Abstract
Experiments were conducted to evaluate the role of the vestibulocerebellum in the production of visual-vestibular-oculomotor reflexes in rabbits. Oculomotor responses (nystagmus) were compared with optokinetic, vestibular, and combined visual-vestibular stimuli obtained before and after surgical removal of the right flocculus, paraflocculus, and paramedian lobes. Nystagmus responses with slow components directed toward the side of the surgical lesion were stronger than those in the opposite direction for each of the stimuli used. The vestibulocerebellum appears to facilitate the production of visual-vestibular-oculomotor responses in increasing the gain of the contralaterally directed oculomotor reflexes.
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