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  3. Neuro-evolutionary Evidence For A Universal Fractal Primate Brain Shape.
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Neuro-evolutionary evidence for a universal fractal primate brain shape.

Yujiang Wang1,2,3, Karoline Leiberg1, Nathan Kindred2

  • 1CNNP Lab (https://www.cnnp-lab.com), School of Computing, Newcastle University, Newcastle upon Tyne, United Kingdom.

Elife
|September 30, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

All primate cerebral cortices share a universal fractal shape, regardless of size or species. This finding offers a new way to precisely measure brain morphology and its changes with age.

Keywords:
ChimpanzeeMarmosetcortexevolutionary biologyhumanmorphologyneurosciencerhesus macaque

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Area of Science:

  • Neuroscience
  • Comparative Anatomy
  • Mathematical Biology

Background:

  • Cerebral cortex morphology exhibits significant diversity across species.
  • Understanding the underlying principles of cortical folding remains a challenge.

Purpose of the Study:

  • To present a universal multi-scale description of primate cortical shapes.
  • To establish a common morphometric trajectory for mammalian cortices.
  • To enable precise, scale-dependent quantification of brain morphology.

Main Methods:

  • Analysis of cortical folding patterns in 11 primate species.
  • Development of a scale-free morphometric model.
  • Comparison with data from over 70 other mammalian species.

Main Results:

  • All primate cortices approximate a single archetypal fractal shape (fractal dimension d = 2.5).
  • Cortical shapes follow a common scale-free morphometric trajectory during fold merging.
  • A scale-dependent effect of aging on brain morphology was identified, with increased effect size at ~2 mm scale.

Conclusions:

  • Cerebral cortex shape is governed by universal fractal principles.
  • This framework allows for more accurate quantification of brain morphology across scales.
  • The findings may lead to improved biomarkers for neurological conditions.