7th Annual Meeting of the International Multisensory Research Forum
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Akira Suetsugu

The effect of delaying the onset of a visual target on time course of the apparent displacement of the oculogyral illusion
Poster Presentation

Akira Suetsugu
Graduate School of Business Administration, Kobe University

Taku Konishi
Depertment of Psychology, Kobe University

     Abstract ID Number: 152
     Full text: Not available
     Last modified: March 19, 2006
     Presentation date: 06/19/2006 10:00 AM in Hamilton Building, Foyer
     (View Schedule)

Abstract
We examined the effect of delaying the onset of a visual target after vestibular stimulation on the apparent displacement of the oculogyral illusion (OGI) that is a visual illusion caused by vestibular stimulation. In the dark room, participants performed a pointing task to a visual target for 100 s after vestibular stimulation provided by the cessation of constant rotation (72 deg/s, 8 revolutions) around the Z axis. The onset of the visual target was just after the rotations was stopped (no-delayed condition), or 20 s after that (delayed condition). We also measured baseline without vestibular stimulation. In the no-delayed condition, the visual target was localized near baseline at the onset of the task and the apparent displacement increased for about 20-24 s. The same characteristics were observed in the delayed condition although vestibular signal to cause the apparent displacement had changed during the delay period. These results suggest that time course of the apparent displacement of the OGI is not only a function of time after vestibular stimulation and the timing of the onset of the first visual input after vestibular stimulation have an effect on the visual-vestibular integration process of visual target localization.

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