Lumbosacral RegionSacrumSpinal CordSpinal Cord InjuriesLumbosacral PlexusLumbar VertebraeThoracic VertebraeSpineBack MusclesSpinal Cord DiseasesEpidural SpaceSpinal Nerve RootsSpinal Cord CompressionSpinal Cord NeoplasmsLow Back PainTorqueBackZygapophyseal JointIntervertebral DiscScoliosisSpinal Cord IschemiaInjections, SpinalBiomechanical PhenomenaMotor NeuronsPostureCauda EquinaSpinal NervesSpinal CanalSpinal DiseasesSpinal NeoplasmsMagnetic Resonance ImagingMovementParaplegiaRadiculopathy