An electroencephalogram (EEG) test involves the recording and analysis of electrical signals generated by the brain. There are two types of EEGs that a doctor may order: routine and sleep-deprived.

What you should know

Before your visit

For a routine or sleep-deprived EEG:

Shampoo your hair on the morning of the test. Do not use gel, mousse, sprays, etc. Bring all current medications with you. Have meals as usual but exclude caffeinated products. Caffeine products include coffee and tea (decaffeinated and caffeinated), chocolate, cocoa, pop, energy drinks and any medication or supplements that may have caffeine.

For a sleep-deprived EEG:

Adults and children over 12 years of age must stay awake (for the entire night before the test) from midnight before your test. You should book children 12 months to three years during their naptime. Four to eight year olds should be awake from 4 a.m., nine to 12-year-olds from 2 a.m.

Care providers

An electroencephalogram is performed by an EEG technologist.

Frequently Asked Questions

How long will the test take?

The test will take between 60 and 90 minutes.

Are there any side effects to this test