Now we will position the first two of our four EEG electrodes which will measure brain electrical activity overnight.

​Take another two of the gold-cup electrodes and prepare it in the same manner as the others so far.

​Tape the electrode down to the prepared area just below the hairline on the top left of the participant’s forehead, with the tape and the wire running diagonally down along the temple.

Insert the plug into the red F3 port (the 3rd input in from the front right of the headbox).

Repeat this process for the prepared area on the participant’s upper right forehead.

Plug this electrode into the red F4 input which is 3rd in from the front left of the headbox.

It may be that this tape overlaps the right eye electrode that we positioned earlier. This will not be a problem.