Neurology
EEG (Electroencephalogram)
A painless test that records the brain’s electrical activity, used mainly to diagnose epilepsy and seizures.
An EEG records the electrical activity of the brain using small sensors placed on the scalp. It is painless, involves no radiation, and usually takes 30 to 60 minutes.
Why it is done
- To diagnose epilepsy and classify seizure type
- To investigate blackouts or unexplained loss of consciousness
- To assess confusion, memory problems or suspected encephalitis
- To monitor brain activity in intensive care
How to prepare
Wash your hair the night before and avoid oils or gels. Continue your regular medicines unless your doctor tells you otherwise. You may be asked to sleep less the night before, as tiredness can make abnormal activity easier to detect.
What happens afterwards
There are no after-effects and you can go home straight away. Your neurologist will discuss the report with you at your follow-up appointment.