Friday, May 16, 2025 If you or a loved one is undergoing long-term, overnight EEG, it's natural to have questions about what this test is and why it's important. An electroencephalogram (EEG) is a safe, pain-free test that records the electrical activity of your brain. Even while you sleep, your brain is busy producing electrical signals (brain waves). Many abnormalities of the brain function can be detected during sleep. EEG monitoring during sleep can reveal im-portant clues about your brain's health by tracking these signals and highlighting any abnormal brain waves. In this patient-friendly guide, we'll explain how sleep EEG monitoring works, why it's done, and what to expect.
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