They observed on the correlation of positional nystagmus to correspondent conditions which occur in brain tumor. Experimentally induced high liquor Pressure may act as a trigger to evoke positional nystagmus. And to evoke positional nystagmus there is not nescessary be healthy labyrinth, but it plays certain role to change diraction of the nystagmus.
ISONO examine on the etiological factors which made chronicity in supprative otitis media. That is, some bacteria (staphylococci, proteus bacilli and diphtheroid bacilli. And mixed infection of these may be of meaningfull.), some pathological conditions of nose, pharynx or nasopharynx (such as chronic Sinus infection or adenoid) and most severely involved portion in the case of acute otitis media were noticed.
In the patients of pulmonary tuberculosis cocholear sensivity were tested decreaced and vestibular sensitivity however were examind inereaced generally. The latter is prominent in slight cases, and the former seemed remarked in severe cases.
Conclusion are as following. Transitory loud may promote in the amplitude of vestibular nystagmus. And continuous loud, may act as promoter first then as inhibitor.