FREQUENTLY ASKED QUESTIONS

What is an ambulatory EEG (AER)?
The brain normally produces tiny electrical signals that come from the brain cells and nerves which send messages to each other. These electrical signals can be detected and recorded by the electroencephalograph (EEG) machine. The EEG test is painless and harmless. (The EEG machine records electrical signals coming from your brain - it does not put any electricity into your brain or body.) An extended ambulatory EEG typically lasts for at least 24 hours with the most common studies lasting for 72 hours. During an ambulatory EEG, patients are able to move around fairly freely and go about activities in their home.

How do I know if I need an AER EEG?
Your physician will determine if you need an EEG

 Do I need a physician’s order for an AER?
Yes. A physician’s order is required

 How do I schedule my AER?
Once your physician has determined that you need an extended EEG, he or she will fax an order form to us. We will then contact your insurance and determine your coverage for the test. Once we have received approval from your insurance company, we will contact you to set up the test. This usually happens within one business day. If you have not heard from us, or need to get the study scheduled sooner, please contact as at (262) 241-1701 and someone in scheduling will be happy to help you.

 How long will my AER study run?
The length of the test will be determined by your doctor and is often determined by how often you are having the concerning episodes.

 Is an AER test painful?
The EEG test is painless and harmless. (The EEG machine records electrical signals coming from your brain - it does not put any electricity into your brain or body.) Occasionally, patients may have sensitive areas on their scalp or forehead that we get concerned comments mentioned to us.  If this should occur, please contact us.  If you know that you have sensitive skin, please let the technologist that sets you up with the equipment know this.  Your EEG should be pain free.

 What is involved in the placement of the electrodes/leads/sensors and how do I keep them from falling off?
The placement of leads on your head can take approximately 1 hour or so.  A technologist measures your scalp for specific placements and applies the leads using collodion (a glue-like substance).  Once secure, all leads are wrapped with a gauze material to keep them free from dirt and well protected.  Finally, a netting is placed over the gauze to make it extra secure

 What do I do if during my test, some of the leads come loose? What if my head wrap falls off or comes undone?
If leads loosen or your wrap comes undone, do not worry!  All electrodes are applied as a backup for one another – so if one or two come off, no problem.  If 5 or more leads loosen or come off completely, call our on-call person to discuss options at 262-241-1701.  A loose head wrap can be reapplied by a patient or family member with some direction from our clinical staff.  If the head wrap is too snug, you may have someone very carefully loosen it, but DO NOT take the wrap all of the way off.


If you have any questions that were not on this list, please contact us at (262) 241-1701 or email us at information@aereeg.com