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. Author manuscript; available in PMC: 2017 Nov 1.
Published in final edited form as: Brain Stimul. 2016 Jul 15;9(6):834–841. doi: 10.1016/j.brs.2016.07.003

Figure 1.

Figure 1

Task design and experimental setup. Experimental session: the subject performs 4 runs of 18 trials before stimulation, undergoes 20 minutes of stimulation and BCI trials, performs 4 runs after stimulation, performs a 13 minute visual oddball experiment with right hand response, and performs 4 runs delayed after stimulation (upper left). Setup of HD-tDCS electrodes (black circles) embedded within the 64 channel EEG cap (upper right). Single trial sequence of events: after the target is presented for 3 seconds, a red ball appears on the screen and moves based on the SMR control signal for a maximum of 6 seconds, and followed by a 3 second inter-trial interval (lower panel).