Medical Dictionary

cauda equina

noun cauda equi·na \ -ek-ˈwē-nə , -ē-ˈkwī-nə \

medical Definition of cauda equina

plural caudae equinae play \-ek-ˈwē-ˌnī, -ē-ˈkwī-ˌnē\
:the roots of the spinal nerves that extend beyond the termination of the spinal cord at the first lumbar vertebra in the form of a bundle of filaments within the vertebral canal resembling a horse's tail
  • From its tip at the base of the spine, about 20 stringy nerves—called the cauda equina, or horse's tail—travel downward within a fluid-filled sac.
  • —Bruce H. DobkinDiscoverNovember 1996

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