Abstract
The optic vestibular coordination, by utilizing the optokinetic and labyrinthine stimulations, was investigated in the squirrel monkey subjects. Simultaneous labyrinthine stimulation (subliminal) facilitated the slow phase eye-speed of optokinetic nystagmus. The optokinetic adaptation limit was elevated, in this instance, and the speed of retinal nystagmus was improved. In other words, the presence of simultaneous vestibular stimulation possibly stabilized the retinal image of a faster moving target. Therefore, the concept; the vestibular system has a physiological role in assisting the stabilization of retinal image, was confirmed.The methamphetamine administration also facilitated the slow phase eye-speed of optokinetic nystagmus.
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