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  1. Electroencephalogram (EEG) - Johns Hopkins Medicine

    An EEG is a test that detects abnormalities in your brain waves, or in the electrical activity of your brain. During an EEG, electrodes are pasted onto your scalp. These are small metal disks with thin wires. …

  2. EEG (electroencephalogram) - Mayo Clinic

    May 29, 2024 · Brain cells communicate via electrical impulses, and this activity shows up as wavy lines on an EEG recording. Brain cells are active all the time, even during sleep. An EEG is one of the …

  3. Electroencephalography - Wikipedia

    Electroencephalography (EEG) [1] is a method to record an electrogram of the spontaneous electrical activity of the brain. The bio signals detected by EEG have been shown to represent the postsynaptic …

  4. Electroencephalogram (EEG): What It Is, Procedure & Results

    An EEG (electroencephalogram) is a test that evaluates brain function. Healthcare providers order an EEG to diagnose brain issues like epilepsy.

  5. Electroencephalogram (EEG) - Harvard Health

    Mar 22, 2025 · An electroencephalogram (EEG) is a recording of the brain's electrical activity. Metal electrodes attached to the skin on the outside of the head transform electrical activity into patterns, …

  6. EEG (Electroencephalogram): Uses, Procedure, Risks

    Dec 8, 2025 · EEGs can help diagnose conditions like epilepsy and sleep disorders. Electrodes placed on the scalp detect brain waves and send this information to a computer. An electroencephalogram …

  7. Electroencephalogram - StatPearls - NCBI Bookshelf

    An electroencephalogram (EEG) is an essential tool that studies the brain's electrical activity. Despite developing more advanced imaging techniques, EEG remains the essential paraclinical tool for …

  8. EEG Test (Electroencephalogram): Purpose, Procedure, and Results - WebMD

    Dec 18, 2023 · An EEG is a test that helps your doctor diagnose brain disorders like epilepsy or a sleep disorder. You can have it in a doctor's office, a sleep lab, or at home.

  9. EEG Procedure - Simply Psychology

    Jun 12, 2025 · An EEG (electroencephalogram) records your brain’s electrical activity using painless electrodes placed on the scalp. It measures brainwaves like delta, theta, alpha, beta, and gamma, …

  10. Electroencephalography - Neurologic Disorders - MSD Manual …

    The EEG is examined for asymmetries between the 2 hemispheres (suggesting a structural disorder), for excessive slowing (appearance of 1- to 4-Hz, 50- to 350-muV delta waves, as occurs in …