Enteric Nervous SystemHirschsprung DiseaseMyenteric PlexusSubmucous PlexusNeural CrestCentral Nervous SystemNervous SystemGastrointestinal TractCell DivisionProto-Oncogene Proteins c-retGastrointestinal MotilityDigestive SystemPeripheral Nervous SystemSOXE Transcription FactorsNeuronsEndothelin-3NeurogliaGlial Cell Line-Derived Neurotrophic FactorIntestinesGangliaColonIleumQuailGlial Cell Line-Derived Neurotrophic Factor ReceptorsImmunohistochemistryDigestive System Physiological PhenomenaMegacolonVasoactive Intestinal PeptideSerotonin 5-HT4 Receptor AgonistsIntestine, SmallCentral Nervous System DiseasesPeristalsisVagus NerveCell MovementInterstitial Cells of CajalGuinea PigsGene Expression Regulation, DevelopmentalIntestinal Pseudo-ObstructionStem CellsReceptor Protein-Tyrosine KinasesJejunumNeurofilament ProteinsHigh Mobility Group ProteinsChick EmbryoIleusCeliac PlexusIntestine, LargeNitrergic NeuronsBrainCell DifferentiationMutationIn Situ HybridizationCentral Nervous System NeoplasmsNerve Tissue ProteinsReceptors, Serotonin, 5-HT4Mice, TransgenicNeurogenesisDrosophila ProteinsNeurotransmitter AgentsCoturnixUbiquitin ThiolesteraseNerve Growth FactorsMice, Inbred C57BLSignal TransductionEmbryo, NonmammalianReceptor, Endothelin BCholine O-AcetyltransferaseAutonomic Nervous SystemManducaCell CountIntestinal MucosaCalbindin 2StomachCells, CulturedGastrointestinal DiseasesHexamethoniumNADPH DehydrogenaseZebrafishAsymmetric Cell DivisionIrritable Bowel SyndromeTetrodotoxinMolecular Sequence DataGanglia, AutonomicMuscle, SmoothSerotoninMice, Mutant StrainsGastrointestinal TransitSympathetic Nervous SystemNervous System Physiological PhenomenaTime FactorsBody PatterningMice, KnockoutPhenotypeNeurturinGastroparesisNitric Oxide Synthase Type INeuropeptidesZebrafish ProteinsRats, Sprague-DawleyEmbryo, Mammalian