part of part of cerebral cortex neocortex regional part of brain allocortex One of two types of cerebral cortex defined on the basis of cytoarchitecture and fetal development. The other is neocortex. Allocortex does not pass through a prenatal phase of six-layered structure and has three or four layers in the mature brain ( Schiebler-1999 ). Allocortex has three subtypes: paleocortex, archicortex and periallocortex. This definition differs from that in some older sources, which excluded the olfactory bulb and the accessory olfactory bulb ( Carpenter-1983 ). NLX:143557 allocortex (Stephan) DHBA:10292 intercalated nucleus of the medulla transitional cortex The allocortex is composed of hippocampal and olfactory structures, which usually display three-layered organization[Brainspan] neuronames:759 nucleus intercalatus (staderini) FMA:83687 Wikipedia:Allocortex heterogenetic cortex UBERON:0014734 BAMS:All heterogenetic formations