Longitudinal LigamentsOssification of Posterior Longitudinal LigamentLigamentsLigamentum FlavumOssification, HeterotopicSpineHyperostosis, Diffuse Idiopathic SkeletalLigaments, ArticularSpinal CordAlkaline PhosphatasePeriodontal LigamentSpinal Cord InjuriesPosterior Cruciate LigamentPatellar LigamentAnterior Cruciate Ligament ReconstructionBroad LigamentRound LigamentInjections, SpinalSpinal Cord DiseasesLateral Ligament, AnkleJoint InstabilitySpinal NervesAnesthesia, SpinalSpinal Cord CompressionSpinal DiseasesSpinal Nerve RootsSpiral Ligament of CochleaRuptureSpinal CanalSpinal Cord NeoplasmsKnee JointTendonsSpinal StenosisSpinal NeoplasmsSpinal FusionBiomechanical Phenomena