The development of the chick embryo diencephalon and mesencephalon during the initial phases of neuroblast differentiation.
D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo; D004027:Diencephalon / Q000196:embryology*; D008636:Mesencephalon / Q000196:embryology*; D009474:Neurons / Q000196:embryology