Abstract
Abstract Conventional vestibular examination tests the function of the pair of horizontal semicircular canals and ignores the two pairs of vertical semicircular canals and otoliths. For complete vestibular testing, a four-axis gimbal system was constructed with two motor-driven axes and two axes which are manually adjustable. This apparatus allows stimulation of all semicircular canals and also-by rotation with respect to the gravity vector-of the otoliths. Positioning the subject in a light-proof sphere prevents visual orientation in space. Projected visual stimuli (light spot and full-field random dot pattern) complete the possibilities for oculomotor testing. Largely avoiding the use of metal offers the possibility of three-dimensional eye movement recording with the search coil method.
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