Dendritic SpinesSpineDendritesSynapsesHippocampusNeuronal PlasticityNeuronsPyramidal CellsSilver StainingReceptors, N-Methyl-D-AspartateReceptors, AMPACA1 Region, HippocampalPost-Synaptic DensityNerve Tissue ProteinsLong-Term PotentiationMicroscopy, ConfocalExcitatory Postsynaptic PotentialsCervical VertebraeGreen Fluorescent ProteinsSynaptic TransmissionLumbar VertebraeGuanylate KinaseRats, Sprague-DawleyCells, CulturedSpinal DiseasesCell Surface ExtensionsActinsPseudopodiaOrgan Culture TechniquesCerebral CortexMicrofilament ProteinsPresynaptic TerminalsSpinal InjuriesReceptors, GlutamatePurkinje CellsCalcium-Calmodulin-Dependent Protein Kinase Type 2Microscopy, Fluorescence, MultiphotonMice, Inbred C57BLBrain-Derived Neurotrophic FactorThoracic VertebraeReceptors, Eph FamilyEndoplasmic Reticulum, SmoothCell ShapeMice, TransgenicModels, NeurologicalFragile X Mental Retardation ProteinAnimals, NewbornLuminescent ProteinsGuanine Nucleotide Exchange FactorsBiolisticsMicroscopy, ElectronSomatosensory CortexExcitatory Amino Acid AntagonistsFragile X SyndromeMice, KnockoutEmbryo, MammalianMicroscopy, ImmunoelectronGlutamic AcidDentate GyrusSpinal FusionNeurogenesisSynaptophysinBrainActin Depolymerizing FactorsNeuropilReceptor, EphB2Intracellular Signaling Peptides and ProteinsNeocortexPatch-Clamp TechniquesPrefrontal CortexAnalysis of VarianceMaze LearningSynaptic MembranesReceptor, EphA4Fluorescence Recovery After PhotobleachingMemoryCytoskeletonMembrane Proteinsrac1 GTP-Binding ProteinChimerin 1LearningImmunohistochemistrySpinal FracturesSpinal NeoplasmsSyndecan-2CortactinAxonsSignal TransductionGTPase-Activating ProteinsN-MethylaspartateProtein TransportTime FactorsCalcium SignalingNucleus AccumbensImage CytometryTransfectionBone DensityVesicular Glutamate Transport Protein 1Long-Term Synaptic DepressionRats, Wistar