EEG refers to electroencephalogram test. It is a non-invasive test that records electrical patterns in your brain. This test used to find the problems related to electrical activity of the brain. EEG Test generally used to help diagnose conditions like head injuries, dizziness, headaches, sleeping problems etc. The procedure for EEG Test, A small metal discs with thin wires are placed on the scalp and then transfer the signals to a computer to record the electrical activity. For EEG Test wash your hair the night before the EEG Test, don’t put any products in your hair on the day of the test and also avoid the eating or drinking anything having caffeine for atleast 8 hours before the EEG Test.