The spinal cord is protected by rings of bone that make up the middle and posterior (rear) portion of the spinal column.
In each of these rings, the pars interarticularis (or simply "pars" for short) connects other components of the ring, known as the pedicle and lamina.
Specifically, this is common in offensive and defensive linemen.
The vertebra initially responds to increased physical strain of such activity by gradually adding new bone cells around the stressed area of the spine.
However, some people with this condition may not develop symptoms until later in adulthood.
Illustration of the Spinal Column and Location of a Pars Fracture (Spondylolysis) The lower portion of the spinal column is called the lumbar spine.
These are separate but sometimes related conditions.
Spondylolysis is a spinal fracture of a bone structure called the pars interarticularis, which connects the facet joints of the spine.
In adults, spondylolysis more often affects women and those who are 50 and older with conditions like arthritis.
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