Fig. 4: MDME for EEG recording.

a Schematic diagram of portable EEG acquisition system. b Photograph depicting the assembly of the MDME device onto an EEG cap. c Schematic diagram of MDME placement d Time domain waveforms of EOG and EEG signals recorded by MDME. e Frequency domain waveforms of eye movement and alpha wave recorded by MDME. f Time domain waveforms of eye movement and alpha wave signals recorded by Ag/AgCl gel electrodes. g Frequency domain waveforms of EOG and EEG signals recorded by Ag/AgCl gel electrodes. h EOG during open and close eyes. i EEG during wake and rest states.