1. Typically, the phylogenetically older parts of the cerebral cortex. 2. More specifically, the cortex forming the hippocampus. SEE ALSO: allocortex, cerebral cortex. SYN: archipallium. [archi- + L. cortex]
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ar·chi·cor·tex (ahr″kĭ-korґteks) [TA] the portion of the cerebral cortex that, with the paleocortex, develops in association with the olfactory system, and which is phylogenetically older than the neocortex and lacks its layered structure. The embryonic archicortex corresponds to the cortex of the dentate gyrus and hippocampus in mature mammals. Called also archaeocortex or archeocortex, archipallium, and olfactory cortex.Medical dictionary. 2011.