Spinal NervesSpinal Nerve RootsNeurons, AfferentSpinal CordSensory Receptor CellsNerve FibersTrigeminal NerveCalcitonin Gene-Related PeptideGanglia, SpinalDenervationAfferent PathwaysNeuralgiaAxonsSubstance PSpinal Cord InjuriesNerve Growth FactorsTrigeminal GanglionInjections, SpinalPeripheral Nerve InjuriesSciatic NerveLigationHindlimbSympathetic Nervous SystemPeripheral NervesHyperalgesiaSkinBrain-Derived Neurotrophic FactorLumbosacral RegionPeripheral Nervous System DiseasesImmunohistochemistryRats, Sprague-DawleyNerve RegenerationPainOptic NerveMotor NeuronsRadiculopathyPain ThresholdSpinal Cord NeoplasmsNerve Compression SyndromesPain MeasurementMononeuropathiesNerve EndingsPhysical StimulationAxotomyPosterior Horn CellsNeuritisPeripheral Nervous System NeoplasmsHyperesthesiaLumbar VertebraeAnalgesicsElectric StimulationSpinal Cord DiseasesRhizotomyCyclohexanecarboxylic AcidsAnesthesia, SpinalNerve BlockIntercostal NervesLumbosacral PlexusSciaticaNerve Fibers, MyelinatedTibial NerveDisease Models, AnimalNerve CrushSural NervePeripheral Nervous System AgentsSpinal CanalMedian NerveBehavior, AnimalFacial NerveUlnar NerveSpinal DiseasesSpinal Cord CompressionNeural ConductionNerve Growth FactorSpinal NeoplasmsFemoral NerveAdrenergic FibersSpinal StenosisNociceptorsOphthalmic NerveSciatic NeuropathyNerve Fibers, UnmyelinatedSpinal FusionSpineRadial NerveNeuronsPhrenic NerveCranial NervesPeripheral Nervous SystemThoracic VertebraeAminesInfusions, SpinalCervical VertebraeParasympathetic Nervous SystemNerve TissueAction PotentialsSplanchnic NervesMusclesWallerian DegenerationNerve Degeneration