Morphology of lumbar vertebra ligamentum flavum and its anatomical relationship with surrounding structures
Objective To investigate the morphology of lumbar vertebra ligamentum flavum and its anatomi-cal relationship with surrounding structures.Methods The ligamentum vertebra ligamentum flavum in one continu-ous lumbar transverse section specimen with a thickness of 0.2 cm,three lumbar transverse sections with a thick-ness of 1.0 cm and one lumbar sagittal section specimen with a thickness of 2.0 cm were observed for the study.The posterior wall of the lumbar spinal canal was dissected on 10 human specimens(4 males and 6 females)to ob-serve the morphology of lumbar vertebra ligamentum flavum and its relationship with surrounding structures.Re-sults All 15 specimens(100%)showed that the lateral end of the lumbar vertebra ligamentum flavum covered all of the posterior wall of the intervertebral foramen,and its superior edge anterior was adjacent to the spinal nerve.The lateral ligamentum flavum of the posterior wall of the spinal canal covered the capsulae articularis,and the me-dial ligamenta flavum was attached to the adjacent laminae.The upper margin was attached to the middle part of the upper vertebral arch plate,and the lower margin was attached to the upper margin of the lower vertebral arch plate.Loose connective tissue or gaps could be observed between the lumbar vertebra ligamentum flavum and the articular process capsule,upper vertebral arch plate and interspinous ligament in 6 specimens(40%).Conclusion The ligamentum flavum is closely related to the anteroposterior diameter of the foramen intervertebrale.The retro-dural space behind the ligamentum flavum may provides potential connection between the bilateral facet joints.
lumbar vertebraligamentum flavumintervertebral foramenfacet jointthe retrodural space of Okada
NETL
NSTL
万方数据
