ВПЛИВ КОХЛЕАРНОЇ ІМПЛАНТАЦІЇ НА ЯКІСНІ ПОКАЗНИКИ ОПТОКІНЕТИЧНОГО НІСТАГМУ У ДІТЕЙ
The assessment of basic characterisitics of optokinetic nystagmus in postoperative period in patients after cochlear implantation may play a key role for the early diagnostics of vestibular system disorders. Objective. To assess the influence of cochlear implantation on qualitative indeces of optokinetic nystagmus in children with severe sensorineural hearing loss and deafness. Material and methods. 50 children after cochlear implantation were examined. The comparison group consisted of 15 children with sensorineural hearing loss, 10 children with normal hearing and no complaints of vestibular disorders made a control group. The study consisted of the optokinetic nystagmus registration (OKN) with electronystagmographic record of the results and further analysis of the qualitative indicators. Conclusion. It was shown that toothed curve of OKN was associated with deafness either before cochlear implantation or after it. We found that cochlear implantation resulted in asymmetry of OKN qualitative indicators. The most informative conditions of optokinetic stimulation in children after cochlear implantation were determined. Key words: optokinetic nystagmus, sensorineural hearing loss, cochlear implantation, children