SynapsesPrefrontal CortexDendritic SpinesHelplessness, LearnedTestosterone PropionateDendritesHippocampusSpineCerebral CortexImmunological SynapsesPyramidal CellsFeminizationGonadal HormonesRats, Sprague-DawleySynaptic TransmissionNeuronsEscape ReactionCA1 Region, HippocampalPhencyclidineNeuronal PlasticityBrain MappingVisual CortexMagnetic Resonance ImagingExcitatory Postsynaptic PotentialsNeural PathwaysMotor CortexPresynaptic TerminalsSomatosensory CortexBrainOvariectomyReaction TimeElectric StimulationElectrical SynapsesNerve NetNeural InhibitionAuditory CortexReceptors, AMPAReceptors, N-Methyl-D-AspartateMicroscopy, Electron, TransmissionDihydrotestosteroneModels, NeurologicalMemoryMicroscopy, ElectronOrchiectomyImage Processing, Computer-AssistedLong-Term PotentiationGyrus CinguliAction PotentialsGlutamic AcidPsychomotor PerformanceAmygdalaPhotic StimulationPatch-Clamp TechniquesCell CountFrontal LobeSynaptic VesiclesInterneuronsFunctional LateralityAnalysis of Variancegamma-Aminobutyric AcidExcitatory Amino Acid AntagonistsDopamineNerve Tissue ProteinsCognitionAnimals, NewbornRats, Long-EvansEntorhinal CortexMemory, Short-TermNeurotransmitter AgentsTime FactorsRewardCerebellar CortexLimbic SystemBehavior, AnimalElectrophysiologyAxonsParietal LobeLong-Term Synaptic DepressionCerebellumRats, WistarSynaptic MembranesNeuropsychological TestsEvoked PotentialsEstradiolNeuromuscular JunctionCuesPurkinje CellsSchizophreniaNucleus AccumbensReceptors, GlutamateEmotionsMicrodialysisCercopithecus aethiopsSynaptophysinPost-Synaptic DensityParvalbuminsInhibitory Postsynaptic PotentialsFearLearningMice, Inbred C57BL