INFLUENCE OF FLEXION-EXTENSION MOTION OF LUMBAR SPINE ON LUMBOSACRAL DURAL SAC ?AN EXPERIMENTAL STUDY / 第二军医大学学报

In order to analyse the effects of flexion-extension motion of lumbar spine on the position and shape of lumbosacral dural sac, measurements were performed on 10 flexion/extension lateral myelograms of cadaver specimens of normal lumbar spine.It could be seen that from flexion to extension both sagittal diameter and length of the dural sac increased significantly, the dural sac moved caudally, and the sagittal diameter of the anterior epidural space decreased in the mid-vertebral level but increased in the inter vertebral level.The dynamic changes of the dural sac, the influence factors and the clinical relevances were discussed.