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Related Experiment Videos

Complete flatmounting of the macaque cerebral cortex.

Lawrence C Sincich1, Daniel L Adams, Jonathan C Horton

  • 1Beckman Vision Center, University of California-San Francisco, San Francisco 94143-0730, USA.

Visual Neuroscience
|April 20, 2004
PubMed
Summary

This study presents a flat-mounting atlas for macaque cerebral cortex, enabling detailed mapping of brain areas and connections. This method overcomes folding challenges, offering a simplified approach for primate brain research.

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Area of Science:

  • Neuroscience
  • Primate Brain Anatomy
  • Cortical Mapping

Background:

  • Brain surface folding impedes cerebral cortex mapping.
  • Cortical flattening methods partially address this obstacle.
  • A detailed atlas for macaque cerebral cortex flat-mounting is needed.

Purpose of the Study:

  • To provide a step-by-step atlas for flat-mounting the entire macaque cerebral cortex.
  • To facilitate detailed mapping of cortical areas and connections.
  • To establish a routine method for primate brain research.

Main Methods:

  • Dissecting macaque cerebral cortex from white matter.
  • Unfolding and flattening the cortex in a single piece using relieving cuts.
  • Sectioning flatmounts and processing for cytochrome oxidase (CO) or myelin, and retrograde tracing.

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Main Results:

  • Demonstrated significant variation (nearly twofold) in surface area of cortical regions and the whole cortex.
  • Found strong correlations between surface areas of V1, V2, hippocampus, and total cortex.
  • Clearly visualized CO stripe patterns in V2 (26-34 cycles) and identified new V2 inputs from the occipitotemporal region.

Conclusions:

  • Flatmounting the cerebral cortex is a simple and efficient method.
  • This technique can be routinely used for mapping areas and connections in the macaque brain.
  • The macaque brain is a crucial model for understanding the human brain.