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Nerve compression syndrome, or compression neuropathy, or nerve entrapment syndrome, is a medical condition caused by chronic, direct pressure on a peripheral nerve. [1] It is known colloquially as a trapped nerve, though this may also refer to nerve root compression (by a herniated disc, for example).
Dysfunction of the superior cluneal nerves is often due to entrapment as the nerves cross the iliac crest – this can result in numbness, tingling or pain in the low back and upper buttocks region. Superior cluneal nerve dysfunction is a clinical diagnosis that can be supported by diagnostic nerve blocks. [1]
It can reliably identify spinal nerve root compression for L2, L3, and L4. [2] It is usually positive for L2-L3 and L3-L4 (high lumbar) disc protrusions, slightly positive or negative in L4–L5 disc protrusions, and negative in cases of lumbosacral disc protrusion. [3]
Meralgia paresthetica is a specific instance of nerve entrapment. [5] The nerve involved is the lateral femoral cutaneous nerve (LFCN). [6] [7] [4] [8] The symptoms are purely sensory because the LFCN has no motor function. [4] This syndrome can be caused by anything which places prolonged pressure on the LFCN, such as wearing a tight belt.
Symptoms of LSS, including NC, are the most common reason patients 65 and older undergo spinal surgery. Surgery is generally reserved for patients whose symptoms do not improve with nonsurgical treatments, and the main objective of surgery is to relieve pressure on the spinal nerve roots and recover normal mobility and quality of life. [10]
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 third lumbar spinal nerve (L3) [3] originates from the spinal column from below the lumbar vertebra 3 (L3). L3 supplies many muscles, either directly or through nerves originating from L3. They may be innervated with L3 as single origin, or be innervated partly by L3 and partly by other spinal nerves. The muscles are: quadratus lumborum ...
The nerve roots from L4–S4 join in the sacral plexus which affects the sciatic nerve, which travels caudally (toward the feet). Compression, trauma or other damage to this region of the spinal canal can result in cauda equina syndrome. [citation needed] The symptoms may also appear as a temporary side-effect of a sacral extra-dural injection. [9]