What is the purpose of an Epilepsy Monitoring Unit (EMU)?
A routine EEG provides a 20- to 40-minute sample of brain electrical activity, which is often sufficient. An admission to the hospital with EEG monitoring, on the other hand, can record days of EEG activity!

Why do I need the test?
Your doctor may order an EMU admission for you for a number of reasons:

• Distinguish fainting spells from seizures.
• To quantify the number of abnormal discharges or seizures in patients with epilepsy.
• Evaluate periods of unconsciousness or memory loss.
• Monitor how effective medications are.
• Study events that occur sporadically.                           

How is the test done?

You will be cared for by a number of different staff during your stay in the Monitoring Unit. Feel free to ask questions of any of us. A nurse will orient you to the area and will conduct an admission interview with you.

Then the EEG technologist will attach 16 to 26 flat metal discs called electrodes to different places on your head, using special glue called collodion to keep them in place. The electrodes are connected by wires to a small recorder that amplifies and records the electrical activity inside the brain.

There is an “event” button for patients to press if they experience any of the symptoms for which they are being tested, such as episodes of feeling “spacey” or confused. A family member should press the button if the patient is unable to do it.

When your monitoring is complete, the doctor will discuss the findings with you and your family, explaining whether further diagnostic tests are needed and what treatment is best for you.

The EEG technologist will remove the electrodes from your scalp with acetone or a similar solution at the end your stay. You still may wish to wash your hair when returning home to remove any remaining glue.

An EMU admission may last anywhere from 2-5 days.