|
FIG 1. Trigeminal ganglion in trigeminal cistern in cadaver.
A, Trigeminal ganglion (TG) is crescentic in shape and proximal divisions of trigeminal nerve (V1, V2, V3) emerge from its anterolateral border. The trigeminal rootlets (*) enter the crescent-shaped TG. V1 exits the TG as the most superior branch. It lies immediately inferior to cranial nerve four (CN4). V2 leaves TG as the middle branch and V3 as the most inferior division. Venous structures are blue- and arterial red-colored silicon. An extensive pericavernous venous plexus surrounds the ganglion and each of the trigeminal nerve branches (white arrows).
B, Following dissection of the pericavernous venous plexus, the avascular nature of the trigeminal ganglion and its proximal divisions (V1, V2, V3) is seen. The extent of the trigeminal ganglion (between arrowheads) and the trigeminal nerve rootlets (*) are now better delineated. The cranial nerve six (white arrow) is now visible inferior medial to V1. CN indicates cranial nerve
|