Subs30

Hi Scott

Yes--its typical

From the Northwestern Univ web site (the one in the "sticky"):

...."A common feature of vestibular neuritis is selective damage to the superior part of the vestibular labyrinth (horizontal and anterior semicircular canals and utricle) supplied by the superior division of the vestibular nerve, with sparing of the inferior part (posterior semicircular canal and saccule) supplied by the inferior division--- Benign paroxysmal positional vertigo (originating from the posterior semicircular canal) often develops as a sequela even if the patient has no remaining function in the horizontal or anterior semicircular canal--- Selective inflammation of the superior division of the vestibular nerve---- or anatomical differences in the bony canals of the two divisions might explain this relative vulnerability. ".....

Also from the same web site:

...."commonly called vestibular neuritis, although other terms such as "vestibular neuronitis," "labyrinthitis," "neurolabyrinthitis," and "unilateral vestibulopathy of unknown cause" have also been used---The condition is thought to result from a selective inflammation of the vestibular nerve, presumably of viral origin. The facts that the disorder often has a viral prodrome, that it occurs in epidemics, that it may affect several members of the same family, and that it occurs more commonly in spring and early summer all support a viral cause--- Postmortem studies have found atrophy of the vestibular nerve and the vestibular sensory epithelium that is similar to the pathological findings with known viral disorders of the inner ear, such as measles and mumps--- Several viruses selectively infect the labyrinth, the 8th nerve, or both".......