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Filum terminale

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In translation, a terminal thread, i.e. a long strand of connective tissue extending from the apex of the medullary cone to the coccyx, providing longitudinal support to the spinal cord


Filum terminale is comprised of two parts:

  • filum terminal internum, longer, slender, pial portion that is ~15 cm in length
  • filum terminale externum, shorter, stouter, dural portion that is ~5cm in length, also called the coccygeal ligament