During an EEG, small electrodes and wires are attached to your head. The electrodes detect your brain waves and the EEG machine amplifies the signals and records them in a wave pattern on graph paper or a computer screen Fig. An EEG measures electricity that your brain makes; it does NOT measure thoughts or feelings, and it does not send any electricity into your brain.
It is most often used to determine the type and origin of seizures. For example, if you have a seizure disorder , the EEG can show where abnormal activity in your brain comes from and can help distinguish between generalized or focal seizures. An EEG is of value for diagnosing epilepsy only if it detects patterns typical of epilepsy.
EEG can also detect abnormal brain waves after a head injury, stroke, or brain tumor. Other conditions such as dizziness, headache, dementia, and sleeping problems may show abnormal brain patterns. A technician can perform the test in the doctors office, a specially designed clinic, or in the hospital. You will be asked to lie on a table or sit in a reclining chair.
Arrange to have someone drive you home. Once home, rest and don't drive for the rest of the day. Your doctor might schedule an office appointment to discuss the results of the test. If possible, bring along a family member or friend to the appointment to help you remember the information you're given. Explore Mayo Clinic studies of tests and procedures to help prevent, detect, treat or manage conditions. Our patients tell us that the quality of their interactions, our attention to detail and the efficiency of their visits mean health care like they've never experienced.
See the stories of satisfied Mayo Clinic patients. Janice Breien was anxious to find a better way to manage the seizures that regularly disrupted her daily life. Enter her Mayo care team -- ready to listen and provide solutions. Now, with her seizures under control, Janice has a renewed sense of optimism.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. This content does not have an English version. This content does not have an Arabic version. Request an Appointment at Mayo Clinic. EEG electrodes Open pop-up dialog box Close. Fresh Approach to Epilepsy Treatment Rekindles Zest for Life Janice Breien was anxious to find a better way to manage the seizures that regularly disrupted her daily life.
Share on: Facebook Twitter. Show references Moeller J, et al. Electroencephalography EEG in the diagnosis of seizures and epilepsy. Accessed Feb. Still, having electrodes pasted to the scalp can be a little stressful for kids, as can lying still during the test. A neurologist a doctor trained in nervous system disorders will read and interpret the results.
Though EEGs vary in complexity and duration, results usually are available in a few days. EEGs are very safe. If your child has a seizure disorder, your doctor might want to stimulate and record a seizure during the EEG. A seizure can be triggered by flashing lights or a change in breathing pattern. You can help prepare your child for an EEG by explaining that it won't be uncomfortable. You can describe the room and the equipment that will be used, and reassure your child that you'll be right there for support.
For older kids, be sure to explain the importance of keeping still while the EEG is done so it won't have to be repeated. If you have questions about the EEG procedure, speak with your doctor.
You can also talk to the EEG technician before the exam. Reviewed by: KidsHealth Medical Experts. Larger text size Large text size Regular text size.
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