Ammon's horn

A part of the brain consisting of a three layered cortex located in the forebrain bordering the medial surface of the lateral ventricle. The term hippocampus is often used synonymously with hippocampal formation which consists of the hippocampus proper or Cornu Ammonis, the dentate gyrus and the subiculum. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the Ammon's horn is

A part of the brain consisting of a three layered cortex located in the forebrain bordering the medial surface of the lateral ventricle. The term hippocampus is often used synonymously with hippocampal formation which consists of the hippocampus proper or Cornu Ammonis, the dentate gyrus and the subiculum. The atlas records it as a nerve at the organ scale in the human body.

Where the Ammon's horn is

It sits within the nervous system. Positioned deliberately as part of this species body plan.

What the Ammon's horn connects to

The atlas records 12 typed relationships for it, across 6 kinds of connection. part of hippocampal formation, limbic lobe and limbic system.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the Ammon's horn. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as Ammon's horn, ammon gyrus, ammon horn, hippocampus major, hippocampus proper and hippocampus proprius, and 4 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001954, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: hippocampal formation, limbic lobe and limbic system.
• A kind of: regional part of brain.
• contributes to morphology of: CA1 field of hippocampus, CA2 field of hippocampus, CA3 field of hippocampus and hippocampal field.
• contains: hippocampus fimbria and hippocampus stratum lacunosum moleculare.
• connects: hippocampal commissure.
• surrounded by: parahippocampal gyrus.

Questions

Where is the Ammon's horn?

It sits within the nervous system. Positioned deliberately as part of this species body plan.

What does the Ammon's horn connect to?

Part of: hippocampal formation, limbic lobe and limbic system.

Is the Ammon's horn the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.