NeuronsNeurogliaNeurons, AfferentMotor NeuronsGlial Cell Line-Derived Neurotrophic Factor ReceptorsNerve Tissue ProteinsCells, CulturedAstrocytesAxonsAction PotentialsBrainNerve Growth FactorsImmunohistochemistrySpinal CordCerebral CortexDopaminergic NeuronsHippocampusGanglia, SpinalAnimals, NewbornCentral Nervous SystemGlial Fibrillary Acidic ProteinSynapsesPatch-Clamp TechniquesRetinaElectrophysiologySynaptic TransmissionSensory Receptor CellsGlial Cell Line-Derived Neurotrophic FactorGABAergic NeuronsNeuropeptidesCell DifferentiationGlutamic AcidMembrane PotentialsDendritesRats, Sprague-DawleyElectric StimulationOligodendrogliaRats, Wistargamma-Aminobutyric AcidCell CountOlfactory Receptor NeuronsMesencephalonCerebellumDopamineGliosisMice, TransgenicMice, Inbred C57BLTime FactorsModels, NeurologicalNeurogenesisProto-Oncogene Proteins c-retNeural InhibitionSubstantia NigraEnteric Nervous SystemCholinergic NeuronsNerve DegenerationGene Expression Regulation, DevelopmentalStem CellsNeuritesDrosophila ProteinsLeechesMotor Neuron DiseaseGlial Cell Line-Derived Neurotrophic FactorsPyramidal CellsNeurons, EfferentSchwann CellsExcitatory Postsynaptic PotentialsGreen Fluorescent ProteinsIn Situ HybridizationInterneuronsRNA, MessengerNeocortexMice, KnockoutDisease Models, AnimalTyrosine 3-MonooxygenaseRetinal NeuronsCell SurvivalProsencephalonCalciumGangliaNervous SystemNerve RegenerationMedulla OblongataCorpus StriatumCatsBrain StemNeurturinTetrodotoxinNeuroprotective AgentsAnimals, Genetically ModifiedNeuronal PlasticityCell DeathTrigeminal GanglionSignal TransductionNeural Stem CellsPeripheral Nervous SystemDrosophilaNestinBehavior, AnimalSerotonergic Neurons