Cerebellar Contribution to Oculomotor Function

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Abstract
Normal juvenile rhesus monkeys [Macaca .mu.ulatta] (38) were used to study cerebellar contribution to oculomotor function. Gaze nystagmus was seen only after bilateral flocculus lesions. Spontaneous nystagmus was observed after nodulus, flocculus and cerebellar nuclei lesions. OKN [optokinetic nystagmus] was severely impaired after bilateral flocculus and nodulus lesions. It was slightly impaired after dentate nucleus lesions in a long-term observation. It is interesting that OKN is severely impaired after destruction of the flocculus and nodulus, which have a very important role in the visual fixation.

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