The lumbar canal stenosis is a condition which indicates the narrowing of your spinal canal or the tunnels through which your nerves and other body parts communicate with the canal. The spinal canal (central stenosis) 2. SPINAL ( CANAL ) STENOSIS Overview of Spinal Stenosis Spinal stenosis is a narrowing of spaces in the spine that results in pressure on the spinal cord and/ or nerve roots. Most often it occurs when you walk. This is a medical condition which usually occurs due to age-related changes and this may decrease the size of the canal. Lumbar Stenosis • Central canal stenosis: 9Narrowing of the AP dimension of the spinal canal. It may result from trauma or as a normal part of aging. Stenosis in the spine is the narrow-ing of the bony canal that surrounds the nerves. Thickening of the spinal ligaments inside the vertebral canal, leading to compressive forces on the spinal cord and spinal nerves. Lumbar canal stenosis, the most common form of spinal stenosis, causes neurogenic intermittent claudication and radiculopathy, and these symptoms dominate the clinical presentation. Stenosis of the central portion is almost always associated with stenosis of the lateral corners of the spinal canal reverse may not be true. 1997 Volvo Award winner in clinical studies. LSS may occur on a congenital narrow lumbar canal or may result from degenerative processes. Spinal stenosis is a term used to describe a narrowing of the spinal canal. Lateral lumbar spinal canal stenosis:classification, pathologic anatomy and surgical decompression. This may put pressure on the nerves and can cause pain, numbness, or weakness in your buttocks, legs, or feet. The reduction in canal size may cause local neural compression and/or compromise of the blood supply to the cauda equina ... Microsoft PowerPoint - Spinal Stenosis.ppt Author: fuer03 Rationale for spinal fusion in lumbar spinal stenosis . Lumbar spinal stenosis (LSS) is a medical condition in which the spinal canal narrows and compresses the nerves and blood vessels at the level of the lumbar vertebrae.Spinal stenosis may also affect the cervical or thoracic region, in which case it is known as cervical spinal stenosis or thoracic spinal stenosis. The narrowing may not cause any symptoms. The prevalence of LSS is estimated to be 9% in the general population and up to 47% in people older than 60 years [1]. The lumbar spinal canal consists of a central part, two lateral parts and a posterior part corresponding to the interlaminar angle. The central spinal canal is rounded and occupied by the thecal sac. Central stenosis involves narrowing of the spinal canal around the thecal sac containing the cauda equina, and occurs as a result of the facet joint arthrosis and hypertrophy, thickening and bulging of the ligamentum flavum, bulging of the intervertebral disc, or spondylolisthesis. 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