abnormal embryonic neuroepithelium primary cilium morphology decreased embryonic neuroepithelium primary cilium number MPheno.ontology decreased neural tube cilium number MP:0013214 decreased embryonic neural ectoderm cilium number decreased embryonic neuroectoderm cilium number reduced number of the primary non-motile microtubule-based structures of the embryonic neuroepithelium which are typically short and straight, project apically into the neural tube lumen, and play an essential role in Sonic hedgehog (Shh) signalling and neural tube patterning