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Medical Term:

cauda equina


the bundle of spinal nerve roots arising from the lumbosacral enlargement and medullary cone and running through the lumbar cistern (subarachnoid space) within the vertebral canal below the first lumbar vertebra; it comprises the roots of all the spinal nerves below the first lumbar.

[L. horse tail]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.