The thin layer of gray matter on the surface of the cerebral hemisphere that develops from the telencephalon. It consists of the neocortex (6 layered cortex or isocortex), the hippocampal formation and the olfactory cortex.
Comment:
[homology-note] "Migration of neurons from the basal or striatal portions of the anterior part of the neural tube occurs to varying degrees in different vertebrate classes, but a true cerebral cortex is generally acknowledged to have made its first appearance in reptiles. The definition can be unambiguous, since 'cortex' simply implies the existence of a surface neuronal layer with an overlying 'zonal lamina' or 'molecular' layer containing dendrites and axons, which is separated from the underlying basal 'matrix' by white matter. Although reptilian cerebral cortex does indeed fulfill these conditions in certain locations, the separation from striatal structures is often indistinct, so that it may even be argued that some primitive dipnoans possess a pallium or cortex. Nevertheless, an extensive laminated layer separated by underlying white matter is well represented only in reptiles and mammals.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000722", ontology="VHOG", source="DOI:10.1111/j.1749-6632.1969.tb20437.x Kruger L, Experimental analyses of the reptilian nervous system. Annals of the New York Academy of Sciences (1969)", source="http://bgee.unil.ch/"}; [taxon-note] "hagfishes have independently evolved a highly laminated cerebral cortex, comparable in many ways to the cerebral cortex of mammals [http://icb.oxfordjournals.org/content/42/4/743]"
Synonyms:
exact_synonym:
cortex of cerebral hemisphere
related_synonym:
brain cortex; cortex cerebralis; cortex cerebri; cortical plate (CTXpl); cortical plate (areas); pallium of the brain