About EEG (Electroencephalography)
An electroencephalogram (EEG) records the electrical activity of the brain using small electrodes placed on the scalp. It is painless and is one of the most important tests for diagnosing epilepsy and understanding the type of seizures.
EEG is also used in evaluating unexplained episodes of altered consciousness, encephalopathy and certain sleep-related problems.
Also known as: Brain wave test, electroencephalogram
Who is it recommended for?
Your doctor may recommend this if you have:
- Suspected epilepsy or seizures
- Unexplained fainting or blank spells
- Confusion or altered consciousness
- Monitoring brain function in critically ill patients
How is it done at AKG Hospital?
- Electrode placement Small electrodes are attached to the scalp with a paste.
- Recording You rest with eyes closed; recording usually lasts 20–40 minutes.
- Activation You may be asked to breathe deeply or look at a flashing light.
- Report A neurologist interprets the recording.
How to prepare
- Wash hair the night before; avoid oil, gel or spray
- Continue regular medicines unless told otherwise
- Sometimes a sleep-deprived EEG is requested — follow instructions
Recovery & aftercare
You can return to normal activities immediately. Wash the paste off your hair at home.
Benefits
- Painless and safe
- Key test for epilepsy diagnosis
- Guides choice of treatment
Risks & when to seek help
EEG is safe. Rarely, flashing light or deep breathing may trigger a seizure in susceptible people, and staff are trained to manage it.
Frequently asked questions
Does EEG give an electric shock?
No. EEG only records the brain's natural electrical activity.
Can a normal EEG rule out epilepsy?
Not always. A normal EEG does not exclude epilepsy; the diagnosis is based on the clinical history along with tests.
This page gives general information to help you understand EEG (Electroencephalography). It does not replace a consultation — your doctor will advise what is right for you.
