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Related Experiment Video

Updated: Jun 21, 2026

Preparation of Acute Slices from Dorsal Hippocampus for Whole-Cell Recording and Neuronal Reconstruction in the Dentate Gyrus of Adult Mice
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Published on: April 3, 2021

Minicolumnar width: Comparison between supragranular and infragranular layers.

Manuel F Casanova1, Ayman El-Baz, Eric Vanbogaert

  • 1Department of Psychiatry and Behavioral Sciences, University of Louisville, Louisville, KY 40292, United States. m0casa02@louisville.edu

Journal of Neuroscience Methods
|July 21, 2009
PubMed
Summary

The study measured minicolumnar core widths in human brain tissue, revealing significant differences between supra- and infra-granular layers. These findings challenge previous assumptions about minicolumn structure and development.

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Last Updated: Jun 21, 2026

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Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Human Brain Anatomy

Background:

  • Minicolumns are fundamental units of the cerebral cortex, believed to form via radial neuronal migration.
  • Previous research presumed minicolumns to be uniformly single-cell wide due to their migratory origins.

Purpose of the Study:

  • To quantitatively measure the width of minicolumnar cores in different cortical layers.
  • To investigate potential laminar differences in minicolumn structure.

Main Methods:

  • Analysis of postmortem human brain tissue from 9 areas in 7 individuals.
  • Celloidin embedding and Nissl staining for tissue preparation.
  • Advanced digital image analysis using denoising, region growing, and recursive line tracing algorithms.

Main Results:

  • Significant differences were observed in minicolumnar core widths between supra- and infra-granular cortical layers.
  • Quantitative data provides a novel insight into the structural heterogeneity of cortical minicolumns.

Conclusions:

  • The study demonstrates that minicolumnar core width is not uniform across cortical layers.
  • These laminar differences may be explained by developmental processes during corticogenesis, suggesting a more complex structure than previously assumed.