Axons/drug effects; Calcium-Calmodulin-Dependent Protein Kinase Type 2/metabolism; Glutamic Acid/pharmacology; Intercellular Signaling Peptides and Proteins/metabolism; Nerve Tissue Proteins/metabolism; Neurons/cytology; Animals; Brain/metabolism; Brain/pathology; Cell Death/drug effects; Cells, Cultured; Cerebral Cortex/cytology; Disease Models, Animal; Dizocilpine Maleate/pharmacology; Embryo, Mammalian; Enzyme Activation/drug effects; Enzyme Inhibitors/pharmacology; Excitatory Amino Acid Antagonists/pharmacology; Green Fluorescent Proteins/genetics; Infarction, Middle Cerebral Artery/pathology; Intercellular Signaling Peptides and Proteins/genetics; Mice; Mice, Inbred C57BL; Mutation/genetics; Nerve Tissue Proteins/genetics; Neurons/drug effects; Phosphorylation/drug effects; Semaphorin-3A/pharmacology; Signal Transduction/drug effects; Transfection/methods; Tubulin/metabolism