Enteric Nervous SystemHirschsprung DiseaseMyenteric PlexusSubmucous PlexusNeural CrestCentral Nervous SystemNervous SystemGastrointestinal TractProto-Oncogene Proteins c-retGastrointestinal MotilityPeripheral Nervous SystemDigestive SystemSOXE Transcription FactorsSciatic NerveEndothelin-3NeuronsPeripheral NervesNeurogliaGangliaGlial Cell Line-Derived Neurotrophic FactorIntestinesOptic NerveNerve FibersColonIleumGlial Cell Line-Derived Neurotrophic Factor ReceptorsQuailNerve Growth FactorsImmunohistochemistryNerve RegenerationVasoactive Intestinal PeptideDigestive System Physiological PhenomenaMegacolonSerotonin 5-HT4 Receptor AgonistsIntestine, SmallCentral Nervous System DiseasesPeristalsisGuinea PigsVagus NerveInterstitial Cells of CajalCell MovementNerve Tissue ProteinsIntestinal Pseudo-ObstructionNeurofilament ProteinsSympathetic Nervous SystemNerve BlockNerve EndingsSural NerveReceptor Protein-Tyrosine KinasesNerve CrushMedian NervePeripheral Nerve InjuriesJejunumChick EmbryoGene Expression Regulation, DevelopmentalFacial NerveHigh Mobility Group ProteinsTibial NerveNitrergic NeuronsCeliac PlexusIleusBrainUlnar NerveIntestine, LargeNeurotransmitter AgentsUbiquitin ThiolesteraseStem CellsCentral Nervous System NeoplasmsIn Situ HybridizationReceptors, Serotonin, 5-HT4Spinal NervesFemoral NerveCholine O-AcetyltransferaseAutonomic Nervous SystemCoturnixMice, TransgenicGanglia, AutonomicElectric StimulationTetrodotoxinRats, Sprague-DawleyNeurogenesisMice, Inbred C57BLHexamethoniumNervous System Physiological PhenomenaNerve Growth FactorMuscle, SmoothCranial NervesTrigeminal NerveReceptor, Endothelin BManducaCell DifferentiationStomachSerotoninIntestinal MucosaNADPH DehydrogenaseCalbindin 2Motor NeuronsGastrointestinal DiseasesCell CountAxons