Spinal Conditions - Definitions
Basic Problem - As a result of the natural wear and tear that occurs with aging, certain parts of the spine start to degenerate and wear out, as we grow older. This process makes some of the anatomic structures of the spine, the bones, intervertebral discs, ligaments, and muscles less flexible and less resistant to injury.
Spondylolysis
Spondylolysis is a defect in the lamina of the vertebrae in the pars
interarticularis, usually the fourth or the fifth lumbar vertebrae in the lower
(lumbar) spine. Spondylolysis may occur as a congenital defect or be the result
of repetitive trauma. Some physicians believe spondylolysis may be caused by
genetics, and that someone could be born with thin vertebral bones causing them
to be vulnerable to the condition. Spondylolysis is common in teenage gymnasts
and football players, and presents with lower back pain that is worse with
strenuous exercise or activity. Radiographic findings are subtle, but bone scans
or CT scans will usually detect the lesion. Activity modification, bracing, or
surgical treatment may be indicated for persistent symptoms.
Spondylolisthesis
Spondylolysis is a prerequisite for spondylolisthesis.
Spondylolisthesis occurs when spondylolysis weakens one of the vertebrae so much
that the bone slips out of place. 
The condition can also be caused by degenerative disc disease. If the vertebrae
slip too much and begin to press on nerves, surgery may become necessary.
Spondylolisthesis may also be caused by degenerative conditions that affect the
vertebral joints, such as cerebral palsy.
Early treatment usually involves rest and medication. Progressive spondylolisthesis usually requires surgical treatment.
There are five types of Spondylolisthesis - here are the three most common.
1. Type I is called dysplastic spondylolisthesis and is secondary to a congenital defect of either the superior sacral or inferior L5 facets or both with gradual slipping of the L5 vertebra.
2. Type II, isthmic or spondylolytic, in
which the lesion is in the isthmus or pars interarticularis, has the greatest
clinical importance in persons under the age of 50. If a defect in the pars
interarticularis can be identified but no slipping has occurred, the condition
is termed spondylolysis. If one vertebra has slipped forward on the other
(horizontal translation), it is
referred
to as spondylolisthesis. 
3. Type III, is a degenerative spondylolisthesis, and occurs as a result of the degeneration of the lumbar facet joints. The alteration in these joints can allow forward or backward vertebral displacement. This type of spondylolisthesis is most often seen in older patients. In Type III, degenerative spondylolisthesis there is no pars defect and the vertebral slippage is never greater than 30%
Sprains & Strains
Most acute pain in the back results from sustaining a mild strain in the back or
back musculature. Sprains and strains in your lower back usually happen during a
sudden and stressful injury, causing stretching or tearing of the muscles,
tendons, or ligaments in your lower back. When you strain or sprain your lower
back it causes a lot of stress on your spine, irritating it. If you have this
condition you may also suffer from painful muscle spasms which can occur during
your daily activities or at night while you're sleeping. The pain is usually
limited to five or ten days.
Sciatica
Sciatica is the descriptive term for when pain runs from your back or buttocks
down your leg and into your foot
It is a condition caused by either compression or trauma of the sciatic nerve.
Sciatica is made worse when you cough or if someone lifts your leg up while you
are laying down. Symptoms may begin abruptly or gradually, are usually irritated
by movement, and often grow worse at night. Sciatica implies that there is an
irritation of your nerve root in the lower part of your spine. In some
instances, this could be due to a ruptured or herniated disc in your lower back.
Herniated / Ruptured Discs
A herniated ("slipped") or ruptured disc in your back can
cause each of these pain patterns. The ways in which a slipped disc causes
different pain patterns and problems with your back is related to the location
of the slipped disc along your spine, and also to the anatomy of your spinal
column.
The spinal column, or backbone, consists of 33 bones (vertebrae) and can be
divided into five segments, called the cervical, thoracic, lumbar, sacral, and
coccygeal sections of the spine. Each of these sections corresponds to a
particular part of your body. The cervical spine is that part of the spine in
your neck, the thoracic spine supports your trunk, the lumbar spine supports
your lower back and abdomen, the sacrum supports your pelvis, and the coccyx is
your tailbone.
Stenosis
Stenosis produces a dull, aching pain in the lower back
when standing or walking. The pain usually radiates down into the buttocks and
thighs, and can be relieved by stopping to rest, or by using a walker or a
shopping cart in the grocery store. These symptoms usually slowly get worse over
time, and people who suffer from spinal stenosis will notice a slow decrease in
their ability to walk shorter and shorter distances.
Lumbar stenosis is a natural product of aging, and the wear and tear on the
spine throughout our lives. As our bodies grow older, the ligaments and bones
that make up the spine grow thicker and become stiffer. The spinal canal
gradually narrows, and the spinal cord is slowly compressed. The lack of space
interferes with the normal function of the spinal cord and the body becomes less
able to function normally.
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Last Updated: January 1, 2008