Spinal Cord InjuriesSpinal CordQuadriplegiaParaplegiaCervical VertebraeChronic DiseaseSpasmWheelchairsMuscle SpasticityUrinary Bladder, NeurogenicSpinal Cord DiseasesRecovery of FunctionElectromyographySpinal Cord CompressionMotor NeuronsElectric Stimulation TherapySpinal Cord NeoplasmsUrinary BladderReflexRats, Sprague-DawleyThoracic VertebraeAnterior Horn CellsSpinal CanalParalysisElectric StimulationMyelitisExercise TherapySpinal InjuriesCordotomyInjections, SpinalContusionsLaminectomyPhrenic NerveSpinal Nerve RootsNerve RegenerationWalkingSpinal Cord IschemiaForelimbLocomotionMuscle, SkeletalAutonomic DysreflexiaDisease Models, AnimalUrinationMyelographySpinal Cord RegenerationPyramidal TractsAxonsTime FactorsRespiratory ParalysisNeckMagnetic Resonance ImagingNeck InjuriesCross-Sectional StudiesSpinal Cord StimulationSpinal DiseasesMotor ActivitySpinal NervesWounds and InjuriesInjury Severity ScoreReflex, AbnormalLumbosacral RegionRed NucleusSpondylosisCatsSpinal StenosisNeuronal PlasticityChondroitin ABC LyaseSpinal NeoplasmsAfferent PathwaysPosterior Horn CellsNeuronsNerve TissuePainHindlimbKlippel-Feil SyndromeDecerebrate StateSpineMuscle ContractionSyringomyeliaSacrumNeuronal Tract-TracersDecompression, SurgicalNeurologic ExaminationAnesthesia, SpinalPressure UlcerNeuralgiaEfferent PathwaysBrain InjuriesSpinal FusionOligodendrogliaArmEcho-Planar ImagingBrain StemGanglia, SpinalNerve Fibers, MyelinatedUmbilical CordPostureTreatment OutcomeElectrodes, ImplantedMedulla Oblongata