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2. Superior cluneal nerves - Wikipedia

   en.wikipedia.org/wiki/Superior_cluneal_nerves

   The most common symptoms are localized unilateral low back pain, though up to anywhere between 40 and 82% of patients may complain of leg symptoms – pain or dysethesia. [5] [11] [12] The onset of pain can vary, with some patients report sudden onset of pain with a known inciting incident. [13]

3. Cauda equina syndrome - Wikipedia

   en.wikipedia.org/wiki/Cauda_equina_syndrome

   After the conus medullaris (near lumbar vertebral levels 1 (L1) and 2 (L2), occasionally lower), the spinal canal contains a bundle of nerve fibers (the cauda equina or "horse-tail") that branches off the lower end of the spinal cord and contains the nerve roots from L1–L5 and S1–S5. The nerve roots from L4–S4 join in the sacral plexus ...

4. Tethered cord syndrome - Wikipedia

   en.wikipedia.org/wiki/Tethered_cord_syndrome

   The conus medullaris (or lower termination of the spinal cord) normally terminates at or above the L1-2 disk space (where L1 is the first, or topmost lumbar vertebra). After about 3 months of age, a conus below the L1-2 disk space may indicate a tethered cord and termination below L3-4 is unmistakably tethered.

5. Conus medullaris - Wikipedia

   en.wikipedia.org/wiki/Conus_medullaris

   Conus medullaris syndrome is a collection of signs and symptoms associated with injury to the conus medullaris. [4] It typically causes back pain and bowel and bladder dysfunction, spastic or flaccid weakness depending on the level of the lesion, and bilateral sensory loss.

6. Lumbar spinal stenosis - Wikipedia

   en.wikipedia.org/wiki/Lumbar_spinal_stenosis

   Lumbar spinal stenosis; Other names: wear and tear in the spine: Lumbar vertebra showing central stenosis and lateral recess stenosis. Specialty: Orthopedics: Symptoms: Pain, numbness, or weakness in the low back, buttocks, or legs typically worsened with prolonged walking or standing and relieved with sitting or lying down: Usual onset ...

7. Lumbar nerves - Wikipedia

   en.wikipedia.org/wiki/Lumbar_nerves

   The second lumbar spinal nerve (L2) [2] originates from the spinal column from below the lumbar vertebra 2 (L2). L2 supplies many muscles, either directly or through nerves originating from L2. They may be innervated with L2 as single origin, or be innervated partly by L2 and partly by other spinal nerves. The muscles are: quadratus lumborum ...