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Click-evoked vestibular activation in the Tullio phenomenon.
  1. J G Colebatch,
  2. J C Rothwell,
  3. A Bronstein,
  4. H Ludman
  1. Department of Neurology, Prince of Wales Hospital, Randwick NSW, Australia.


    Click-evoked vestibulocollic reflexes were studied in a patient with a unilateral Tullio phenomenon (sound induced vestibular symptoms) and the findings were compared with those of a group of normal subjects. Compared with normal subjects, the reflexes elicited from her symptomatic side were large and had an abnormally low threshold, but retained a normal waveform. The click-evoked responses in this patient show changes consistent with her symptomatology and are indicative of a pathological increase in the normal vestibular sensitivity to sound.

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