Fig. 4 | Scientific Reports

Fig. 4

From: The effects of non-invasive transcutaneous auricular vagus nerve stimulation on resting-state delta oscillation: a randomized, double-blinded, sham-control trial

Fig. 4

Topographic distribution of scalp plots in resting-state EEG: (a) theta power (4 to 7.9 Hz, range 35 to 40 dB, 10 x log10); (b) alpha power (8 to 12.9 Hz, range 35 to 40 dB, 10 x log10); and (c) beta power (13 to 29.9 Hz, range 23 to 29 dB, 10 x log10). The y-axis represents the groups: sham (top) and active (bottom). The x-axis represents the timeline: pre-intervention (left) and post-intervention (right).

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