視覚系と前庭系の相互作用による水平回転感覚の基礎特性

概要

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We investigated visual-vestibular interaction when a body that was passively rotated about its vertical axis while rotating vertical gratings were visually presented. A turntable, which generated a constant angular acceleration stimulated the semicircular canals and a head mounted display, provided an independent visual input. Vestibular stimulation ranged between 0.02deg/s^2 and 2.0deg/s^2. We found that visual image information was predominat when the visual image was presented and the body acceleration was less than 0.1deg/s^2. We also found that in the case of opposite direction between body rotation and visual image rotation, the estimated magnitude of a body rotation increased with the acceleration of visual image when the vestibular acceleration was between 0.1deg/s^2 and 1.0deg/s^2. These experimental findings can be used to develop a simulator or a display which can effectively produce a rotational sensation of the body.
2005-06-01