Hippocampus
Hippocampus
Definition
The hippocampus is a structure of the limbic part of the rhinencephalon, involved in memory formation and spatial orientation. It is composed of three parts:
Precommissural part: located rostral to the corpus callosum and merging with the paraterminal gyrus.
Supracommissural part: forms a thin gray band around the corpus callosum, including the geniculate gyrus, supracallosal gyrus, and indusium griseum.
Retrocommissural part: constitutes the main archicortical complex of the hippocampus proper and the subiculum, also called the hippocampal formation.
It is named the hippocampus due to its tight coiling around the corpus callosum, reminiscent of the seahorse. Its arrangement is the same in domestic mammals and humans.
References
Barone R, Bortolami R. Anatomie comparée des mammifères domestiques, Tome 6, Neurologie I, Vigot, Paris, 2004.
Evans HE, de Lahunta A. Miller’s anatomy of the dog, 4th edition, Elsevier Saunders, St Louis, 2012.
