AbscessSpinal Cord DiseasesViridans StreptococciSpinal CordSpinal Cord InjuriesBrain AbscessLiver AbscessAbdominal AbscessLung AbscessEpidural AbscessSpinal Cord CompressionSpinal Cord NeoplasmsPsoas AbscessLiver Abscess, AmebicSpinal Cord IschemiaLiver Abscess, PyogenicInjections, SpinalParaplegiaSpinal Nerve RootsSpinal NervesPeriapical AbscessRetropharyngeal AbscessMotor NeuronsSpinal Cord RegenerationSpinal CanalCervical VertebraeSpinal DiseasesPeritonsillar AbscessQuadriplegiaSpinal NeoplasmsThoracic VertebraeAnesthesia, SpinalLaminectomyUmbilical CordPosterior Horn CellsRats, Sprague-DawleyLumbosacral RegionDrainageRecovery of FunctionNerve RegenerationAxonsSpinal StenosisSpinal FusionGanglia, SpinalSpinal Cord StimulationMyelitisLocomotionSpinal InjuriesSubphrenic AbscessPeriodontal AbscessAnterior Horn CellsCordotomy