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2. Conus medullaris - Wikipedia

   en.wikipedia.org/wiki/Conus_medullaris

   The conus medullaris (Latin for "medullary cone") or conus terminalis is the tapered, lower end of the spinal cord. It occurs near lumbar vertebral levels 1 (L1) and 2 (L2), occasionally lower. [ 1 ] [ 2 ] The upper end of the conus medullaris is usually not well defined, however, its corresponding spinal cord segments are usually S1–S5.

3. Lumbar enlargement - Wikipedia

   en.wikipedia.org/wiki/Lumbar_enlargement

   The lumbar enlargement (or lumbosacral enlargement) is a widened area of the spinal cord that gives attachment to the nerves which supply the lower limbs.. It commences about the level of T11 and ends at L2, and reaches its maximum circumference, of about 33 mm. Inferior to the lumbar enlargement is the conus medullaris.

4. Cauda equina - Wikipedia

   en.wikipedia.org/wiki/Cauda_equina

   The cauda equina (from Latin tail of horse) is a bundle of spinal nerves and spinal nerve rootlets, consisting of the second through fifth lumbar nerve pairs, the first through fifth sacral nerve pairs, and the coccygeal nerve, all of which arise from the lumbar enlargement and the conus medullaris of the spinal cord.

5. Conus medullaris syndrome - Wikipedia

   en.wikipedia.org/?title=Conus_medullaris...

   Pages for logged out editors learn more. Contributions; Talk; Conus medullaris syndrome

6. Tethered cord syndrome - Wikipedia

   en.wikipedia.org/wiki/Tethered_cord_syndrome

   A tethered cord is often diagnosed as a "low conus". 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 ...

7. Filum terminale - Wikipedia

   en.wikipedia.org/wiki/Filum_terminale

   The filum terminale is situated centrally [2] amid the spinal nerve roots of the cauda equina [3] [2] (but is not itself a part of the cauda equina [2]).. The inferior-most spinal nerve, the coccygeal nerve, leaves the spinal cord at the level of the conus medullaris via respective vertebrae through their intervertebral foramina, superior to the filum terminale.

8. Thecal sac - Wikipedia

   en.wikipedia.org/wiki/Thecal_sac

   The lumbar cistern is part of the subarachnoid space.It is the space within the thecal sac which extends from below the end of the spinal cord (the conus medularis), typically at the level of the first to second lumbar vertebrae down to tapering of the dura at the level of the second sacral vertebra.

9. Lumbar puncture - Wikipedia

   en.wikipedia.org/wiki/Lumbar_puncture

   The conus medullaris (bottom of the spinal cord) terminates at the level of L1 in adults, but may range in term neonates (newly born babies) from L1–L3 levels. [31] It is important to insert the spinal needle below the conus medullaris at the L3/L4 or L4/L5 interspinous levels. [32]