Little is known about how unique features in a species can emerge along the
conserved body plan beyond species. For example, mammals, including human
beings, have acquired the neocortex with distinct function and morphology.
Here we review current topics in comparative developmental biology of verte
brate brains, especially focusing on the cerebral neocortex as a suitable m
odel for considering species-specific aspects. (C) 2001 Elsevier Science Ir
eland Ltd and the Japan Neuroscience Society. All rights reserved.