DiffusionDiffusion Magnetic Resonance ImagingDiffusion Tensor ImagingAnisotropyExtracellular SpaceNerve Fibers, MyelinatedBrainNeurogliaModels, BiologicalFacilitated DiffusionMicroscopy, ElectronTime FactorsComputer SimulationPotassiumKineticsNeuronsCell MembraneBiological TransportAlgorithmsExtracellular FluidCalciumInulinGlial Cell Line-Derived Neurotrophic FactorPhotobleachingImage Processing, Computer-AssistedAquaporin 4Rats, Sprague-DawleyCells, CulturedMathematicsCell Membrane PermeabilityMagnetic Resonance ImagingGlutamic AcidLanthanumReproducibility of ResultsDextransSodiumFluorescent DyesRats, WistarImmunohistochemistryWaterMicroelectrodesAmino Acid Transport System X-AGMembrane PotentialsSucroseIntracellular FluidModels, NeurologicalAxonsOsmolar ConcentrationHydrogen-Ion ConcentrationMicroscopy, FluorescenceImage Interpretation, Computer-AssistedModels, TheoreticalBody WaterCerebral CortexRetinaRabbitsMolecular Sequence DataMannitolHippocampusBiological Transport, ActiveSecretory PathwayCrystallizationImage EnhancementThuliumTemperatureMicrodialysisFluorescence Recovery After PhotobleachingAstrocytesMagnetic Resonance SpectroscopyDiffusion of InnovationCentral Nervous SystemIntercellular JunctionsNeurilemmaCytoplasmElectroosmosisNerve Tissue ProteinsImaging, Three-DimensionalPermeabilitySensitivity and SpecificityElectrophysiologyCorpus CallosumExosomesMice, Inbred C57BLSynapsesAnimals, NewbornAmino Acid SequenceOsmosisSpinal CordBrain NeoplasmsProtein TransportQuaternary Ammonium CompoundsModels, MolecularCell CommunicationDisk Diffusion Antimicrobial TestsMembrane ProteinsEpidural SpaceSynaptic TransmissionModels, ChemicalAdenosine TriphosphateExocytosis