has part has part immediately deep to develops from develops from pyramidal neuron layer of neocortex cortical plate cortical layer II cortical layer III external pyramidal cell layer external pyramidal layer of neocortex external pyramidal layer of cerebral cortex EMAPA:35257 layer of medium-sized and large pyramidal cells cerebral cortex, layer 3 lamina pyramidalis externa isocorticis [lamina iii] external pyramidal layer of isocortex [layer iii] neocortex layer 3 layer 3 of neocortex ABA:CTX3 external pyramidal cell layer of neocortex isocortex, deep supragranular pyramidal layer pyramidal layer MA:0000899 neuronames:2448 neocortex external pyramidal cell layer UBERON:0005392 NLXANAT:090809 layer III of neocortex Layer of neocortex lying deep to the external granule cell layer defined cytoarchitecturally by numerous small pyramidal neurons. PBA:294021824 UMLS:C1517046 NCIT:C32571 FMA:77810 lamina pyramidalis externa neocortex layer III