Development of Single-Channel Hybrid BCI System Using Motor Imagery and SSVEP

Figure 1

The experimental paradigm for (a) MI task, (b) SSVEP task, and (c) hybrid (MI + SSVEP) task. Only one visual target appeared on the screen in a single trial. The gray boxes represent 20 Hz (light gray, left) and 15 Hz (dark gray, right) flickering black/white stimuli for SSVEP induction. The subjects were instructed to perform the tasks constantly while the cues were displayed.

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(b)

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