Some patients with epilepsy or their family members worry that having an EEG will stimulate the human brain, especially if the test is repeated, and often fail to actively cooperate with the doctor in carrying out the test. This concern is unnecessary. In fact, there is no difference between an EEG and a blood pressure test, which is performed with a stethoscope. EEG is actually a recording of the human brain’s own electrical waves amplified. Because the electrical waves of the human brain are extremely weak, measured in microvolts (μV), and have to be recorded with an instrument that is amplified millions of times to be seen, an EEG is much more complicated than a blood pressure monitor or a doctor’s stethoscope. The general examination of EEG is not to impose some kind of unacceptable adverse stimulation, much less to electrify a person, and therefore, there will be no stimulation of the human brain. Some patients abroad have had dozens of EEG examinations in a row, and some have even been monitored for more than ten days, which shows that EEG examinations are harmless to the human brain.