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Spinal Stenosis

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SPINAL STENOSIS

INTRODUCTORY HUMAN ANATOMY

11/19/2010

Spinal stenosis is a term used to describe a narrowing of the spinal canal. First stenosis means choking or closing in. the purpose of this information is to help understand the anatomy of the spine related to spinal stenosis the signs and symptoms of spinal stenosis. This problem is more common in adults over 50 years old and 60 years old. However it can occur in younger people who have abnormally small spine canals do to birth defect. According to anatomy &physiology the spinal cord lies within the vertebral canal, where the vertebrae offer protection. In addition, the spinal cord is encircled by three connective tissue coverings called meninges (p.483). The spinal cord is part of the central nervous system (CNS) which extends caudally and is protected by the bony structures of the vertebral column. It is covered by three membranes of the CNS the Dura mater, arachnoids and innermost pia mater (p484). The spinal cord has three basic functions to control certain repetitive functions (e.g. walking), conduct impulses to /from brain and spinal nerves and coordinate spinal reflexes. Spinal stenosis describes a condition in which the nerves in the spinal canal are closed in, or compressed. The spinal canal is the hallow vertical hole formed by the bones of the spinal column. The journal of the American medical association says spinal stenosis is used to describe a narrowing of the spinal canal, which contains the spinal cord and emerging nerve roots, which can occur in any portion of the spine (JAMA February 27, 2008-vol 299, no 8) because of limited space, changes in the bone (vertebral bodies) or soft tissues (spinal ligaments) can result in compression of the affected spinal cord and blood vessels (JAMA Feb 27, 2008-vol 299 no 8). This narrowing can be congenital (genetic) or acquired (arthritis,

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