3.3. taVNS Effects on the Resting-State α Oscillations
For the close-eye resting state, there was a widespread decrease in the PSD for high-α oscillations (i.e., ~11 Hz) after taVNS but not after the control intervention (see For the close–open resting state, neither the post–pre PSD difference of low-α oscillations nor that of high-α oscillations was significantly different between the two groups (all electrodes 