An electroencephalogram (EEG) is a test used to find problems related to electrical activity of the brain. An EEG tracks and records brain wave patterns
Electroencephalogram (EEG): The electroencephalogram is most often used to help in the diagnosis of seizure disorders. This may also be used to monitor the effectiveness of anti-seizure medications in patients with epilepsy. Other problems which are evaluated with an EEG may include unusual spells, confusion, head injury or other disorders which cause worsening mental impairment or brain dysfunction.
An electroencephalogram (EEG) involves recording of the brain's electrical activity. During the test, you will sit in a comfortable chair and small metal electrodes are applied to the scalp. A special gel will help the electrodes stay in place and help record your brain waves more efficiently. The electrical activity of the brain is detected and recorded onto a specialized computer. These patterns are typically referred to as "brain waves." The examination typically takes between 30-90 min.
During the course of the evaluation, the technologist may ask you to perform some simple activities such as breathing quickly and deeply and possibly looking at a strobe light. In some cases, you may fall asleep during the study. A video monitor will be attached to the computer as well to record any physical spells or seizures.
In preparation for your EEG, we do ask that the hair being washed the night before the test and that you do not apply oily preparation such as hairspray.
There are no risks to the test. Your neurologist will review the tracings and prepare a report in a few days.
A prolonged (or 12 hour) electroencephalogram (EEG) may be performed under certain circumstances. This is similar to the routine EEG described above. This may be requested in circumstances where the nature of certain spells (or seizures) are not clear.
The study is performed in a similar manner to the routine EEG described above. In this case however you will remain in the office for a period of 12 hours while the recording takes place.
Our technologist or nurse will be close by should any changes occur. During that time, you may watch TV, read a book or perform other quiet activities. We will be able to provide snacks and drinks during the course of the study.
No special preparation is necessary except as described above. There are no after effects from this type of examination.
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