Fig. 1
Electrode channel layouts for each electrode density configuration. Schematic layout of the 128-channel EEG montage with subsets used for different electrode density configuration. Colored electrodes indicate the five density levels: 16 channels (red), 32 channels (red and yellow), 64 channels (red, yellow and blue), 96 channels (red, yellow, blue and magenta), and 128 channels (red, yellow, blue, magenta and cyan). Subsets were selected to follow standard low-density EEG configurations and were evenly distributed across the scalp. The black electrode indicates the hard-wired ground (Gnd), and the blue with a yellow outline electrode indicates the reference channel (Ch64).
