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Sulcal variability of twins.

G Lohmann1, D Y von Cramon, H Steinmetz

  • 1Max-Planck-Institute of Cognitive Neuroscience, Leipzig, Germany.

Cerebral Cortex (New York, N.Y. : 1991)
|November 11, 1999
PubMed
Summary
This summary is machine-generated.

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Genetic factors strongly influence neocortical sulci shape, especially deeper ones. Brain sulcal patterns and overall shape are linked, suggesting shared developmental origins.

Area of Science:

  • Neuroscience
  • Human Anatomy
  • Genetics

Background:

  • Neocortical sulci are complex folds in the human brain.
  • Understanding the factors influencing sulcal pattern development is crucial for neuroscience.
  • Previous research has explored brain morphology but detailed sulcal analysis is less common.

Purpose of the Study:

  • To investigate the genetic and environmental influences on neocortical sulcal patterns.
  • To determine if sulcal shape is predetermined and to what extent.
  • To explore the relationship between overall brain shape and specific sulcal patterns.

Main Methods:

  • Utilized three-dimensional, depth-encoded line representations of neocortical sulci.
  • Analyzed magnetic resonance image (MRI) datasets from 19 pairs of normal monozygotic twins and matched unrelated twin pairs.

Related Experiment Videos

  • Developed new image analysis techniques to automatically extract 'sulcal cuts' from MRI data.

    • Main Results:

    • Monzygotic co-twins exhibited significantly higher sulcal similarity than unrelated twin pairs.
    • Deeper sulci showed greater similarity than superficial sulci, with this effect being stronger in related twins.
    • Individuals with similar overall brain shapes also displayed more similar sulcal patterns.
    • The left posterior lateral hemispheric surface appeared to be the least variable brain region.

    Conclusions:

    • The shape of deep neocortical sulci is more strongly genetically predetermined than superficial sulci.
    • Both genetic and shared environmental factors likely contribute to sulcal pattern development.
    • Brain shape and sulcal patterns may arise from related developmental processes.
    • Further research is needed to disentangle the precise genetic and environmental contributions.