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. Author manuscript; available in PMC: 2018 Sep 11.
Published in final edited form as: IEEE Access. 2017 Sep 11;5:18756–18764. doi: 10.1109/ACCESS.2017.2751069

Fig. 1. Experimental design.

Fig. 1

A. Trial structure for cursor movement BCI control using left vs. right-hand or both-hands vs. relaxation motor imagery. B. Experimental procedure during each session for group one: BCI control before soft drink ingestion, resting state EEG acquiring with eyes open and closed intermittently right after soft drink administration, and BCI control when caffeine effects are approximately maximum after soft drink ingestion. C. Similar Experimental procedure for group two with a fourth session in which regular coffee was offered to the participants.