Hippocampus proper
| Region I of hippocampus proper | |
|---|---|
 Diagram of hippocampal regions in a rat brain. | |
.png) 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 I; regio I cornus ammonis; CA1 |
| NeuroNames | 182 |
| TA98 | A14.1.09.327 |
| TA2 | 5520 |
| FMA | 62493 |
| Anatomical terms of neuroanatomy | |
The hippocampus proper refers to the actual structure of the hippocampus which is made up of four regions or subfields. The subfields CA1, CA2, CA3, and CA4 use the intials of Cornu Ammonis, an earlier name of the hippocampus.
CA1 is the first region in the hippocampal circuit, from which a major output pathway goes to layer V of the entorhinal cortex. Another significant output is to the subiculum.