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EEG (Electroencephalogram) Information
Your doctor has recommended that you have an electroencephalogram (EEG). An EEG may also be called a brain wave test. This pamphlet is to explain the test and to answer questions you might have.
An EEG helps in the diagnosis of numerous conditions relating to the brain. It is similar to an EKG or Heart Test, but it is done on the head.
An EEG takes approximately one hour. Small wire electrodes are placed on the scalp with a white cream. You will be resting in a reclining chair in a dark and quit room during recording. The white cream is washed off with warm water after the test.
A chart is made of small electrical signals from the brain which are recorded from the scalp. These signals are recorded on paper by the EEG machine, then studied and interpreted by a specialist. The report is sent to your doctor.
ANSWERS TO QUESTIONS THAT YOU MAY HAVE:
Q: Will this hurt or have any sensation?
A: No, there is no sensation at all. This is done on newborn babies.
Q: Why was I instructed to come in tired?
A: The Brain waves are recorded while you are resting quietly. The waves normally change with drowsiness and sleep. A complete record should include these changes from waking through drowsiness and sleep.
Q: Does the EEG do anything to the brain?
A: NO. The machine only records signals from the brain; nothing is done to the brain.
Q: May I eat and/or take my medicines beforehand?
A: Eating is fine. You may also continue your usual medicines unless instructed otherwise by your doctor. We will, however, be asking what medicines you do take.
Q: Will I be able to drive alone after the test
A: Yes, unless your doctor has ordered a sedative medication to obtain a sleep test, in which case a
family member of friend should drive you home.
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