The technologist will explain and show your child what will happen during the test. Electrodes (referred to as buttons, with wires) are placed on areas of the child's head using a thick paste, after cleaning each area with a cotton tip.
Your child will need to lie very still with their eyes closed and try to relax. Some children have difficulty laying still for the electrode placement. When this happens, the child may be swaddled or placed on a papoose board during the electrode placement. After the electrode placement is finished, the parents may be able to hold the child. Only two additional persons will be allowed in the EEG testing room. Other visitors are asked to wait in the waiting room.
The electrodes pick up signals about how the brain is working. These messages are sent to a computer which records the activity.
During part of the test, the technologist flashes a bright light in front of the child for 10 seconds approximately nine different times. We may ask your child to breathe deeply for two to three minutes during the test.