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Abstract
Recent results are reviewed describing the behavior of extraocular muscle motoneurons in the alert, behaving monkey during a variety of eye movements, namely, saccades, fixation, pursuit and vergence movements, and vestibular stabilizing movements. Combining this with recent results on the behavior of vestibular neurons, it is possible to present a fairly complete picture of the neuronal arrangement of the vestibulo-ocular reflex. It is proposed that this phylogenetically old motor apparatus used for stabilizing the visual axes is utilized by the visual system in stabilizing retinal image slip and making smooth pursuit and saccadic eye movements. Consideration is given to the types of neural networks needed to transform visual information into oculomotor commands.