Nerve DegenerationSpinal NervesOptic NerveWallerian DegenerationSpinal Nerve RootsOptic Nerve DiseasesSpinal CordRetinal Ganglion CellsNerve RegenerationAxonsDisease Models, AnimalNeuralgiaSpinal Cord InjuriesRetinal DegenerationSciatic NerveInjections, SpinalPeripheral Nerve InjuriesMacular DegenerationLigationPeripheral NervesHyperalgesiaNerve FibersGanglia, SpinalLumbosacral RegionPeripheral Nervous System DiseasesRats, Sprague-DawleyPainRadiculopathyNerve Compression SyndromesAxotomyPain ThresholdSpinal Cord NeoplasmsLumbar VertebraePain MeasurementMononeuropathiesNeuritisMotor NeuronsPosterior Horn CellsSpinal Cord DiseasesPeripheral Nervous System NeoplasmsNeurons, AfferentHyperesthesiaPhysical StimulationIntervertebral Disc DegenerationSpinal DiseasesAnalgesicsRhizotomyCyclohexanecarboxylic AcidsAnesthesia, SpinalSciaticaNerve Fibers, MyelinatedNerve CrushIntervertebral DiscSural NerveNerve BlockSpinal CanalTibial NervePeripheral Nervous System AgentsNerve EndingsIntercostal NervesBehavior, AnimalSpinal Cord CompressionMedian NerveFacial NerveLumbosacral PlexusSpinal NeoplasmsSpinal StenosisUlnar NerveSpinal FusionSciatic NeuropathyNeural ConductionSpineFemoral NerveCervical VertebraeElectric StimulationNerve Growth FactorsSensory Receptor CellsFrontotemporal Lobar DegenerationWet Macular DegenerationNerve Fibers, UnmyelinatedThoracic VertebraeImmunohistochemistryNociceptorsAminesNerve Growth FactorInfusions, SpinalIntervertebral Disc DisplacementPhrenic NerveMuscular Atrophy, SpinalTrigeminal NerveNeuronsCauda EquinaHindlimbDenervationPhotoreceptor Cells, VertebrateSpinal InjuriesRetinaCranial NervesMyelographyMagnetic Resonance Imaging