The neural tube is divided into. We borrow the first part of Hesiod's Theogony to name it. Chaos is at the floor, while Aether at the roof. Gaia is the basal plate above the floor, while Uranus the sky god is the alar plate below the roof.
Chaos (Floor plate)
Aether (Roof plate)
Gaia (Basal plate)
Uranus (Alar plate)
Dorsoventral patterning
