nervus impar -->
terminal filum
medical dictionary

A long, slender connective tissue (pia mater) strand extending from the extremity of the medullary cone to the internal aspect of the spinal dural sac (filum terminale internum); stout strands of connective tissue attaching the spinal dural sac to the coccyx (filum terminale externum), commonly called the coccygeal ligament.

Synonyms: filum terminale, nervus impar, terminal thread.

(05 Mar 2000)