Electroencephalogram (EEG)

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Electroencephalogram (EEG) is a test used to look at the electrical activity in the brain.

An EEG may be done to:

  • Help diagnose seizures
  • Assess if brain function has been affected by certain conditions and diseases, such as:
    • Trauma
    • Coma
    • Brain infection— encephalitis
    • Electrolyte imbalance

At UVA, our labs are ABRET-accredited, a recognition given to programs that meet certain technical standards and demonstrate quality output.

What to Expect of an EEG

The painless test takes about 1 to 1.5 hours. In some cases, your doctor will need you to do an EEG overnight or over a number of days. The test may be done at home or in the hospital.

EEG Results

Your doctor will get a report within 1-2 weeks and will talk to you about the results.