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. 2015 Oct 29;5:15890. doi: 10.1038/srep15890

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Copyright © 2015, Macmillan Publishers Limited

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(a) Horizontal and (b) vertical eye movements occurred during stimulation. The red, blue, and green lines indicate eye movements produced when a target is the left, middle, and right stimulus, respectively, and the shaded areas of each line represent the standard errors of respective EOG signals. Irrespective of whether visual stimuli are targets or non-targets, eye movements moved to the opposite direction of a visual stimulus are confirmed in horizontal EOGs when left and right stimuli are presented, while dominant vertical EOGs are observed for middle stimuli.