In August of 1992, a cousin and I conducted an experiment to actually track a brainstorm IN PROGRESS on an EEG. She helped me get wired up and then I lied down in a darkened room as my cousin took over the controls.  When the EEG was started, everything was normal and running at 100 mV/cm. The odd part was hoping to induce a brainstorm, since most of these are spontaneous. Well, I was able to successfully induce one (no drugs or hypnosis used), and it was about how I would create the sounds of monster pipe organs in my computer room.  During the brainstorm, I was able to "hear" these pipe organs, and I was able to "see" myself standing back and looking at my keyboards and computers in awe, as if "What have I created?". While this was going on, I narrated my thoughts onto a tape recorder as my EEG was being recorded also. After the brainstorm was over, I allowed my mind to just go blank.

    Here are the results using a simple EEG connection. First of all, I had the ground electrode on the left frontal region. The positive electrode was on the right frontal region. The negative electrode was in the occipital region.  When the EEG was started, its ampitude was about 3-5 cm (or about 300-500 mV p-p). When the brainstorm intensified, the reading went off the graph BIG-TIME. However, my cousin forgot to turn down the sensitivity.  Probably about 1 mV/cm would have been about right. When examining the readouts myself after the experiment, the amplitude was so large that it appeared more like a square wave going clear from the top to the bottom of the screen. After the brainstorm was over, the amplitude and waveform nature returned much closer to normal. Later when I was in a "blank" state, my EEG was even smaller than normal. It was probably around 200 mV p-p.