application of hrp at different locations of the recurrent facial nerve labelled three different sizes of sensory perikarya within the geniculate ganglion -- small ( 6-15 micron in diameter ) , medium ( 18-24 micron ) , and large ( greater than 25 micron ) -- which corresponds to the different size classes of fibres present within the nerve .
C0015462
facial nerve
C0017406
geniculate ganglion