filum terminale potition pictures
The filum terminale (terminal thread), is a aerial fiber of coarse tissue, about 20 cm. in length, proceeding bottomward from the acme of the conus medullaris. It gives longitudinal abutment to the analgesic bond and consists of two parts:
The high part, or filum terminale internum, is about 15 cm. continued and alcove as far as the lower bound of the additional sacral vertebra. It is connected aloft with the pia academy and independent aural a tubular sheath of the dura mater. In addition, it is amidst by the fretfulness basic the cauda equina, from which it can be calmly accustomed by its bluish-white color.
The lower part, or filum terminale externum, carefully adheres to the dura mater. It extends bottomward from the acme of the tubular sheath and is absorbed to the aback of the aboriginal articulation of the coccyx in a anatomy sometimes referred to as the coccygeal ligament.
The best inferior of the analgesic nerves, the coccygeal assumption leaves the analgesic bond at the akin of the conus medullaris, above to the filum terminale. However, adhering to the alien apparent of the filum terminale are a few strands of assumption fibers which apparently represent abecedarian additional and third coccygeal nerves[citation needed]. Furthermore, the axial aqueduct of the analgesic bond extends 5 to 6 cm. above the conus medullaris, bottomward into the filum terminale.
