An electroencephalogram (ee-leck-tro-en-SEFF-a-lo-gram) or EEG uses small button-shaped electrodes on the outside of the scalp to record the brain’s electrical activity or brain waves. These brain waves are the way brain cells talk to one another and get information from the brain to the rest of the body. An EEG gives doctors a record of that activity by recording it onto a computer or printing it out on a piece of paper.
An EEG helps doctors understand what is happening inside the brain. It can help doctors:
- Tell if a child’s level of alertness or consciousness is normal.
- Point out something that is not normal in one part of the brain.
- See if a child has a tendency to have seizures or convulsions.
- See if a child may have a certain kind of epilepsy.
Sometimes a child who has been having seizures may have a normal EEG. That is because the problem causing the seizures may come and go. When that is the case, the doctor may want to do another EEG, a longer EEG or a video EEG.