小脳と動眼反射・前庭(半規管)-動眼反射

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Normal rhesus monkeys (38 animals) were used for studies done in an attempt to clarify which parts of the cerebellum are concerned with oculomotor and vestibulo-(cristo-) oculomotor reflexes.Horizontal and vertical eye movements were recorded by platinum needle electrodes using ENG. Before and after making the lesions in the cerebellum, spontaneous nystagmus, gaze nystagmus, optokinetic nystagmus and caloric nystagmus were observed and recorded by ENG. The lesions were made operatively or stereotaxically. After sufficient observations, the animals were sacrificed and the brains were fixed and sectioned. The extent of the lesions was examined histologically.1) The flocculus and the nodulus appear to be concerned with the oculomotor reflex. The dentate nucleus is considered to be a relay nucleus of the flocculo-oculomotor tract.2) The cerebella nuclei, nodulus and uvula are probably concerned with the vestibulo-(cristo-) oculomotor reflex, and act to inhibit this reflex.
耳鼻咽喉科臨床学会の論文