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Lumbosacral Radiculopathy Definition. Lumbosacral radiculopathy is a broad term referring to a range of symptoms associated with the nerves of the lumbosacral plexus in the lower back. The lumbosacral plexus encompasses the nerves that exit the spinal cord at the lumbar, sacral and coccygeal regions of the spine. Radiculopathy occurs when an anatomical abnormality has caused one or more of these nerves to become irritated, pinched or impinged.
What is radiculopathy? Radiculopathy, also known as sciatica, is a pain that originates along the sciatic nerve, which extends from the back of the pelvis down the back of the thigh. The sciatic nerve is the primary nerve of the leg. It is also the largest nerve in the entire body. What causes radiculopathy? Usually, radiculopathy is caused by a herniated disk in the spine that presses on the sciatic nerve. Other causes that may put pressure on the sciatic nerve may include the following: tumor; abscess; blood clot; awkward sitting position; any nerve disorders; Sometimes, a cause for the radiculopathy cannot be identified.