturation from childhood to adulthood using LB-GI.

Main Methods:

  • Developed the Laplace Beltrami-based gyrification index (LB-GI) using eigenfunction level sets.
  • Applied LB-GI to the PING database for human brain analysis.
  • Compared LB-GI results with conventional curvature-based and outer surface-based GIs.

Main Results:

  • LB-GI revealed greater detail in cortical folding, particularly at frontal and posterior regions.
  • Identified negative associations between age and folding in regions like the lingual and occipital cortex.
  • Observed positive associations between age and LB-GI in areas such as the insula and frontal pole.

Conclusions:

  • LB-GI provides a more sensitive measure of cortical gyrification than traditional methods.
  • The LB-GI can enhance understanding of brain development and neurodegeneration.
  • This new index holds promise for large-scale clinical neuroimaging studies.