The effect of 100 Hz EA stimulation of bilateral Feng-Chi acupoints on the epileptic activities. Panels A, B, C and D respectively depict the EEG signals recorded from the naïve rats, the EA group, the pilocarpine group, and the PFS + EA + pilocarpine group, beginning from the dark onset of the dark period. Red lines indicate the time for pilocarpine administration (at the end of the 30-min EA stimulation). The blue boxes represent the epileptiform EEGs. Green arrowheads were the artifacts. The larger amplitudes, with EEG signals less than 2 mV, appeared in panels A, B and C were delta waves, which represent the state of slow wave sleep. Panels E, F, G and H were the enlarged figures which were respectively expanded the time scale from the panels A, B, C and D, and were recorded from the beginning of the dark period.