Spinal NervesSpinal Nerve RootsSpinal CordNeuralgiaPeripheral NervesSpinal Cord InjuriesPeripheral Nerve InjuriesSciatic NerveInjections, SpinalLigationPeripheral Nervous System DiseasesHyperalgesiaGanglia, SpinalNerve FibersLumbosacral RegionRats, Sprague-DawleyPainOptic NerveRadiculopathyNerve RegenerationPain ThresholdPeripheral Nervous System NeoplasmsNerve Compression SyndromesSpinal Cord NeoplasmsPain MeasurementMononeuropathiesNeuritisAxotomyPosterior Horn CellsPeripheral Nervous SystemNeurons, AfferentHyperesthesiaAnalgesicsPhysical StimulationLumbar VertebraeMotor NeuronsSpinal Cord DiseasesCyclohexanecarboxylic AcidsAxonsAnesthesia, SpinalRhizotomySciaticaNerve BlockSural NerveDisease Models, AnimalTibial NervePeripheral Nervous System AgentsNerve Fibers, MyelinatedNerve CrushMedian NerveSpinal CanalIntercostal NervesNerve EndingsLumbosacral PlexusBehavior, AnimalFacial NerveSpinal DiseasesSpinal Cord CompressionUlnar NerveNeural ConductionSciatic NeuropathySpinal NeoplasmsElectric StimulationFemoral NerveSensory Receptor CellsNociceptorsSpinal StenosisNerve Fibers, UnmyelinatedSpineSpinal FusionNerve Growth FactorsAminesThoracic VertebraeTrigeminal NervePhrenic NerveInfusions, SpinalCervical VertebraeHindlimbNerve Growth FactorWallerian DegenerationCauda EquinaAfferent PathwaysDenervationCranial NervesImmunohistochemistryMyelographyRadial NerveNerve DegenerationSpinal InjuriesMuscular Atrophy, SpinalNerve TissueDose-Response Relationship, DrugTime FactorsBrachial PlexusPeripheral Vascular DiseasesAction PotentialsLoperamideRats, WistarSpinal Cord IschemiaOphthalmic Nerve