The hippocampus is a conglomerate structure in the ventro-caudo-medial aspect of the cerebral hemisphere. It consists of Ammon's horn and the dentate gyrus, and has a cortical laminar structure distinctly different from the the neocortex.
The hippocampal structures are presumed to play a role in memory consolidation.

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Below are a list of the components of the hippocampus:

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• Entorhinal cortex
  

• Presubiculum
  

• Subiculum
  

• Prosubiculum
  

• CA1
  

• CA2
  

• CA3
  

• CA4
  

• Dentate gyrus
  

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The relatively limited extent of the hippocampus may be appreciated by inspection of the array of sections presented below:

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