An Electroencephalogram (EEG) records the electrical activity of the brain. Our certified technologist will measure the patient’s head and put the electrodes on their scalp with a paste-like substance. During the test, the patient lies on a table (or may remain in a chair) in a dark room, remaining still and relaxed. Sleep is encouraged during the procedure. Often, a strobe light is used as well to record the brain’s response. An EEG usually takes between 30 to 65 minutes.