Vestibular Nerve Stimulation for Balance Disorders
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Solution Overview
Problem
Conventional vestibular implants rely on sensors to detect head movement and stimulate the semicircular ducts reactively, failing to address vestibular noise generated by the otolith organs and thus not providing proactive treatment for balance disorders.
Innovation Solution
A vestibular nerve stimulator with implanted electrodes adjacent to the otolith organs in the inner ear generates continuous electrical pulse trains to suppress vestibular noise by directly stimulating the inferior branch of the vestibular nerve, independent of sensor inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vestibular implants use sensors to detect head movement and stimulate semicircular ducts reactively, then the device can respond to head movements, but it fails to address vestibular noise generated by otolith organs and cannot provide proactive treatment
Solution Approach 1:
The patent segments the vestibular system into distinct targets: otolith organs (saccule and utricle) are stimulated separately from the semicircular ducts. By placing electrodes directly adjacent to the otolith organs within the inner ear, the device can selectively suppress vestibular noise generated by these specific structures while maintaining separate functionality for semicircular canal stimulation, thereby addressing multiple sources of balance disorders simultaneously.
Solution Approach 2:
The patent implements preliminary action by continuously stimulating the otolith organs to suppress vestibular noise before it can disrupt balance. Rather than waiting for sensors to detect problematic head movements, the device proactively delivers electrical stimulation to mask noise generated by the otolith organs, preventing balance disturbances before they occur.
2Reliability
If electrodes are implanted adjacent to otolith organs to suppress vestibular noise, then proactive treatment is achieved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single implantable device: the vestibular nerve stimulator combines otolith organ stimulation capability with semicircular canal stimulation in one integrated system. The device incorporates both electrode arrays for different vestibular structures and control circuitry that can manage both proactive noise suppression and reactive movement compensation, reducing the need for multiple separate implants.
Solution Approach 2:
The patent uses electrical stimulation signals as an intermediary mechanism to suppress vestibular noise. Rather than directly modifying the otolith organs or requiring complex mechanical interventions, the device delivers controlled electrical pulses through electrodes to mask noise generation, using electrical energy as a mediator to achieve therapeutic effect with relatively simple hardware.
3Reliability
If continuous electrical pulse trains are delivered to the inferior branch of the vestibular nerve, then vestibular noise is suppressed and balance is improved, but energy consumption increases
Solution Approach 1:
The patent employs periodic action by delivering continuous electrical pulse trains rather than constant DC stimulation. The stimulator applies rhythmic pulses at specific frequencies to the inferior branch of the vestibular nerve, which maintains suppression of vestibular noise while allowing periods of lower energy demand between pulses, thereby reducing overall power consumption compared to continuous maximum-strength stimulation.
Solution Approach 2:
The patent utilizes parameter changes by adjusting stimulation frequency, amplitude, and pulse width to optimize the balance between noise suppression effectiveness and energy consumption. The device can modify electrical stimulation parameters dynamically based on detected vestibular noise levels and patient response, delivering minimal effective doses rather than constant high-energy stimulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The vestibular nerve stimulator effectively improves the recipient's sense of gravitational balance by masking vestibular noise, providing proactive treatment for chronic balance disorders and maintaining balance throughout the day.
Implementation Method 1
generating and delivering one or more continuous electrical pulse trains to the to the inferior branch of the vestibular nerve of the recipient
Data Source
AI summary
Presented herein are techniques for electrically stimulating a recipient's vestibular nerve in order to mask vestibular noise signals (vestibular noise) generated by the peripheral vestibular system (e.g., prevent erroneous balance information generated by the peripheral vestibular system from being sent to the brain of the recipient). A vestibular nerve stimulator in accordance with embodiments presented herein includes a plurality of electrodes implanted in an inner ear of a recipient at a location that is adjacent to the otolith organs of the inner ear. The vestibular nerve stimulator is configured to generate one or more continuous pulse trains and to deliver the one or more continuous pulse trains to the inferior branch of the recipient's vestibular nerve.