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The Vestibular System

The Vestibular System

The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.

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Summary

This study introduces the first wearable audio-motion processor (AMP) for cochlear-vestibular implants (CVI). The device delivers simultaneous, modulated auditory and vestibular stimulation, crucial for patients with combined hearing and balance impairments.

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Area of Science:

Biomedical Engineering
Neuroscience
Audiology

Background:

Cochlear implants (CI) treat severe hearing loss, and vestibular implants (VI) show promise for vestibular dysfunction.
Some patients require combined cochlear and vestibular implants (CVI) for both hearing and balance restoration.
Existing CVI technology lacks a wearable processor for sustained, specific stimulation of both systems.

Purpose of the Study:

To introduce and evaluate the first wearable audio-motion processor (AMP) for cochlear-vestibular implants (CVI).
To assess the AMP's performance in delivering simultaneous, modulated auditory and vestibular stimulation.
To characterize the device's latency and accuracy in response to motion stimuli.

Main Methods:

Developed a novel wearable audio-motion processor (AMP) architecture for CVI systems.
Utilized a testbench with a rotary platform to apply controlled single-axis rotations.
Measured device latency, stimulation amplitude, and pulse rate accuracy against programmed transfer functions (TF).

Main Results:

The AMP demonstrated latency comparable to normal vestibular organ response times.
Accurate tracking of programmed transfer functions for vestibular stimulation amplitude and pulse rate.
Successful simultaneous auditory and vestibular stimulation delivery was confirmed.

Conclusions:

The developed AMP is the world's first wearable processor for combined cochlear and vestibular stimulation.
This innovation addresses a critical need for patients with combined hearing and vestibular impairments.
The AMP shows high fidelity and low latency, paving the way for improved CVI functionality.