TABLE 1.

Vestibular prosthesis comparison.

	VI UW/Nucleus freedom	VI Geneva-Maastricht	LD-MVI	Bionic vest
Sensor	None	3D-gyroscope	3D-gyroscope	None
Processing and coding unit	Pacemaker fixed pulse rate	Linear transfer function to modulate pulse amplitude and frequency	Codes for amplitude and rate of pulse frequency with a 32-point piecewise-linear approximation to a sigmoid curve	Pacemaker fixed pulse rate and amplitude
Electrode implantation	Perilymphatic space adjacent to each SCC ampullae	Inserted in the three SCC ampullae	Inserted in the three SCC ampullae	Adjacent to the saccular nerve
Behavioral response	Modulation of ocular movements Auditory and vestibular loss No further use.	VOR, vestibulo-colic, and vestibulo-espinal reflex restoration. Cognitive response	VOR restoration, Gait, position, and stabilization. Significant improvement in the quality of life.	Gait and gaze stabilization. Significant improvement in the quality of life.