Enteric Nervous SystemNeurogliaHirschsprung DiseaseMyenteric PlexusSubmucous PlexusCentral Nervous SystemNeural CrestNervous SystemProto-Oncogene Proteins c-retGastrointestinal TractNeuronsGastrointestinal MotilityPeripheral Nervous SystemGlial Cell Line-Derived Neurotrophic Factor ReceptorsDigestive SystemSOXE Transcription FactorsGlial Cell Line-Derived Neurotrophic FactorEndothelin-3GangliaImmunohistochemistryIntestinesColonQuailIleumBrainNerve Growth FactorsNerve Tissue ProteinsCell MovementCentral Nervous System DiseasesVasoactive Intestinal PeptideDigestive System Physiological PhenomenaMegacolonStem CellsSerotonin 5-HT4 Receptor AgonistsIntestine, SmallGene Expression Regulation, DevelopmentalPeristalsisNeurofilament ProteinsReceptor Protein-Tyrosine KinasesGuinea PigsVagus NerveCell DifferentiationCells, CulturedInterstitial Cells of CajalAstrocytesChick EmbryoIntestinal Pseudo-ObstructionIn Situ HybridizationMice, TransgenicNeurturinNeurogenesisHigh Mobility Group ProteinsDrosophila ProteinsRats, Sprague-DawleyMice, Inbred C57BLJejunumCell CountNeurotransmitter AgentsIleusCeliac PlexusIntestine, LargeNitrergic NeuronsCentral Nervous System NeoplasmsCoturnixUbiquitin ThiolesteraseGlial Fibrillary Acidic ProteinNeuropeptidesDisease Models, AnimalAnimals, NewbornReceptors, Serotonin, 5-HT4ManducaOligodendrogliaSignal TransductionMice, KnockoutRNA, MessengerAxonsCholine O-AcetyltransferaseTetrodotoxinSpinal CordRetinaMice, Mutant StrainsReceptor, Endothelin BSerotoninZebrafishGanglia, AutonomicAutonomic Nervous SystemGastrointestinal TransitNervous System Physiological PhenomenaCalbindin 2Intestinal MucosaCell LineageGastrointestinal DiseasesHexamethoniumNADPH DehydrogenaseTime FactorsSympathetic Nervous SystemStomachTyrosine 3-MonooxygenaseEmbryo, MammalianIrritable Bowel Syndrome