endopiriform nucleus (EPN)

The term endopiriform nucleus refers to a component of olfactory cortex defined by histology in the human ( Yilmazer-Hanke-2012 ), macaque ( Paxinos-2009a ), rat ( Swanson-2004 ) and mouse ( Hof-2000 ). Based on cytology, layered structure and connectivity, it is classified as olfactory cortex. In the rat and mouse it has two parts: the dorsal endopiriform nucleus and th ventral endopiriform nucleus. Located between the external capsule medially and piriform cortex ventrolaterally, it is classified as part of the basolateral nuclear group of the amygdala ( Yilmazer-Hanke-2012 ) and as one of the cortical subplate nuclei ( Swanson-2004 ). Little is known of its function ( Yilmazer-Hanke-2012 ) . Updated 18 Jun 2024..

Also known as: claustral amygdaloid area, ventral claustrum, ventral portion of claustrum, claustrum diffusa, claustrum parvum, claustral amygdalar area, endopiriform nucleus, endopiriform claustrum, amygdalaclaustral area, preamygdalar claustrum, dorsal preamygdalar claustrum

NeuroNames ID: 251

All Names & Sources

Showing 16 synonym(s)

Name:

ClA

Language:

acronym

Organism:

macaque

Source:

Martin-2000

Citation:

Elsevier, Amsterdam, 2000

Source Title:

Primate Brain Maps: Structure Of The Macaque Brain

Name:

claustral amygdaloid area

Language:

English

Organism:

Unspecified

Citation:

NeuroNames is used as a term's source if no published source of the term has been found. In most cases, the term is an English translation of a commonly used Latin term. In some cases it is a Latin translation of an English term for which no published Latin equivalent has been found.

Source Title:

Name:

ventral claustrum

Language:

English

Organism:

human

Source:

Crosby-1962

Citation:

New York: MacMillan, 1962

Source Title:

Correlative Anatomy of the Nervous System

Name:

ventral portion of claustrum

Language:

English

Organism:

human

Source:

Crosby-1962

Citation:

New York: MacMillan, 1962

Source Title:

Correlative Anatomy of the Nervous System

Name:

claustrum diffusa

Language:

English

Organism:

human

Source:

Crosby-1962

Citation:

New York: MacMillan, 1962

Source Title:

Correlative Anatomy of the Nervous System

Name:

claustrum parvum

Language:

English

Organism:

human

Source:

Crosby-1962

Citation:

New York: MacMillan, 1962

Source Title:

Correlative Anatomy of the Nervous System

Name:

claustral amygdalar area

Language:

English

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

Name:

endopiriform nucleus

Language:

English

Organism:

rat

Source:

Swanson-2004

Citation:

Third Edition, Elsevier Academic Press, Oxford, 2004

Source Title:

Brain Maps: Structure of the Rat Brain.

Name:

En

Language:

acronym

Organism:

human

Source:

Price-1990

Citation:

pp. 979-998 in The Human Nervous System, G. Paxinos, (Ed.), Academic Press, San Diego, 1990

Source Title:

Olfactory system

Name:

endopiriform claustrum

Language:

English

Organism:

macaque

Citation:

Amsterdam: Elsevier-Academic Press. 2009

Source Title:

The Rhesus Monkey Brain, Second Edition

Name:

EP

Language:

acronym

Organism:

rat

Source:

Swanson-2004

Citation:

Third Edition, Elsevier Academic Press, Oxford, 2004

Source Title:

Brain Maps: Structure of the Rat Brain.

Name:

EPN

Language:

acronym

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

Name:

amygdalaclaustral area

Language:

English

Organism:

human

Citation:

Chapter 22 in The Human Nervous System, Third Edition, JK Mai and G Paxinos (Eds.), pp. 401-424, Amsterdam: Elsevier.

Source Title:

Amygdala

Name:

preamygdalar claustrum

Language:

English

Organism:

human

Citation:

Chapter 22 in The Human Nervous System, Third Edition, JK Mai and G Paxinos (Eds.), pp. 401-424, Amsterdam: Elsevier.

Source Title:

Amygdala

Name:

dorsal preamygdalar claustrum

Language:

English

Organism:

macaque

Citation:

Chapter 22 in The Human Nervous System, Third Edition, JK Mai and G Paxinos (Eds.), pp. 401-424, Amsterdam: Elsevier.

Source Title:

Amygdala

Name:

EPn

Language:

acronym

Organism:

human

Citation:

Chapter 22 in The Human Nervous System, Third Edition, JK Mai and G Paxinos (Eds.), pp. 401-424, Amsterdam: Elsevier.

Source Title:

Amygdala

Species With The Structure
Equivalent By Human Macaque Rat Mouse
Topology Has The Structure Relevant Data Not Located Relevant Data Not Located Relevant Data Not Located

Showing 4 record(s)

Basis:

Topology

Has Equivalent:

Yes

Their Name:

claustrum diffusa

Source:

Crosby-1962

Basis:

Topology

Has Equivalent:

Yes

Their Name:

claustrum parvum

Source:

Crosby-1962

Basis:

Topology

Has Equivalent:

Yes

Their Name:

ventral claustrum

Source:

Crosby-1962

Basis:

Topology

Has Equivalent:

Yes

Their Name:

ventral portion of claustrum

Source:

Crosby-1962

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.

Functional CNS Model - Rat

The Functional CNS Model - Rat (FMrat) ( Swanson-2004) is one of three hierarchical models representing the internal organization of the central nervous system (CNS). The others are the Structural CNS Model - Human (SThmn) and the Functional CNS Model - Human (FMhmn). The FMrat model represents the basic organization of the mouse ( Hof-2000 AMBA-2024 ) and, presumably, other rodents. Functional CNS models differ from structural models in that structures are defined and named by connectivity rather than by proximity to other structures at the same level. Functional models are more useful for representing longitudinal components of are grouped based on information drawn from multiple neuroscientific disciplines. such as connections, neurochemical characteristics, and role in physiogical and behavioral processes. While the Functional Model was developed primarily for an atlas of the rat brain ( Swanson-2004 ), the hierarchical organization of structures is for the most part applicable to the human, macaque, mouse and other mammalian brains as well. Structures at lower levels of the Functional CNS hierarchy are largely the same as in the Classical and Developmental Models, i.e., they were originally identified by stains for gray matter (Nissl substance) and white matter (myelin). At the next higher level they are grouped into basic connectional and functional systems of the CNS, such as the subcortical sensory systems, the brainstem motor system and the behavioral state system. At the highest levels CNS structures are grouped on the basis of dissection and embryologic precursors into cerebrum ( cerebral cortex and cerebral nuclei ), cerebellum, and cerebrospinal trunk.