AxonsGrowth ConesNerve RegenerationDecapodiformesAxonal TransportNeuronsMotor NeuronsMyelin SheathOptic NerveNerve Tissue ProteinsSpinal CordRetinal Ganglion CellsDendritesSchwann CellsOptic ChiasmNeural ConductionSemaphorinsWallerian DegenerationSemaphorin-3ANeuritesNeurons, AfferentCentral Nervous SystemGanglia, SpinalSynapsesPeripheral NervesSuperior ColliculiNerve Growth FactorsRetinaAction PotentialsNerve Fibers, MyelinatedGAP-43 ProteinSensory Receptor CellsAxotomyNeurogliaGene Expression Regulation, DevelopmentalRanvier's NodesVisual PathwaysMicroscopy, ElectronPresynaptic TerminalsHorseradish PeroxidaseNerve CrushChick EmbryoAnimals, Genetically ModifiedCells, CulturedNervous SystemImmunohistochemistryNerve DegenerationRats, Sprague-Dawley