Enteric Nervous SystemNeuronsMyenteric PlexusNeurons, AfferentSubmucous PlexusMotor NeuronsNitrergic NeuronsGastrointestinal MotilityNeurogliaHirschsprung DiseaseProto-Oncogene Proteins c-retDigestive SystemAction PotentialsCalbindin 2Glial Cell Line-Derived Neurotrophic Factor ReceptorsNeural CrestGastrointestinal TractColonNerve Tissue ProteinsGuinea PigsGlial Cell Line-Derived Neurotrophic FactorIleumGlucagon-Like Peptide 2Nerve Growth FactorsSensory Receptor CellsImmunohistochemistryPurinergic P2X Receptor AgonistsCells, CulturedGangliaAutonomic DenervationElectric StimulationTetrodotoxinUbiquitin ThiolesteraseNeurturinSynaptic TransmissionSerotoninTyrosine 3-MonooxygenaseIntestinesIntestine, SmallS100 Calcium Binding Protein GEndothelin-3Rats, Sprague-DawleyDendritesNitric Oxide Synthase Type IDopaminergic NeuronsSpinal CordSynapsesNADH Tetrazolium ReductaseCell CountGanglia, SpinalNeurogenesisCholine O-AcetyltransferaseElectrophysiologyGrowth ConesMice, TransgenicVasoactive Intestinal PeptideHippocampusGene Expression Regulation, DevelopmentalPatch-Clamp TechniquesGABAergic NeuronsReceptor, Nerve Growth FactorHu Paraneoplastic Encephalomyelitis AntigensMice, KnockoutNerve RegenerationOrgan Culture TechniquesMice, Inbred C57BLOlfactory Receptor NeuronsCerebral CortexVagus NerveIntestinal Pseudo-ObstructionAxonal TransportCell DifferentiationHexamethoniumSubstance PTime FactorsMembrane PotentialsMuscle, SmoothAnimals, NewbornIn Situ HybridizationAxonsgamma-Aminobutyric AcidReceptor Protein-Tyrosine KinasesModels, NeurologicalNeural InhibitionNeurons, EfferentSignal TransductionNeuritesZebrafishGastrointestinal TransitCholinergic NeuronsInterneuronsCatsCalciumPyramidal CellsGlial Fibrillary Acidic ProteinPeristalsisBrainMotor Neuron DiseaseRNA, MessengerMesencephalon