piriform cortex

Preferred Label : piriform cortex;

Uberon definition : the subdivision of the laminated olfactory cortex with only three main layers that receive monosynaptic input from the olfactory bulb via the lateral olfactory tract; it is located bilaterally in the ventrolateral forebrain and is commonly divided into anterior and posterior regions;

Uberon synonym : primary olfactory areas;

Uberon related term : pyriform lobe; piriform lobe; primary olfactory cortex; paleopallium; olfactory pallium; piriform area; pyriform cortex;

Uberon Taxon note : Piriform cortical regions are present in the brains of amphibians, reptiles and mammals. The piriform cortex is among three areas that emerge in the telencephalon of amphibians, situated caudally to a dorsal area, which is caudal to a hippocampal area. Farther along the phylogenic timeline, the telencephalic bulb of reptiles as viewed in a cross section of the transverse plane extends with the archipallial hippocampus folding toward the midline and down as the dorsal area begins to form a recognizable cortex. As mammalian cerebrums developed, volume of the dorsal cortex increased in slightly greater proportion, as compared proportionally with increased overall brain volume, until it enveloped the hippocampal regions. Recognized as neopallium or neocortex, enlarged dorsal areas envelop the paleopallial piriform cortex in humans and Old World monkeys. Among taxonomic groupings of mammals, the piriform cortex and the olfactory bulb become proportionally smaller in the brains of phylogenically younger species. The piriform cortex occupies a greater proportion of the overall brain and of the telencephalic brains of insectivores than in primates. The piriform cortex continues to occupy a consistent albeit small and declining proportion of the increasingly large telencephalon in the most recent primate species while the volume of the olfactory bulb becomes less in proportion;

Details

Origin ID

0004725;

UMLS CUI

C0228280;

Automatic exact mappings (from CISMeF team)
- Piriform Cortex [MeSH concept]
- Piriform Cortex [MeSH Descriptor]
Semantic type(s)
- Body Part, Organ, or Organ Component [UMLS semantic type]
UMLS correspondences (same concept)
- Piriform Cortex [MeSH concept]
- Piriform Cortex [MeSH Descriptor]
- Prepyriform area [FMA entity]
- Structure of lateral olfactory gyrus (body structure) [SNOMED CT concept]
- lateral olfactory gyrus [SNOMED Notion]
Uberon cross reference
- Entire piriform area (body structure) [SNOMED CT concept]
contributes to morphology of
- olfactory cortex [UBERON concept]
has part
- entorhinal cortex [UBERON concept]
- piriform cortex layer 1 [UBERON concept]
- piriform cortex layer 2 [UBERON concept]
- piriform cortex layer 3 [UBERON concept]
part of
- olfactory cortex [UBERON concept]

Keyword's position in hierarchy(ies) :

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