What it is
An electroencephalogram (EEG) records the brain’s electrical activity through small electrodes placed on the scalp. It is non-invasive, usually painless and does not put electricity into the child. Video EEG records behaviour and EEG at the same time.
Why it may be requested
- Possible seizures, staring or unexplained episodes
- Classifying seizures or an epilepsy syndrome
- Reviewing events that may or may not be epileptic
- Assessing sleep-related events or treatment response when clinically indicated
What to expect
The technologist measures the head and attaches electrodes with paste or adhesive. The child may be asked to open and close their eyes, breathe deeply, look at a flashing light or try to sleep. Video monitoring may be used to match visible events with the EEG.
Approximate duration
A routine study often requires about 60-90 minutes including setup, while prolonged, video or ambulatory recordings may last several hours or one or more days. Follow the appointment-specific time given by the practice.
How to prepare
Wash and dry hair without oil, gel, braids with extensions or styling products. Continue medicines unless the doctor gives different instructions. Bring comfort items and follow any sleep-deprivation instructions exactly.
Sedation considerations
Sedation is generally avoided because it can change sleep and EEG patterns. Natural sleep is preferred when sleep recording is needed. Never give a sedative unless the clinical team has specifically prescribed and arranged it.
Results and reports
A trained clinician reviews the recording after the test. The report is interpreted with the clinical history; the technologist cannot give a result during the recording.