What to Expect During an EEG Test: A Complete Patient Guide
If your neurologist has recommended an electroencephalogram (EEG), you may have questions about what to expect. This non-invasive test is one of the most valuable tools for diagnosing neurological conditions, and understanding the process can help ease any anxiety.
What is an EEG?
An EEG measures electrical activity in your brain using small electrodes attached to your scalp. These electrodes detect brain waves and transmit them to a computer, creating a visual record that your neurologist can analyze.
Preparing for Your EEG
- Wash your hair: Clean hair helps electrodes adhere properly. Avoid styling products.
- Sleep considerations: Your doctor may ask you to reduce sleep the night before to capture drowsy brain activity.
- Medications: Continue taking prescribed medications unless otherwise directed.
- Avoid caffeine: Skip coffee and caffeinated beverages for at least 8 hours before the test.
- Eat normally: Low blood sugar can affect results, so don't skip meals.
During the Test
The test typically takes 30-60 minutes:
- A technician will measure your head and mark electrode positions.
- Small electrodes are attached using a paste or gel.
- You'll be asked to relax with your eyes closed, then open them.
- You may be asked to breathe deeply or look at flashing lights.
- The test is completely painless.
Understanding Results
Your neurologist will review the EEG recording and discuss findings with you. The test can help diagnose epilepsy, sleep disorders, brain injuries, and other neurological conditions. At Inland Empire Brain Experts, Dr. Salim personally interprets all EEG results and provides comprehensive explanations during your follow-up visit.