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Updated: Sep 17, 2025
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Preparation of Parasagittal Slices for the Investigation of Dorsal-ventral Organization of the Rodent Medial Entorhinal Cortex
Published on: March 28, 2012
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Lateral Thinking: Exploring the Lateral Entorhinal Cortex Projections to the Hippocampus in the Rodent Brain
Rebecca Przy1, Mira M M Wade1,2, Priscilla G Welter3
1Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada.
The Journal of Comparative Neurology
|July 1, 2025
Summary
The lateral entorhinal cortex (LEC) pathway to the hippocampus (HC) is crucial for cognition. Understanding its layer-specific anatomy is key to studying aging and neurodegenerative diseases.
Area of Science:
- Neuroscience
- Neuroanatomy
Background:
- The lateral entorhinal cortex (LEC) pathway to the hippocampus (HC) is vital for cognitive functions.
- Alterations in this pathway are linked to cognitive decline in aging and neurodegenerative diseases.
Purpose of the Study:
- To provide a detailed anatomical description of the LEC-to-hippocampus pathway.
- To review existing neuroanatomical data on this pathway.
Main Methods:
- Review of neuroanatomical tract tracing studies.
- Analysis of projection patterns from the LEC to the HC.
Main Results:
- LEC projections to the HC are layer-specific: Layer II to the dentate gyrus (DG), Layer III to the subiculum and cornu Ammonis (CA).
- Projections terminate in the molecular layers of the HC.
- A topographical organization exists along the dorsolateral-ventromedial axis.
Conclusions:
- A comprehensive understanding of LEC-to-HC anatomy is fundamental for research into its cognitive functions.
- This anatomical knowledge is essential for investigating disease-related and age-related alterations in the pathway.
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