filum

A structure of filamentous or threadlike appearance. [L. thread]

- f. durae matris spinalis SYN: dural part of f. terminale.

- fila olfactoria [TA] SYN: olfactory nerves [CN I], under nerve.

- olfactory fila SYN: olfactory nerves [CN I], under nerve.

- radicular fila the small, individual fiber fascicles into which the roots of all of the spinal nerves and several cranial nerves (hypoglossus, vagus, oculomotorius) divide in fanlike fashion before entering or leaving the spinal cord or brainstem; the spinal dorsal root may divide into 8–12 such rootlets. SYN: fila radicularia [TA], root filaments.

- fila radicularia [TA] SYN: radicular fila.

- f. of spinal dura mater SYN: dural part of f. terminale.

- terminal f. a long connective tissue (pia mater) strand extending from the extremity of the medullary cone to the inner aspect of the spinal dural sac (pial part of f. terminale [TA], f. terminale internum [TAalt]; stout strands of connective tissue attaching the spinal dural sac to the coccyx (dural part of f. terminale [TA], coccygeal ligament [TAalt], f. terminale externum [TAalt]. SYN: f. terminale [TA], nervus impar, terminal thread.

- f. terminale [TA] SYN: terminal f..

- f. terminale externum dural part of f. terminale.

- f. terminale internum pial part of f. terminale.

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fi·lum 'fī-ləm n, pl fi·la -lə a filamentous structure: FILAMENT

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n.

a threadlike structure. The filum terminale is the slender tapering terminal section of the spinal cord.

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fi·lum (fiґləm) pl. fiґla [L.] a threadlike structure or part.