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Concept
Radiculopathy
Summary
Radiculopathy, also commonly referred to as pinched nerve, refers to a set of conditions in which one or more nerves are affected and do not work properly (a neuropathy). Radiculopathy can result in pain (radicular pain), weakness, altered sensation (paresthesia) or difficulty controlling specific muscles. Pinched nerves arise when surrounding bone or tissue, such as cartilage, muscles or tendons, put pressure on the nerve and disrupt its function.
In a radiculopathy, the problem occurs at or near the root of the nerve, shortly after its exit from the spinal cord. However, the pain or other symptoms often radiate to the part of the body served by that nerve. For example, a nerve root impingement in the neck can produce pain and weakness in the forearm. Likewise, an impingement in the lower back or lumbar-sacral spine can be manifested with symptoms in the foot.
The radicular pain that results from a radiculopathy should not be confused with referred pain, which is different both in mechanism and clinical features. Polyradiculopathy refers to the condition where more than one spinal nerve root is affected.
Radiculopathy most often is caused by mechanical compression of a nerve root usually at the exit foramen or lateral recess. It may be secondary to intervertebral disk herniation (most commonly at C7 and then the C6 level), degenerative disc disease, osteoarthritis, facet joint degeneration/hypertrophy, ligamentous hypertrophy, spondylolisthesis, or a combination of these factors. Other possible causes of radiculopathy include neoplastic disease, infections such as shingles, HIV, or Lyme disease, spinal epidural abscess, spinal epidural hematoma, proximal diabetic neuropathy, Tarlov cysts, or, more rarely, sarcoidosis, arachnoiditis, tethered spinal cord syndrome, or transverse myelitis.
Repeated, longer term exposure (5 years or more) to certain work-related activities may put people at risk of developing lumbosacral radiculopathy. These behaviours may include physically demanding work, bending over or twisting at the trunk, lifting and carrying, or a combination of these activities.
Official source
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