Influence of tonotopic cochlear stimulation on subjective visual vertical - a pilot study.

Objective: This pilot study aimed at evaluating the effect of tonotopic (basal) stimulation on the Subjective Visual Vertical (SVV) in patients unilaterally treated with a Cochlear Implant (CI).

Materials And Methods: Ten adult subjects with severe to profound sensorineural hearing loss, who were implanted with a CI from Advanced Bionics (AB, Stäfa, Switzerland), model HiRes 90KTM or newer, were included in this prospective pilot study between September and December 2020. A specific CI processor (Naída CI Q90) was used to generate five different stimulation modes: simulation of either basal, medial, or apical electrodes, all electrodes on and all electrodes off.