Figure 2. The self-applicable electrode set used in this study.

The electrode set, worn by one of the authors (T.M.) in the image to the right, consists of two sets of bipolar masseter electromyography electrodes (MassR x2, MassL x2), four electroencephalography electrodes (Af8, Fp2, Fp1, Af7), two electrooculography electrodes (F8, F7), three chin electromyography electrodes (SF, S1, S2), two electrocardiography electrodes (ECG1, ECG2), and two reference electrodes (T10, T9).