[The use of computer electronystagmography in the assessment of optokinetic nystagmic reactions]. / Primenenie komp'iuternoi élektronistagmografii v otsenke optokineticheskikh nistagmennykh reaktsii.

A novel technique of computer-assisted electronystagmography (CENG) has been used in 90 patients with vertigo. Two variants of optokinetic nystagmus (cortical and subcortical) were analysed. Registration of optokinetic nystagmus (OKN) was carried out using original devices for CENG. Right- and left-directed nystagmic reactions and their quantitation were performed according to specially devised registering and analysing programs. In one-sided vestibular disorders cases of cross-over OKN asymmetry prevailed in affection of the cerebellopontine angle (neurinoma of the VIII nerve) compared to labyrinthine disturbances (one-sided Meniere's disease). In 90% of patients with vertebrobasillar deficiency OKN asymmetry was found even in a straight position of the head. OKN asymmetry was less pronounced or disappeared in the OKN test performed with the head turned right or left by 90 degrees.

[The effect of Lasix on nystagmus in the caloric and optokinetic tests in Menière's disease]. / Vliianie laziksa na nistagm v kaloricheskom i optokineticheskom testakh pri bolezni Men'era.

The study was made of labyrinthine changes induced by lasix dehydration. Changes indicative of Meniere's disease were identified at comparison of the findings obtained by audiological lasix test, caloric optokinetic reactions. Four types of the nystagmic response in the bithermal lasix-test were determined. These reactions are helpful for more precise staging of the disease.