Summary Read the full fact sheet. On this page. Conditions diagnosed by EEG Normal brain waves occur at a rate of up to 30 per second, but in someone with epilepsy, for example, the EEG may show bursts of abnormal discharges in the form of spikes and sharp wave patterns.
Other conditions that may be diagnosed with the aid of an EEG include: Sleep disorders such as narcolepsy Head injuries Brain infection Brain haemorrhage Alzheimer's disease Degeneration of brain tissue Metabolic conditions that affect brain tissue Hormonal conditions that affect brain tissue Certain disorders of the central nervous system Stroke Brain tumour Brain death. Medical issues to consider An abnormal EEG doesn't automatically mean that you, for example, have epilepsy.
EEG procedure Your hair must be thoroughly clean, but most importantly dry. Immediately after the EEG Once the test is complete, the electrodes are removed and you are allowed to get up. Taking care of yourself at home EEG is a safe procedure. Long-term outlook The EEG technologist can't interpret the test results on the spot.
Other diagnostic tests Other diagnostic tests depend on the condition under investigation. Where to get help Your doctor Neurologist Things to remember The electroencephalogram EEG is a medical test used to measure the electrical activity of the brain. A number of electrodes are applied to your scalp. EEG can help diagnose a number of conditions including epilepsy, sleep disorders and brain tumours. Give feedback about this page. Was this page helpful?
Yes No. View all medical tests. Related information. In addition, there is no risk of getting an electric shock. In rare instances, an EEG can cause seizures in a person with a seizure disorder. This is due to the flashing lights or the deep breathing that may be involved during the test. If you do get a seizure, your healthcare provider will treat it immediately. Other risks may be present, depending on your specific medical condition.
Be sure to discuss any concerns with your healthcare provider before the procedure. Ask your healthcare provider to tell you what you should do before your test. Below is a list of common steps that you may be asked to do. An EEG may be done on an outpatient basis, or as part of your stay in a hospital. Procedures may vary depending on your condition and your healthcare provider's practices. Talk with your healthcare provider about what you will experience during your test.
Once the test is completed, the electrodes will be removed and the electrode paste will be washed off with warm water, acetone, or witch hazel. In some cases, you may need to wash your hair again at home. If you took any sedatives for the test, you may be required to rest until the sedatives have worn off. You will need to have someone drive you home. Skin irritation or redness may be present at the locations where the electrodes were placed, but this will wear off in a few hours.
Your healthcare provider will inform you when you may resume any medicines you stopped taking before the test. Your healthcare provider may give you additional or alternate instructions after the procedure, depending on your particular situation. Small metal discs with thin wires electrodes are placed on the scalp, and then send signals to a computer to record the results. Normal electrical activity in the brain makes a recognizable pattern.
Through an EEG, doctors can look for abnormal patterns that indicate seizures and other problems. Most EEGs are done to diagnose and monitor seizure disorders. EEGs also can identify causes of other problems, such as sleep disorders and changes in behavior. They're sometimes used to evaluate brain activity after a severe head injury or before a heart transplant or liver transplant.
If your child is having an EEG, preparation is minimal. Your child's hair should be clean and free of oils, sprays, and conditioner to help the electrodes stick to the scalp.
Your doctor may recommend that your child stop taking certain medicines before the test. It's often recommended that kids not have caffeine up to 8 hours before the test.
Skip to content. What is an EEG? What conditions can be diagnosed using an EEG? Some of the other conditions for which doctors may want to perform an EEG include: head injury; brain tumour; encephalitis inflammation of the brain ; stroke; or sleep disorders.
Doctors can also use an EEG to confirm brain death in someone who is in a coma. How is this test performed? Author: myDr. What is Lyme Disease? What is Hereditary Haemorrhagic Telangiectasia?
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