The dissociative nerve damage is rarely permanent and paralysis is seldom a danger as the spinal cord ends before the first lumbar vertebra. However, an increase in the trunk or leg weakness, bladder or incontinence and / or intestines is an indication of Cauda Equina Syndrome, a serious disorder requiring emergency treatment.
The Lumbar spine disorders known to cause sciatic nerve compression include:
• Herniated discs are the most common cause of sciatica in the lumbar spine.
• Degenerative Disc Disease, a natural biological process associated with aging, is known to cause disc weakness and may be a precursor to a herniated disc.
• Lumbar Spinal Stenosis, a narrowing of one or more neural passageways due to disc degeneration and / or facet arthritis. The sciatic nerve may become impinged as a result of these changes.
• Isthmus Spondylolisthesis results from a stress fracture often at the 5th lumbar vertebra (L5). The fracture combined with disc space collapse, could cause the vertebra to slip forward on the first sacral segment (S1). The slip can cause a pinching of the nerve root at L5 leaves the spine.
The Spinal Tumors and Infections are other disorders that may compress this nerve, but are rare.
There are other conditions that may occur, and may look like a sciatic nerve pain, but are difficult to diagnose.