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| Archicortex | |
|---|---|
.png) The archicortex in humans is a synonym of the hippocampal formation. The hippocampal formation is shown here, as drawn by Santiago Ramon y Cajal: DG: dentate gyrus. Sub: subiculum. EC: entorhinal cortex. CA1-CA3: hippocampus proper | |
| Details | |
| Part of | cerebral cortex or pallium |
| System | Olfactory system |
| Identifiers | |
| Latin | archicortex |
| NeuroNames | 170 |
| NeuroLex ID | birnlex_715 |
| TA98 | A14.1.09.302 |
| TA2 | 5530 |
| TE | E5.14.3.4.3.1.31 E5.14.3.4.3.1.32, E5.14.3.4.3.1.31 |
| FMA | 62424 |
| Anatomical terms of neuroanatomy | |
The archicortex, or archipallium, is the phylogenetically oldest region of the brain's cerebral cortex (the second oldest is the paleocortex). It is often considered contiguous with the olfactory cortex, but its extent varies among species. In older species, such as fish, the archipallium makes up most of the cerebrum. Amphibians develop an archipallium and paleopallium.
In humans, the archicortex makes up the three cortical layers of the hippocampus.[1] It has fewer cortical layers than both the neocortex, which has six, and the paleocortex, which has either four or five. The archicortex, along with the paleocortex and periallocortex, is a subtype of allocortex.[2] Because the number of cortical layers that make up a type of cortical tissue seems to be directly proportional[clarification needed] to both the information-processing capabilities of that tissue and its phylogenetic age, the archicortex is thought to be the oldest and most basic type of cortical tissue.[3]
- ^ Purves, Dale (2012). Neuroscience (5th ed.). Sunderland, Mass. p. 731. ISBN 9780878936953.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ "Paleocortex". BrainInfo. University of Washington. Retrieved 5 May 2013.
- ^ Purves, Dale; Augustine, George J; Fitzpatrick, David; Hall, William C; LaMantia, Anthony-Samuel; White, Leonard E (2011). Neuroscience (5th ed.). Sinauer Associates Inc. ISBN 9780878936465.