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Updated: Aug 10, 2026
08:49
Visualization of Cortical Modules in Flattened Mammalian Cortices
Published on: January 22, 2018
Cingulate cortex of the rhesus monkey: II. Cortical afferents
The Journal of Comparative Neurology
|August 8, 1987
Summary
This study maps brain connections in rhesus monkeys, detailing cortical projections to the cingulate cortex subdivisions. Findings reveal specific frontal, temporal, and parietal areas connect to distinct cingulate regions, aiding understanding of brain circuitry.
Area of Science:
- Neuroscience
- Primate Brain Anatomy
- Cortical Connectivity
Background:
- The cingulate cortex plays a crucial role in cognition and emotion.
- Understanding its intricate cortical projections is essential for deciphering brain function.
Purpose of the Study:
- To comprehensively map the cortical projections to subdivisions of the cingulate cortex in the rhesus monkey.
- To utilize an expanded cytoarchitectural scheme for precise localization of inputs.
Main Methods:
- Horseradish peroxidase (HPP) and tritiated amino acid tracers were employed.
- Analysis was performed using an expanded cytoarchitectural map of the cingulate cortex (areas 24a-c, 23a-c).
Main Results:
- Specific frontal lobe areas (e.g., 46, 9, 11, 14) project to area 25.
- Cingulate areas 24a, 24b, and 24c receive diverse inputs from frontal, temporal, and parietal cortices.
- Posterior cingulate cortex (areas 29, 30) shows reciprocal connections with frontal and parietal regions.
Conclusions:
- Cortical projections to the cingulate cortex are highly organized and topographically specific.
- The findings provide a detailed map of corticocortical connections within the primate cingulate cortex.
- This detailed mapping advances our understanding of the neural circuitry underlying complex brain functions.
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