Filum terminale internum

Latin synonym: Pars pialis fili terminalis
Synonym: Pial part of filum terminale; Pial filament
Related terms: Pial part; Pial part; Pial filament; Filum terminale internum; Terminal filum: Pial part; Pial filament; Filum terminale internum

The filum terminale internum (upper part of the filum terminale) measures about 15 cm. in length and reaches as far as the lower border of the second sacral vertebra. It is contained within the tubular sheath of dura mater, and is surrounded by the nerves forming the cauda equina, from which it can be readily recognized by its bluish-white color.

References

This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).