What is an EEG?
Electroencephalography (EEG) is a non-invasive test that measures electrical activity in the brainthe brain using electrodes placed on the scalp. It records the brain's electrical signals, known as brain waves, to detect abnormalities in brain function. EEGs are particularly useful in diagnosing and monitoring conditions that affect brain activity and mental health.
How it's Performed
Preparation
- Skin Preparation: The scalp areas where electrodes will be placed are cleaned to ensure good contact.
- Electrode Placement: Small, flat metal discs (electrodes) are attached to your scalp with adhesive or a special cap.
During the Procedure
- Recording: You will sit or lie still while the machine records your brain's electrical activity. The process is painless.
- Tasks: You may be asked to perform certain tasks, such as breathing deeply or looking at a flashing light, to record brain responses.
- Duration: Typically takes 30 to 60 minutes, but extended monitoring can last several hours or overnight.
Post-Procedure
- Immediate Analysis: The results are usually available immediately, allowing for quick assessment by the healthcare provider.
- Image Analysis: The EEG recordings are analysed by a neurologist or trained healthcare provider. They look for irregularities in brain wave patterns. This analysis is compiled into a report and shared with your doctor.
Who Can Have One?
Safe for all ages, including children and adults.
- Contraindications: There are no significant contraindications for EEGs as they are non-invasive and safe.