Body balance function of cochlear implant patients with and without sound conditions. Issue 10 (October 2018)

• Record Type: Journal Article
• Authors: Oikawa, Kaori; Kobayashi, Yumiko; Hiraumi, Harukazu; Yonemoto, Kiyoshi; Sato, Hiroaki
• Is Part Of: Clinical neurophysiology. Volume 129:Issue 10(2018:Oct.)
• Page Start: 2112
• Page End: 2117
• Publication Date: 2018-10
• Subjects: Cochlear implant -- Posturography -- Anechoic; CI cochlear implant -- COP center of pressure; Neurophysiology -- Periodicals; Electroencephalography -- Periodicals; Electromyography -- Periodicals; Neurology -- Periodicals; 612.8
• DOI: 10.1016/j.clinph.2018.07.018
• Languages: English
• ISSNs: 1388-2457

Abstract

Highlights: The center of pressure of cochlear implant patients was measured in an anechoic room. The center of pressure shifted laterally in silent condition with their eyes closed. This abnormal shift was eliminated with sound. Abstract: Objective: The relation between well-controlled auditory stimulation through cochlear implant (CI) and the body balance has been sparsely investigated. The purpose of this study was to evaluate the body balance function of CI patients with- and without-sound in anechoic sound-shielded room. Methods: We recorded 8 experienced CI recipients and 8 young normal-hearing volunteers. All subjects were assessed using posturography under 4 conditions: (1) eyes open with-sound, (2) eyes closed with-sound, (3) eyes open without-sound, and (4) eyes closed without-sound. Results: The total path length and the total area were significantly larger in the eyes closed condition than in the eyes open condition. In normal hearing subjects, the average displacement of center of pressure (COP) in the mediolateral direction under with-sound condition was not different from that under without-sound condition. In CI recipients, the COP significantly displaced to the CI side after the deprivation of visual cues in without-sound condition. This shift was eliminated in with-sound condition (significant interaction among sound condition, eye condition, and between-group factor). Conclusion: In CI subjects, sound stimulation improves the abnormal displacement of COP in the mediolateral direction. Significance: A posturographic study under an anechoic condition proved that sound stimulation improves body balance function in CI subjects.