Action Potentials/drug effects; Carrier Proteins/metabolism; Excitatory Postsynaptic Potentials/drug effects; Glutamic Acid/pharmacology; Neurons/physiology; Receptors, Metabotropic Glutamate/metabolism; Synapses/drug effects; Animals; Animals, Newborn; Aspartic Acid/pharmacology; Biophysics; Carrier Proteins/genetics; Cerebellum/cytology; Dose-Response Relationship, Drug; Electric Stimulation; Excitatory Amino Acid Agents/pharmacology; Excitatory Postsynaptic Potentials/physiology; Green Fluorescent Proteins/genetics; Green Fluorescent Proteins/metabolism; Homer Scaffolding Proteins; Humans; In Vitro Techniques; Luminescent Proteins/genetics; Microscopy, Electron, Transmission; Models, Neurological; Monte Carlo Method; Neurons/drug effects; Neurons/ultrastructure; Patch-Clamp Techniques; Quinoxalines/pharmacology; RNA, Small Interfering/genetics; Rats; Receptors, Metabotropic Glutamate/genetics; Statistics, Nonparametric; Synapses/genetics; Synapses/metabolism; Synapsins/genetics; Synapsins/metabolism; Transfection/methods; Red Fluorescent Protein