SyringomyeliaArnold-Chiari MalformationArachnoiditisPlatybasiaForamen MagnumMuscle WeaknessDecompressive CraniectomyCerebrospinal Fluid PressureEncephaloceleArachnoid CystsFourth VentricleMyelographySubarachnoid SpaceCranial Fossa, PosteriorMagnetic Resonance ImagingDecompression, SurgicalLaminectomyBirth InjuriesScoliosisArachnoidCerebrospinal FluidHydrocephalusSpinal CordArthropathy, NeurogenicDura MaterReflex, AbdominalCerebrospinal Fluid ShuntsSpinal Cord NeoplasmsHypesthesiaCerebellar DiseasesHypohidrosisSpinal Cord Injuries