The problem is, however, it's not just the brain that's electrically active, it's also the rest of the body as well as the environment that contains a lot of electrical activity all the time.
הבעיה היא, שלא רק המוח פעיל חשמלית, אלא גם שאר הגוף והסביבה שמכילים הרבה פעילות חשמלית כל הזמן.