Optic Nerve NeoplasmsOptic NerveSpinal CordCranial Nerve NeoplasmsSpinal Cord InjuriesOptic Nerve InjuriesOptic DiskOptic Nerve DiseasesSpinal Cord DiseasesOptic NeuritisOptic ChiasmSpinal Cord NeoplasmsSpinal Cord CompressionOptic AtrophyNerve FibersNerve RegenerationSciatic NerveAxonsRetinal Ganglion CellsNerve CrushSpinal NervesSpinal Cord IschemiaPeripheral NervesSpinal Nerve RootsInjections, SpinalOptic Nerve GliomaOptic Neuropathy, IschemicParaplegiaMotor NeuronsRetinaIntraocular PressureGlaucomaRats, Sprague-DawleyMyelin SheathSpinal Cord RegenerationSpinal NeoplasmsDisease Models, AnimalSpinal CanalPapilledemaPeripheral Nerve InjuriesCervical VertebraeAnesthesia, SpinalQuadriplegiaImmunohistochemistryTibial NerveNerve DegenerationThoracic VertebraeOptic Lobe, NonmammalianGanglia, SpinalNerve BlockSpinal DiseasesNerve Growth FactorsNerve EndingsOptic Atrophies, HereditaryAxonal TransportPosterior Horn CellsSural NerveElectric StimulationOptic FlowNeurogliaUmbilical CordRecovery of FunctionNerve Compression Syndromes