Hearing the Signal The skull is a very poor conductor of electricity; it tends to “smoosh” (to use a technical term) the EEG from a fairly broad area–about 10 square centimeters of brain surface.  That’s one reason why it’s not absolutely critical to be in an exact site to train a specific area of the brain. Also, neurons tend to work in pools (like synchronized swimmers), so we aren’t really looking at the summed results of a bunch of individual […]