develops from cranial placode 颅骨板 neurogenic placode 神经源性基板 Cranial ectodermal placode with potential to develop into a component of the nervous system, such as nerves or ganglia. neurogenic placodes placodae neurogenicae 头颅外胚层基板可发展成为神经系统的组成部分，如神经或神经节。 神经原性基板 preplacodal ectoderm 前基板外胚层