lumbar cistern


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Related to lumbar cistern: cauda equina, Filum terminale, Denticulate ligament, epidural space, Lateral horn, supracristal plane, Spinal meninges

lum·bar cis·tern

[TA]
enlargement of the subarachnoid space between the conus medullaris of spinal cord (about vertebral level L2) and inferior end of subarachnoid space and dura mater (about vertebral level S2); occupied by the posterior and anterior roots constituting the cauda equina, the terminal filum, and cerebrospinal fluid; site for lumbar puncture and spinal anesthesia.
Synonym(s): cisterna lumbalis [TA]

lumbar cistern

In the subarachnoid space of the vertebral column, the fluid-filled space between the end of the spinal cord (vertebral level L1-L2 in adults) and the end of the arachnoid-dural membrane (vertebral level S2).
See also: cistern