What is an electroencephalogram (EEG)?
An EEG is a noninvasive test that measures your brain’s electrical activity. During the test, your provider places electrodes on your scalp that monitor and record brainwave activity.
Abnormalities in brain waves may signify epilepsy or a seizure disorder. The neurologists at Knight Neurology have additional training in epilepsy and clinical neurophysiology, which is vital for diagnosing seizures and epilepsy.
Who needs an EEG?
Your neurologist at Knight Neurology explains to you why you need an EEG. In most cases, the neurologists perform the diagnostic test to confirm or rule out epilepsy or a seizure disorder.
In addition to diagnosing seizures, an EEG also helps your neurologist determine the type of seizure activity you have: generalized or focal seizures.
Generalized seizures occur when you have abnormal brain activity on both sides of your brain simultaneously.
Focal seizures cause abnormal brain activity in one part of the brain, which may then spread to other regions.
The neurologists at Knight Neurology may also recommend an EEG test if you have dementia or a sleep disorder.
How do I prepare for an EEG?
Your neurologist provides you with specific instructions on how to prepare for your EEG. Caffeine may affect the results of your EEG, so they may request you avoid caffeine for at least a day before your test.
Your neurologist may also ask you to stop taking your anti-seizure medication shortly before your EEG.
What happens during an EEG?
Knight Neurology performs EEG testing at the office. While you sit or lie back on the comfortable exam chair, a technician places the electrodes on your scalp.
Once the electrodes are in place, you close your eyes and relax, and your neurologist starts to record your brain wave activity. Your neurologist may flash a light in your eyes or ask you to inhale and exhale deeply during the EEG to activate certain areas of your brain.
Your neurologist might record your brain wave activity for up to two hours.
What happens after an EEG?
After your EEG, you go home and resume your usual activities. Your neurologist evaluates your EEG recording and generates a report. Then, you return to the office so your neurologist can discuss the findings with you and make recommendations.