Cervical VertebraeSpinal CordSpinal Cord CompressionSpinal OsteophytosisSpinal Cord InjuriesSpinal Cord DiseasesMagnetic Resonance ImagingSyringomyeliaMultiple Sclerosis, Chronic ProgressiveQuadriplegiaMyelographyInfarctionCervical AtlasSpinal Cord NeoplasmsNeckLaminectomySpinal Muscular Atrophies of ChildhoodPyramidal TractsSpinal InjuriesMultiple SclerosisMultiple Sclerosis, Relapsing-RemittingParalysisDecompression, SurgicalNeurologic ExaminationSpondylosisEvoked Potentials, SomatosensoryAtrophyUmbilical CordDiffusion Magnetic Resonance ImagingMedulla OblongataImage EnhancementDiaphragmUpper ExtremityNeurosurgical ProceduresElectromyographyAnisotropyBrain StemBrainDisability EvaluationImage Processing, Computer-AssistedSensitivity and SpecificityFetal BloodSpermatic CordTomography, X-Ray ComputedCord Blood Stem Cell TransplantationSpinal Cord IschemiaFollow-Up StudiesCase-Control StudiesCord FactorsVocal CordsParaplegiaSpinal Cord RegenerationMotor NeuronsNuchal CordSpinal Cord StimulationThoracic VertebraeNerve RegenerationAxonsRecovery of FunctionRats, Sprague-DawleyLumbosacral RegionLocomotionMyelitisPosterior Horn CellsInjections, SpinalInfant, NewbornCordotomyAnterior Horn CellsPregnancyNeuronsElectric Stimulation TherapyDisease Models, AnimalTime FactorsUrinary Bladder, NeurogenicPainBlood Banks