Variation of Spontaneous Ocular and Occipital Responses with Stimulus Patterns*†

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Abstract
Stabilized-image experiments have demonstrated that the changes of retinal stimulation which are produced by spontaneous eye movements are necessary to maintain vision. They suggest the hypothesis that each saccadic eye movement is followed by electrophysiological response. This report describes a method for recording such responses at the eye and at the brain and summarizes some of their properties. Steadily illuminated gratings of selected degrees of coarseness are used as stimuli. Activity from the eye and the occipital scalp is fed to an average-response computer which is triggered by involuntary saccadic eye movements. The amplitudes of the responses obtained at both recording sites are dependent upon stimulus luminance and grating pattern. Very fine or very coarse gratings are less effective than those of moderate spatial frequency.

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