Spinal Stenosis: Neck and Back Nerve Compression
|
|
 |
Stewart G. Eidelson, MD
SpineUniverse Founder, Orthopaedic Surgeon
South Palm Orthospine Institute
Delray Beach, FL, USA
|
|
|
What is Spinal Stenosis?
A clue to answering this question is found in the meaning of each word. Spinal
refers to the spine. Stenosis is a medical term used to describe
a condition where a normal-size opening has become narrow. Spinal stenosis may
affect the cervical (neck), thoracic (chest), or lumbar (low back) spine. The
most common area affected is the lumbar spine followed by the cervical spine.
Are there particular spinal structures that are affected?
Yes. To help you to visualize what happens in spinal stenosis, we will consider
a water pipe. Over time rust and debris builds up on the walls of the pipe thereby
narrowing the passageway that normally allows water to freely flow. In the spine,
the passageways are the spinal canal and the neuroforamen. The
spinal canal is a hollow vertical hole that contains the spinal cord.
The neuroforamen are the passageways that are naturally created between
the vertebrae through which spinal nerve roots exit the spinal canal. See Figure
1.

Figure 1. The spine's bony structures encase and protect
the spinal cord. Small nerve roots shoot off from the spinal cord and exit the
spinal canal through passageways called neuroforamen.
Figure 2 is an artist's illustration of lumbar spinal stenosis. Notice the
narrowed areas in the spinal canal (reddish-colored areas). As the canal space
narrows, the spinal cord and nearby nerve roots are squeezed causing different
types of symptoms. The medical term is nerve compression.

Figure 2. Lumbar spinal stenosis.
Continue this article...
|
|
Article written
04/14/2004
Published online
04/21/2004
Last updated
08/21/2008
|
 |
|
I had a great pleasure reading Dr. Stewart Eidelson's 5-part article on spinal
stenosis. The information included in this article is accurate and informative.
I would like add a few comments for the benefit of the readers or potential
patients. First, spinal stenosis is indeed most common in the lumbar spine,
followed by the cervical spine. However, occasionally, the thoracic spine is
affected as well. Spinal stenosis in the thoracic spine can present with pain
radiating around the rib (thoracic radiculopathy) or numbness, spasm, and weakness
of the legs (myelopathy). Sometimes, lumbar stenosis and cervical stenosis co-exist,
and the astute doctor will pickup both diagnoses and render appropriate treatment
for both conditions. Also, leg symptoms and walking difficulty may be due to
clogging of the leg vessels (vascular claudication) rather than due to lumbar
spinal stenosis (neurogenic claudication). Sometimes, both vascular and neurogenic
claudication conditions may co-exist. Again, making the correct diagnosis is
important for subsequent treatment.
As Dr. Eidelson mentioned, lumbar stenosis is largely due to "wear and tear"
or degenerative changes in the joints and intervertebral discs in the spine
over many years, but some patients are born with smaller spinal canal (congenital
stenosis). Congenital stenosis patients typically show symptoms in their 40s
and 50s rather than in their 60s and beyond. Because of smaller canals at birth,
minor bulging discs and degenerated joints tend to affect the nerves earlier
in life in these patients. Some patients with congenital stenosis may undergo
discectomy alone without decompressive procedures for the narrowed canal, and
surgical outcomes may be compromised. Again, correct and precise diagnosis leads
to correct treatment.
Howard S. An, MD
|
|
Your physician is a member of SpineUniverse.com, a co-operative undertaking of world leading spine specialists.
This material is © 1999-2006 SpineUniverse.com and its licensors and is used by permission.
To visit SpineUniverse, please click here.
|
|