Enteric Nervous SystemHirschsprung DiseaseMyenteric PlexusSubmucous PlexusNeural CrestCentral Nervous SystemNervous SystemGastrointestinal TractProto-Oncogene Proteins c-retGastrointestinal MotilityNeuronsDigestive SystemPeripheral Nervous SystemSOXE Transcription FactorsParvalbuminsEndothelin-3NeurogliaGangliaCalbindin 2Glial Cell Line-Derived Neurotrophic FactorIntestinesgamma-Aminobutyric AcidImmunohistochemistryColonNeural InhibitionIleumGlial Cell Line-Derived Neurotrophic Factor ReceptorsQuailVasoactive Intestinal PeptideCell MovementSynaptic TransmissionMice, TransgenicDigestive System Physiological PhenomenaMegacolonSerotonin 5-HT4 Receptor AgonistsGene Expression Regulation, DevelopmentalIntestine, SmallNerve Tissue ProteinsPeristalsisCentral Nervous System DiseasesElectric StimulationGuinea PigsCholine O-AcetyltransferaseAction PotentialsSpinal CordMotor NeuronsNeurogenesisVagus NerveRats, Sprague-DawleyInterstitial Cells of CajalNeocortexGABAergic NeuronsStem CellsMice, Inbred C57BLIntestinal Pseudo-ObstructionSynapsesNeurotransmitter AgentsChick EmbryoPyramidal CellsTetrodotoxinBrainElectrophysiologyInhibitory Postsynaptic PotentialsAnimals, NewbornIn Situ HybridizationHippocampusCell CountGlutamate DecarboxylaseNeurofilament ProteinsJejunumReceptor Protein-Tyrosine KinasesExcitatory Postsynaptic PotentialsCell DifferentiationHigh Mobility Group ProteinsSerotoninNerve NetS100 Calcium Binding Protein GPatch-Clamp TechniquesIleusGanglia, InvertebrateCeliac PlexusIntestine, LargeNitrergic NeuronsCentral Nervous System NeoplasmsDendritesMice, KnockoutNerve Growth FactorsAxonsHomeodomain ProteinsReceptors, Serotonin, 5-HT4Organ Culture TechniquesMice, Mutant StrainsNeural PathwaysNeuropeptidesSignal TransductionCoturnixUbiquitin ThiolesteraseNervous System Physiological PhenomenaEmbryo, MammalianNADPH Dehydrogenase