NeurulationNeural TubeNeural Tube DefectsNeural CrestNervous SystemSpinal DysraphismNeural PlateAnencephalyGene Expression Regulation, DevelopmentalCentral Nervous SystemBody PatterningEmbryo, MammalianNotochordMorphogenesisEctodermChick EmbryoXenopus ProteinsCell PolarityIn Situ HybridizationEmbryonic DevelopmentEmbryo, NonmammalianPaired Box Transcription FactorsEmbryo LossTeratogensRhombencephalonEmbryonic and Fetal DevelopmentXenopus laevisMesodermXenopusMice, Mutant StrainsMesencephalonPregnancyFolic AcidHomeodomain ProteinsTranscription FactorsGastrulaNerve Tissue ProteinsEmbryo Culture TechniquesHedgehog ProteinsSkullGenes, LethalSomitesSignal TransductionBone Morphogenetic ProteinsWnt ProteinsWnt Signaling PathwayMutationCell MovementSpinal CordMice, Inbred C57BLCoturnixEmbryonic InductionProsencephalonQuailMolecular Sequence DataMice, KnockoutCell DifferentiationPhenotypeMice, TransgenicPollen TubeWound Closure TechniquesDNA-Binding ProteinsMeningomyeloceleZebrafish ProteinsZebrafishNeuroepithelial CellsAmino Acid SequenceMembrane ProteinsBrainCytoskeletonCrosses, GeneticGastrulationNeuronsChordataAdaptor Proteins, Signal TransducingAvian ProteinsReceptors, G-Protein-CoupledImmunohistochemistryTailSpina Bifida OccultaHealth Facility ClosureAmbystoma mexicanumApoptosisCulture TechniquesMicroscopy, Electron, ScanningTime FactorsAmbystomaEpithelial CellsUrochordataFallopian TubesAllelesGenotypeEctogenesisSeptal Occluder DeviceModels, BiologicalEncephaloceleHeadHeart Septal Defects, AtrialEustachian TubeFetal Proteins