SyringomyeliaSpinal CordArnold-Chiari MalformationSpinal Cord InjuriesArachnoiditisPlatybasiaForamen MagnumDecompressive CraniectomySpinal Cord DiseasesSpinal Cord NeoplasmsSpinal Cord CompressionCerebrospinal Fluid PressureEncephaloceleArachnoid CystsMyelographyFourth VentricleLaminectomySubarachnoid SpaceMagnetic Resonance ImagingDecompression, SurgicalCranial Fossa, PosteriorParaplegiaSpinal CanalScoliosisSpinal Cord IschemiaArachnoidCervical VertebraeCerebrospinal FluidBirth InjuriesDura MaterHydrocephalusThoracic VertebraeInjections, SpinalArthropathy, NeurogenicSpinal InjuriesReflex, AbdominalHypesthesiaCerebrospinal Fluid ShuntsSpinal Nerve RootsNeurologic ExaminationCerebellar DiseasesSpinal NervesHypohidrosisMotor Neurons