An Efficient Framework for EEG Analysis with Application to Hybrid Brain Computer Interfaces Based on Motor Imagery and P300

Figure 1

Paradigm for acquisition of data in a trial. At the beginning of the trial (0–2.25 s), the screen is blank. From 2.25 to 4 s a cross is shown onscreen to capture subject’s visual attention. From 4 to 8 s, an arrow cue is provided. The subject is instructed to perform a mental task according to the following: right arrows cue right-hand motor imagery and up arrow cues attention to a specific button (center up button in this experiment).