| Piriform Cortex |
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| cerebrum | |
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The function of the piriform cortex relates to Olfaction , which is the perception of Smell s. Sometimes called the ''olfactory cortex'', ''olfactory lobe'' or ''paleopallium'', piriform cortical regions are present in the brains of Amphibians , Reptile s and Mammal s. The piriform cortex is among three areas that emerge in the Telencephalon of amphibians, situated Caudal ly 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 mammallian 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 Human s and Old World Monkey s. 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 Insectivore s than in Primate s. 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. SEE ALSO EXTERNAL LINKS |
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