Enteric Nervous SystemNeurogliaHirschsprung DiseaseMyenteric PlexusSubmucous PlexusMosaic VirusesCentral Nervous SystemNeural CrestNervous SystemProto-Oncogene Proteins c-retGastrointestinal TractNeuronsTobacco Mosaic VirusGastrointestinal MotilityPeripheral Nervous SystemGlial Cell Line-Derived Neurotrophic Factor ReceptorsDigestive SystemSOXE Transcription FactorsGlial Cell Line-Derived Neurotrophic FactorEndothelin-3GangliaImmunohistochemistryIntestinesMosaicismColonQuailBrainIleumNerve Tissue ProteinsNerve Growth FactorsCell MovementCentral Nervous System DiseasesVasoactive Intestinal PeptideGene Expression Regulation, DevelopmentalDigestive System Physiological PhenomenaStem CellsMegacolonSerotonin 5-HT4 Receptor AgonistsIntestine, SmallPeristalsisReceptor Protein-Tyrosine KinasesCell DifferentiationNeurofilament ProteinsCells, CulturedGuinea PigsVagus NerveInterstitial Cells of CajalIn Situ HybridizationAstrocytesMice, TransgenicChick EmbryoDrosophila ProteinsIntestinal Pseudo-ObstructionMolecular Sequence DataNeurogenesisNeurturinHigh Mobility Group ProteinsMice, Inbred C57BLRats, Sprague-DawleyCell CountJejunumAlfalfa mosaic virusNeurotransmitter AgentsIleusCeliac PlexusMutationIntestine, LargeNitrergic NeuronsRNA, MessengerCentral Nervous System NeoplasmsCoturnixSignal TransductionCucumovirusUbiquitin ThiolesteraseGlial Fibrillary Acidic ProteinDisease Models, AnimalNeuropeptidesAnimals, NewbornRetinaReceptors, Serotonin, 5-HT4ManducaMice, KnockoutOligodendrogliaAxonsZebrafishTobaccoCholine O-AcetyltransferaseTetrodotoxinMice, Mutant StrainsCell LineageSpinal CordReceptor, Endothelin BEmbryo, NonmammalianSerotoninTime FactorsGanglia, AutonomicAutonomic Nervous SystemPhenotypeEmbryo, MammalianGastrointestinal Transit