hippocampus - BrainInfo

hippocampus (HPP)

The term hippocampus (HPP) refers to a composite substructure of the limbic lobe defined on the basis of dissection and internal structure. It is a C-shaped structure circling the interbrain (IBR) and corpus callosum (cc) in humans, macaque, rat and mouse. It is synonymous with archicortex ( Stephan-1975 ). From 1995 to 2025, the NeuroNames Standard term for the structure was 'archicortex' ( Bowden-1995 ). During a thorough review of NeuroNames three decades later, it was found that the use of the term 'hippocampus' in English publications had risen from ~50 times that of 'archicortex' to ~1000 times more frequent than 'archicortex ( Ngram ). A major consideration in selecting standard terms is familiarity as measured by frequency of use. Thus, in 2025, the NeuroNames Standard was changed to 'hippocampus'. In the humans ( Mai-1997 ) and, the macaque ( Paxinos-2009a ) the HPP consists of the hippocampal complex (HPC), which lies horizontal deep to the parahippocampal gyrus (PHG) of the limbic lobe (LLB). It narrows posteriorly to become the fasciolar gyrus (FSG), which curves around the splenium of the corpus callosum (scc) and narrows further to become the very thin supracallosal gyrus (SCG). The SCG continues on the dorsal surface of the body of the corpus callosum (bcc) and ventrally around the genu of the corpus callosum (gcc) to become the paraterminal gyrus ( Stephan-1975 ). In humans, the HPP constitutes 3.5% of the surface area of the cerebral cortex (CCX) ( Zilles-1990 ). In the rodent, the substructures are the same except that the subiculum (SUB), a key component of the HPC in the primate, is not assigned to the otherwise HPC equivalent in the rodent, the hippocampal region (HIP) ( Functional CNS Model - Rat ( Swanson-2004 ). Instead it is considered part of the retrohippocampal region (RHP). Also, the FSG, SCG and PTG equivalents, are not topologically separate structures in the rodent but are embedded successively in the RHP, retrosplenial area (RSP), anterior cingulate cortex (ACC), and cerebral cortex (CCX) abutting the septal nuclei (SPN) (Swanson-2004 ). Updated 21 Jul 2026.

Also known as: archicortex, Archeocortex, Archaeocortex, archipallium, Hippocampus of Schiebler, intralimbic gyrus, seahorse, Hippocampus, Hippocampus of Stephan, hippocampus

NeuroNames ID: 170

All Names & Sources

1 of 21

Showing 21 synonym(s) - Use arrows to navigate

Showing 21 synonym(s)

Name:

ARC

Language:

acronym

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

Name:

arkikorteks

Language:

Indonesian

Organism:

human

Source:

Noback-1982

Citation:

Jakarta: Penerbit Buku Kedokteran EGC, 1982

Source Title:

Anatomi Susunan Saraf Manusia, Prinsip-Prinsip Dasar Neurobiologi

Name:

архикортекс

Language:

Russian

Organism:

human

Source:

Savel'ev-1996

Citation:

AREA XVII, Moscow, 1996.

Source Title:

Stereoskopicheskii Atlas Mozga Cheloveka

Name:

arquipalio

Language:

Spanish

Organism:

human

Source:

Carpenter-1994

Citation:

edicion 4, Williams & Wilkins, Baltimore; traducción de Editorial Medica Panamericana, Buenos Aires, efectuada por el Dr. Alejandro Kaufman

Source Title:

Neuroanatomía Fundamentos

Name:

archipallium

Language:

Indonesian

Organism:

human

Source:

Noback-1982

Citation:

Jakarta: Penerbit Buku Kedokteran EGC, 1982

Source Title:

Anatomi Susunan Saraf Manusia, Prinsip-Prinsip Dasar Neurobiologi

Name:

archicortex

Language:

English

Organism:

human

Source:

Carpenter-1983

Citation:

Baltimore: Williams and Wilkins Co., 1983

Source Title:

Human Neuroanatomy

Name:

archicortex

Language:

English

Organism:

Macaca fascicularis

Source:

Martin-1997

Citation:

Primate Information Center, University of Washington, Seattle, 1997.

Source Title:

Template Atlas of the Primate Brain

Name:

Archeocortex

Language:

Latin

Organism:

human

Source:

Nomina-1983

Citation:

Fifth Edition, Williams and Wilkins Co., Baltimore, 1983

Source Title:

Nomina Anatomica

Name:

Archaeocortex

Language:

Latin

Organism:

human

Source:

Nomina-1983

Citation:

Fifth Edition, Williams and Wilkins Co., Baltimore, 1983

Source Title:

Nomina Anatomica

Name:

archipallium

Language:

English

Organism:

human

Source:

Carpenter-1983

Citation:

Baltimore: Williams and Wilkins Co., 1983

Source Title:

Human Neuroanatomy

Name:

archicortex

Language:

Indonesian

Organism:

human

Source:

Noback-1982

Citation:

Jakarta: Penerbit Buku Kedokteran EGC, 1982

Source Title:

Anatomi Susunan Saraf Manusia, Prinsip-Prinsip Dasar Neurobiologi

Name:

древняя кора

Language:

Russian

Organism:

human

Source:

Savel'ev-1996

Citation:

AREA XVII, Moscow, 1996.

Source Title:

Stereoskopicheskii Atlas Mozga Cheloveka

Name:

старая кора

Language:

Russian

Organism:

human

Source:

Baev-2000

Citation:

Moskva: Meditsina, 2000.

Source Title:

Magnitno-Resonansnaia Tomografiia Golovnogo Mozga: Normal'naia Anatomiia

Name:

archipallio

Language:

Italian

Organism:

human

Source:

Carpenter-1995

Citation:

EdiSes, s.r.l.- Napoli, 1995

Source Title:

Fondamenti di Neuroanatomia

Name:

Hippocampus of Schiebler

Language:

Latin

Organism:

human

Source:

Schiebler-1999

Citation:

Eighth Edition, Springer Verlag, Berlin, 1999.

Source Title:

Anatomie

Name:

intralimbic gyrus

Language:

English

Organism:

human

Source:

Hesselink-2011

Citation:

UCSD Neuroradiology: Teaching File Database

Source Title:

The Temporal Lobe & Limbic System

Name:

seahorse

Language:

English

Organism:

human

Source:

Wikipedia-2024a

Citation:

Source Title:

Lamina terminalis

Name:

seahorse

Language:

English

Organism:

human

Source:

Shaw-1997

Citation:

Neuroimaging Clinics of North America. 1997; 7:1:101-142

Source Title:

Neuropathology of the limbic system

Name:

Hippocampus

Language:

Latin

Organism:

Unspecified

Source:

Stefanacci-1996

Citation:

J Comp Neurol 1996 Nov 25;375(4):552-82

Source Title:

Organization of connections between the amygdaloid complex and the perirhinal and parahippocampal cortices in macaque monkeys.

Name:

Hippocampus of Stephan

Language:

Latin

Organism:

Unspecified

Source:

Stephan-1975

Citation:

In Handbuch der mikroskopischen Anatomie des Menschen (W. Bargmann, Ed.), Vol. 4, Part 9, 998pp. Springer-Verlag, Berlin and New York.

Source Title:

Allocortex

Name:

hippocampus

Language:

English

Organism:

Unspecified

Source:

Stephan-1970

Citation:

Chapter 5, pp. 289-297 in Advances in Primatology, C.R. Noback and W. Montagna (eds.), (Appleton Century Croft; New York)

Source Title:

The allocortex in primates

Illustrations

Showing 2 illustration(s)

labeled line drawings of
sagittal section in
Macaca fascicularis

multiple views of
3D reconstruction in
Macaca mulatta

Species With The Structure

Equivalent By	Human	Macaque	Rat	Mouse
Topology	Has The Structure	Has The Structure	Has The Structure	Has The Structure

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Showing 9 record(s) - Use arrows to navigate

Showing 9 record(s)

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Archaeocortex

Source:

Nomina-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Archeocortex

Source:

Nomina-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

archicortex

Source:

Carpenter-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

archipallium

Source:

Carpenter-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Hippocampus of Schiebler

Source:

Schiebler-1999

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

intralimbic gyrus

Source:

Hesselink-2011

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca fascicularis (Macaca fascicularis)

Their Name:

archicortex

Source:

Martin-1997

Basis:

Topology

Has Equivalent:

Yes

Organism:

Rattus (rat)

Their Name:

archicortex

Source:

NeuroNames

Basis:

Topology

Has Equivalent:

Yes

Organism:

Mus (mouse)

Their Name:

archicortex

Source:

NeuroNames

Models Where It Appears

Structural CNS Model - Macaque

Brain structures of the macaque are illustrated in BrainInfo’s NeuroMaps macaque brain atlas. Structures are grouped by proximity in a hierarchy corresponding to the central nervous system hierarchy of NeuroNames ( Bowden-1995 Martin-2000 ). Structures in the NeuroMaps atlas are based on the segmentation of an MRI of the brain of a 3-year old male rhesus macaque (Macaca mulatta). The atlas is most useful for targeting structures for implantating electrodes and chemtrodes. Updated 29 Oct 2025.

brain

forebrain

interbrain

hippocampal fissure (hippocampal sulcus)

telodiencephalic fissure

midbrain

hindbrain

choroidal fissure