Enteric Nervous SystemNeurogliaHirschsprung DiseaseMyenteric PlexusSubmucous PlexusCentral Nervous SystemNeural CrestNervous SystemProto-Oncogene Proteins c-retNeuronsGastrointestinal TractPeripheral Nervous SystemGastrointestinal MotilityGlial Cell Line-Derived Neurotrophic Factor ReceptorsSOXE Transcription FactorsDigestive SystemGlial Cell Line-Derived Neurotrophic FactorEndothelin-3ImmunohistochemistryGangliaIntestinesNerve Tissue ProteinsBrainQuailColonNerve Growth FactorsIleumAstrocytesCell MovementGene Expression Regulation, DevelopmentalCentral Nervous System DiseasesVasoactive Intestinal PeptideCell DifferentiationDigestive System Physiological PhenomenaMegacolonCells, CulturedStem CellsSerotonin 5-HT4 Receptor AgonistsIntestine, SmallNeurofilament ProteinsGlial Fibrillary Acidic ProteinReceptor Protein-Tyrosine KinasesPeristalsisNeurogenesisGuinea PigsIn Situ HybridizationGlia Maturation FactorChick EmbryoVagus NerveMice, TransgenicDrosophila ProteinsInterstitial Cells of CajalRats, Sprague-DawleyIntestinal Pseudo-ObstructionMice, Inbred C57BLHigh Mobility Group ProteinsNeurturinCell CountOligodendrogliaAxonsJejunumNeurotransmitter AgentsRetinaAnimals, NewbornIleusSignal TransductionDisease Models, AnimalCeliac PlexusNeuropeptidesIntestine, LargeNitrergic NeuronsMice, KnockoutCoturnixCentral Nervous System NeoplasmsSpinal CordRNA, MessengerUbiquitin ThiolesteraseManducaZebrafishCell LineageReceptors, Serotonin, 5-HT4Choline O-AcetyltransferaseMice, Mutant StrainsTetrodotoxinMyelin SheathSchwann CellsEmbryo, NonmammalianEmbryo, MammalianTime FactorsSerotoninNervous System Physiological PhenomenaReceptor, Endothelin BGliosisZebrafish ProteinsGastrointestinal TransitMutationGanglia, AutonomicAutonomic Nervous SystemTyrosine 3-MonooxygenaseNADPH Dehydrogenase