The VORTEQ high frequency VOR test system provides information about the vestibulo-ocular reflex in subjects who present with dizziness. As a complement to ENG or VNG and Rotational Chairs the VORTEQ offers a simple method to further evaluate VOR gain, phase and symmetry in the frequency range 0.5 to 8Hz.

During testing, a standard configuration of ENG electrodes and an EOG amplifier records eye movement whilst, simultaneously, an accelerometer records head velocity. The subject shakes their head in a "Yes" or "No" direction to the beat of an electronic metronome over a frequency range specified for the test. Software algorithms quickly and automatically analyse eye and head velocities over the 15 second test period to determine VOR gain, phase and symmetry. Results are graphed and printed in both summary and composte reports.
The Vorteq is supplied as a stand alone system or as an option for our Visual Eyes and Rotating Chair Systems