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The function of the piriform cortex relates to olfaction, which is the perception of smells. Sometimes called the olfactory cortex, olfactory lobe or paleopallium, 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 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 paleopallialIn anatomy of animals, the paleopallium is a region within the telencephalon in brain. see also List of regions in the human brain Cerebrum. piriform cortex in humanHuman beings are defined variously in biological, spiritual, and cultural terms, or in combinations thereof. Biologically, they are classified as Homo sapiens ( Latin for knowing man , a primate species of mammal with a highly developed brain. In spirituas and Old World monkeyCercopithecinae 11 genera Colobinae 9 genera The Old World monkeys or Cercopithecidae are a group of primates, falling in the superfamily Cercopithecoidea in the clade Catarrhini. From the point of view of superficial appearance, they are unlike apes in ts.

Among taxonomic groupingsScientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. Modern classification has its roots in the system of Carolus Linnaeus, who grouped species according to shared ph of mammals, the piriform cortex and the olfactory bulbThe olfactory bulb is a part of the brain that is a distinct outgrowth from the forebrain of mammals. As one might guess from the name, it plays a major role in olfaction, which is the perception of smells. In terms of evolution, the olfactory bulb arises 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 insectivoreAny organism with a diet that consists chiefly of insects and similar small creatures is an insectivore . Although individually small, insects exist in enormous numbers and make up a very large part of the animal biomass in almost all non-marine environmes 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.

See also: Regions in the human brain