Epilepsy testing primarily focuses on identifying abnormal brain activity associated with seizures. A key diagnostic tool is the Electroencephalography (EEG).
Electroencephalography (EEG)
What is an EEG?
An EEG is a test that measures electrical activity in the brain. It uses small sensors (electrodes) attached to the scalp to detect brain waves. These waves help doctors understand how the brain is functioning.
How is an EEG performed?
- Preparation: The patient's scalp is cleaned, and electrodes are attached with a special paste.
- Recording: The electrodes record the brain's electrical activity over a specific period.
- Analysis: The recorded activity is displayed as wave patterns that can indicate epilepsy.
What can an EEG show?
- Abnormal Electrical Activity: EEGs can detect abnormal brain waves associated with seizures, even between seizure events.
- Seizure Types: The patterns in the EEG can help clinicians determine the types of seizures a patient is experiencing.
- Seizure Origins: An EEG can pinpoint the area of the brain where seizures originate, aiding in treatment planning.
EEG Duration
The duration of an EEG can range from a few minutes to a couple of hours, depending on what information is needed to make a diagnosis.
| Test | Description | Information Gathered |
|---|---|---|
| Electroencephalography | Measures the brain's electrical activity using electrodes placed on the scalp. This is a non-invasive test. | Detects abnormal brain waves, seizure type, and seizure origin. |
Other Tests for Epilepsy (Not from reference)
While the EEG is critical, other tests may be used in conjunction:
- Neuroimaging: MRI or CT scans of the brain can help identify structural abnormalities contributing to seizures.
- Blood Tests: These can rule out other medical conditions that might cause seizures.
- Video EEG: This test combines EEG with video recording to capture seizure events and their associated brain activity.
Final Note
Determining the cause of seizures requires a comprehensive approach combining an EEG with a patient's medical history and other pertinent diagnostic tests.
