The term cortical subplate nuclei refers to one of two parts of the pallium in the Functional CNS Model - Rat. It is a set of endbrain structures defined on the basis of common embryologic origin from the cortical subplate of the Encephalon. The subplate nuclei include the claustrum, the lateral amygdalar nucleus, the basal nucleus of the amygdala, the accessory basal nucleus of the amygdala, the periamygdalar cortex, the dorsal cap of the nucleus of the olfactory tract and, in the rat perhaps, layer 6b of the neocortex. The other part of the pallium is the cerebral cortex ( Swanson-2004 ).