Region II of hippocampus proper

Region II of hippocampus proper
Diagram of hippocampal regions in a rat brain.
Basic circuit of the hippocampus, shown using a modified drawing by Ramon y Cajal. DG: dentate gyrus. Sub: subiculum. EC: entorhinal cortex
Details
Identifiers
Latin	regio hippocampi proprii II; regio II cornus ammonis; CA2
NeuroNames	hier-166
TA	A14.1.09.329
FMA	72044
*Anatomical terms of neuroanatomy* [edit on Wikidata]

Region II of hippocampus proper (CA2) is a portion of the hippocampal formation. CA stands for the latin cornus ammonis.

Region CA2 is a small region located between CA3 and CA1. Anatomically, in the rat, it is best defined as the strip of cells that receive perforant path input from EC layer II but do not receive mossy fiber connections from DG. Its pyramidal cells are more similar to those in CA3 than those in CA1, so it is grouped as a separate region. Due to its small size, it is often ignored in discussions of the hippocampus, but its high resistance to epileptic damage makes it notable.

Additional images

Hippocampus

Rostral basal ganglia of the human brain and associated structures

Basal ganglia

Grey matter

Corpus striatum	Dorsal striatum Putamen Caudate nucleus Ventral striatum Nucleus accumbens Olfactory tubercle Globus pallidus GPe GPi

Other	Amygdala Claustrum

White matter

Semioval center

Internal capsule

Corona radiata

Rhinencephalon

Grey matter	Anterior olfactory nucleus Anterior perforated substance Olfactory bulb

White matter	Olfactory tract Medial olfactory stria Lateral olfactory stria Olfactory trigone

Other basal forebrain

Grey matter	Substantia innominata Basal optic nucleus of Meynert Nucleus of diagonal band

White matter	Diagonal band of Broca Stria terminalis

Archicortex:
Hippocampal formation/
Hippocampus anatomy

Grey matter	Hippocampus proper CA1 CA2 CA3 CA4 Dentate gyrus Fascia dentata Subiculum

White matter	Alveus Fimbria Perforant path Schaffer collateral

This article is issued from Wikipedia - version of the Friday, December 12, 2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.