Figure 2 | Scientific Reports

Figure 2

From: Development of an electrooculogram-based human-computer interface using involuntary eye movement by spatially rotating sound for communication of locked-in patients

Figure 2

Two types of horizontal EOG waveforms. Each horizontal EOG waveform was assigned into one of two types based on the presence (Type 1, upper figure) and absence (Type 2, lower figure) of a peak at the very beginning of the task. Note that these data were plotted using averaged clockwise or counter-clockwise horizontal EOG waveforms of H3 (upper) and H1 (lower). The green vertical line in each figure represents the minimum horizontal eye movement duration (1.17 s in this study).

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