Selective VIII th nerve section was performed in two petients with Meniere's disease and one with tinnitus after labyrinthitis. Cerebello-pontine (CP) cistern was approached after suboccipital trephining. The It VIII th nerve was separated into vestibular and auditory portions, and audiotory evoked potentials were recorded. Then either nerve was severed selectively. After the operation, vertigo attacks ceased in the two Meniere's disease patients. Intensity of tinnitus decreased by more than half in all three patients. The post operative time course was uneventful in all three.
