abnormal floor plate morphology MP:0000925 MPheno.ontology abnormal floorplate morphology any structural anomaly of the specialized glial structure (non-neuronal cells) situated at the ventral midline of the embryonic neural tube; this structure spans the anteroposterior axis from the midbrain to the tail regions, separating the left and right basal plates of the developing neural tube, and serves as an organizer to ventralize tissues in the embryo as well as to guide neuronal positioning and differentiation along the dorsoventral axis of the neural tube floor plate abnormalities floor plate dysplasia abnormal neural tube morphology/development