[Controlled ENG examinations of patients with lack of induced unidirectional Ny]

19 patients have been checked by the ENG control examination who had demonstrated during first examination lack of evoked Ny in one direction. The control examinations have been conducted from a few months to 4 years after the first ENG examination. Obtained results showed out that lack of evoked Ny in one direction can be persist or can be improved by going into symmetrical directional preponderance, after that in some cases coming to restitution and integrum. It can be explained by the degree of brainstem reticular substance lesion. The obtained results from the study allow to conclude, that lack of evoked Ny in one direction and coming after it the symmetrical directional preponderance have a topo-diagnostic value.