Lumbar spinal stenosis (LSS) is a common spinal condi-tion and the most frequent indication for spinal surgery in elderly people. Lumbar Stenosis • Central canal stenosis: 9Narrowing of the AP dimension of the spinal canal. Stenosis in the spine is the narrow-ing of the bony canal that surrounds the nerves. Spinal stenosis causes back pain and leg pain. This is a medical condition which usually occurs due to age-related changes and this may decrease the size of the canal. Lateral lumbar spinal canal stenosis:classification, pathologic anatomy and surgical decompression. 1997 Volvo Award winner in clinical studies. However, the narrowing may progress to cause squeezing (compression) of the spinal nerves or compression of the spine. The prevalence of LSS is estimated to be 9% in the general population and up to 47% in people older than 60 years [1]. 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. 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 When the narrowing happens in the lower part of your back, it is called lumbar stenosis. 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. Stenosis in the lumbar spine may be diagnosed if degenerative changes have narrowed the bony openings of the spine and affected the nervous tissues, such as the spinal nerves, spinal cord, and/or the cauda equina. The central spinal canal is rounded and occupied by the thecal sac. The spinal canal (central stenosis) 2. LSS may occur on a congenital narrow lumbar canal or may result from degenerative processes. The lumbar spinal canal consists of a central part, two lateral parts and a posterior part corresponding to the interlaminar angle. Spinal stenosis is a term used to describe a narrowing of the spinal canal. Most often it occurs when you walk. Stenosis of the central portion is almost always associated with stenosis of the lateral corners of the spinal canal reverse may not be true. It may result from trauma or as a normal part of aging. This disorder usually involves the narrowing of one or two areas of the spine: 1. This may put pressure on the nerves and can cause pain, numbness, or weakness in your buttocks, legs, or feet. Lumbar canal stenosis, the most common form of spinal stenosis, causes neurogenic intermittent claudication and radiculopathy, and these symptoms dominate the clinical presentation. 1 Rationale for spinal fusion in lumbar spinal stenosis . Thickening of the spinal ligaments inside the vertebral canal, leading to compressive forces on the spinal cord and spinal nerves. 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 intervertebral foramen (lateral stenosis) 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 narrowing may not cause any symptoms. 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