An Experimental Myelographic Study of the Lumbar Spine at L5-S1 on the Pathological Behavior of Lumbar Disc Herniation and on Thickening of the Yellow Ligament with Reference to Spinal Canal Stenosis

Abstract

Using Y. Mori's procedure (1981), the author performed an experimental study of myelography of the lumbar spine at L₅-S₁. The normal lumbo-sacral spine of a human cadaver was sectioned in a coronal plane passing the pedicles and devided it into the two parts. The anterior part was a vertebral body and the posterior part was a laminar portion. The intradural space was filled with a physiologic saline solution and about 3 ml of myodil as a contrast medium was introduced in it, then the dural sac was closed with a clamp at its top. A series of experiments were then performed by narrowing the space of the spinal canal under the following conditions.