DiffusionDiffusion Magnetic Resonance ImagingDiffusion Tensor ImagingAnisotropyExtracellular SpaceNerve Fibers, MyelinatedNeuronsBrainNeurons, AfferentMotor NeuronsAction PotentialsModels, BiologicalTime FactorsCells, CulturedElectrophysiologyHippocampusMembrane PotentialsCalciumSynapsesModels, NeurologicalAxonsMicroscopy, ElectronSynaptic TransmissionElectric StimulationFacilitated DiffusionComputer SimulationPotassiumPatch-Clamp TechniquesDopaminergic NeuronsCerebral CortexRats, WistarKineticsGlutamic AcidDendritesSpinal CordCell MembraneNeurogliaImmunohistochemistryMicroelectrodesAlgorithmsNerve Tissue ProteinsBiological TransportRats, Sprague-DawleyGABAergic NeuronsAnimals, NewbornExtracellular FluidAstrocytesgamma-Aminobutyric AcidFluorescent DyesImage Processing, Computer-AssistedGanglia, SpinalCatsSensory Receptor CellsPyramidal CellsOlfactory Receptor NeuronsPhotobleachingMice, Inbred C57BLDopamineInulinSodiumCholinergic NeuronsNeural InhibitionMathematicsSignal TransductionDextransExcitatory Postsynaptic PotentialsGreen Fluorescent ProteinsCell Membrane PermeabilityMotor Neuron DiseaseMagnetic Resonance ImagingReproducibility of ResultsMicroscopy, FluorescenceNeurons, EfferentLanthanumMolecular Sequence DataIntracellular FluidMicroscopy, ConfocalNeocortexCell CountMice, TransgenicDose-Response Relationship, DrugMice, KnockoutSucroseHydrogen-Ion ConcentrationOsmolar ConcentrationMedulla OblongataCerebellumAnalysis of VarianceAquaporin 4Electric ConductivityMesencephalonWaterInterneuronsCalcium SignalingNeuropeptidesRabbitsNerve NetMicrodialysisModels, TheoreticalCentral Nervous System