Neuronal PlasticityNeural InhibitionLong-Term PotentiationSynapsesHippocampusSynaptic TransmissionNeuronsExcitatory Postsynaptic PotentialsLong-Term Synaptic DepressionLearningDominance, OcularDendritic SpinesReceptors, N-Methyl-D-AspartateElectric StimulationCritical Period (Psychology)Receptors, AMPAMemoryDendritesModels, NeurologicalAdaptation, PhysiologicalRats, Sprague-Dawley