These clinical studies of auditory and vestibular signs in multiple sclerosis are based on the examination of ten cases in which the diagnosis of this disease had been made. The examination divides itself naturally into: (1) a determination of the status of the sense of hearing; (2) the estimation of the presence or absence of spontaneous signs of disturbances in the vestibular apparatus, and (3) the observation of the character of the responses to experimental vestibular stimulation.
All ten subjects of this examination had normal middle ears. In none was there any disturbance of hearing, and there was no history of deafness. Transitory deafness, however, does occur as a symptom of multiple sclerosis, and has been reported by Beck1 in two cases. In a third case, in which the diagnosis was not positive, there were temporary disturbances in hearing, of the nerve type. He believes this analogous to the