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. 2022 May 20;8(20):eabo1396. doi: 10.1126/sciadv.abo1396

Fig. 3. High-fidelity and long-term EEG recording for hairy scalp by on-skin painted biogel electrodes.

Fig. 3.

(A) EEG alpha rhythms recorded by the painted biogel (top) and commercial EEG paste (bottom). (B) PSDA for EEG signals in (A). (C) EEG signals recorded by the painted biogel in the eyes-open/closed paradigm (top) and the corresponding spectrogram showing clear alpha rhythm in the eyes-closed state (bottom). (D) Long-period EEG alpha rhythms continuously recorded by the painted biogel electrode. Insets show the zoomed-in data segments and their PSDA. (E) Power ratio of EEG alpha signals recorded by the painted biogel electrode and commercial EEG adhesive gel electrode over a duration of several hours. (F and G) EEG signals recorded by the painted biogel and commercial adhesive EEG gel electrodes after 5 hours (F) and their PSDA (G). (H) EEG alpha rhythms recorded by the painted biogel electrode after continuous wearing for 0, 24, 48, and 72 hours. Insets show their PSDA.