Neck MusclesSpinal NervesSpinal Nerve RootsSpinal CordNeuralgiaSpinal Cord InjuriesInjections, SpinalPeripheral Nerve InjuriesSciatic NerveLigationPeripheral NervesHyperalgesiaNerve FibersGanglia, SpinalLumbosacral RegionPeripheral Nervous System DiseasesRats, Sprague-DawleyPainOptic NerveRadiculopathyPain ThresholdSpinal Cord NeoplasmsNerve Compression SyndromesNerve RegenerationMononeuropathiesPain MeasurementPosterior Horn CellsNeuritisAxotomyPeripheral Nervous System NeoplasmsHyperesthesiaPhysical StimulationNeurons, AfferentLumbar VertebraeAnalgesicsSpinal Cord DiseasesCyclohexanecarboxylic AcidsAnesthesia, SpinalMotor NeuronsRhizotomySciaticaNerve BlockPeripheral Nervous System AgentsSpinal CanalIntercostal NervesAxonsNerve Fibers, MyelinatedNerve EndingsSural NerveTibial NerveDisease Models, AnimalLumbosacral PlexusMedian NerveSpinal DiseasesSpinal Cord CompressionNerve CrushFacial NerveSpinal NeoplasmsBehavior, AnimalUlnar NerveSpinal StenosisFemoral NerveSciatic NeuropathyElectric StimulationSpinal FusionSpine