[Directional preponderance of caloric nystagmus in vestibular neuronitis]

The aim of this work was an analysis of caloric directional preponderance prevalence in patients with vestibular neuronitis and coincidence of above mentioned symptoms with spontaneous and positional nystagmus. The examinations were carried out in 36 patients, aged 27-51, 19 women and 17 men. The vestibular reactions were recorded by electronystagmography and directional preponderance and mean angle velocity of the slow phase were calculated. It was pointed out that in vestibular neuronitis patients the directional preponderance may appear early and in great number of cases with canal paresis. However, in the late stages of vestibular neuronitis the directional preponderance may appear independently without the spontaneous and positional nystagmus.