Spinal CordPainSpinal Cord InjuriesInjectionsPain ManagementChronic PainInjections, SpinalPain ThresholdPain MeasurementPain, PostoperativeBack PainLow Back PainSpinal NervesAnesthesia, SpinalPain, IntractableSpinal Cord DiseasesNeck PainSpinal Nerve RootsAbdominal PainSpinal DiseasesSpinal CanalSpinal Cord NeoplasmsSpinal Cord CompressionPain PerceptionSpinal NeoplasmsPelvic PainFacial PainInjections, IntramuscularInjections, IntravenousSpinal StenosisAcute PainSpinal FusionPain, ReferredInjections, Intra-ArticularInjections, SubcutaneousNeuralgiaAnalgesicsHyperalgesiaShoulder PainRats, Sprague-DawleyInjections, IntralesionalGanglia, SpinalSpinal InjuriesMuscular Atrophy, SpinalMusculoskeletal PainInjections, EpiduralTime FactorsSpinal Cord IschemiaInjections, IntraperitonealSpineLumbosacral RegionAnalgesics, OpioidPosterior Horn CellsMotor NeuronsThoracic VertebraeDisease Models, AnimalNociceptorsAnesthetics, LocalNociceptive PainTreatment OutcomeParaplegiaCervical VertebraeLaminectomyInjections, IntraventricularTuberculosis, SpinalInjections, IntradermalSpinal CurvaturesHematoma, Epidural, SpinalChronic DiseaseLumbar VertebraeInjections, Intra-ArterialAnalgesiaSpinal FracturesMorphineDose-Response Relationship, DrugManipulation, SpinalRecovery of FunctionLidocaineSpinal Muscular Atrophies of ChildhoodIntravitreal InjectionsVisceral PainMagnetic Resonance ImagingInjections, JetNeuronsMyofascial Pain SyndromesEpidural SpaceTrigeminal Nucleus, SpinalRats, WistarInjections, IntraocularSpinal Cord RegenerationBehavior, AnimalComplex Regional Pain SyndromesArthralgiaRadiculopathyMicroinjectionsElectric StimulationAfferent PathwaysLocomotionBupivacaineQuadriplegia