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Low back pain Spondylolysis and Spondylolisthesis

Middle arrow of facet joint pointing to fracture of pars interarticularis
What are Spondylolysis and Spondylolisthesis? Spondylolysis is a primary stress fracture of the pars interarticularis of the vertebral arch.  In the image to the right, this region is seen as the middle arrow of the facet joint region. The fifth and fourth lumbar vertebra are most often involved.  The defect itself can occur on one or both sides of the vertebra. When it occurs on both sides, the angle of the sacral base can promote a forward slippage of the vertebra, resulting in a spondylolist...
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low back pain Thornhill and Markham

Low back pain Incidence of low back pain Low back pain is a common complaint.  A recent study has shown that the incidence of low back pain in the population ranges from 38% to 70% of an adult population. Anatomy of the low back The low back typically refers to the joints and tissues of the lumbar spine. This area represents the bottom 5 spinal vertebra (bones) between the thoracic spine and the sacrum (triangular bone in the pelvis). The vertebra are connected by the intervertebral discs. T...
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