[Electronystagmographic studies in patients with multiple sclerosis (author's transl)].

An E.N.G. examination utilizing the pendular rotation test was carried out in 200 patients with multiple sclerosis who had been completely studied from the neurological point of view. The E.N.G. study did not only reveal a nystagmus in cases in which it was not detected by clinical examination but particularly it allowed the detailed analysis of different types of nystagmus the clinical examination of which had not permitted to reveal the components. The spontaneous nystagmus was proved to be particularly multiform in this disease. Quite often a combination of two or three types of nystagmus was recorded on the same E.N.G. The most frequent type was the dissociated nystagmus of abduction and secondly the vertical type. The pendular rotation test appeared to be very useful in revealing abnormalities mainly of the central type, in cases in which spontaneous nystagmus was not recorded.