What Is an EEG Test?

An EEG test, or “electroencephalogram”, is a test that measures electrical activity in the brain. An EEG test produces a readout that graphs the oscillating frequencies of these electrical activities. By looking at these oscillations, physicians can identify abnormalities in order to assess and diagnose a variety of neurological issues. 

What is an EEG Test Used For? 

An EEG test can be a crucial diagnostic tool for many neurological disorders.

·         EEG tests can be used to distinguish between different types of seizures. For example, if a patient appears to have absence seizures, there are certain distinct brainwave patterns in an EEG that a neurologist can look for to determine whether they are “typical” or “atypical” absence seizures.

·         EEG tests are helpful in diagnosing sleep disorders. Different types and stages of sleep produce distinct patterns on EEGs.

·         During surgery, EEG patterns can be used to identify the depth of anesthesia.

·         In patients who are comatose or in a vegetative state, EEG patterns can assess the level of consciousness. This is also important in the context of declaring brain death, which determines whether or not a patient will be kept alive artificially. 

How is an EEG Test Performed? 

An EEG test is carried out in a hospital, laboratory, or doctor’s office. It is a painless, noninvasive procedure.

The patient reclines or lies on their back. Electrodes are attached to the scalp using a special conductive adhesive gel. The electrodes are connected by wires to a machine that records the electrical activity, which is charted as waves on a computer-like screen. Sometimes the electrodes are attached to one another via a cap or net.  

How Do I Prepare for My EEG Test? 

-          Wash your hair the night before your EEG test is scheduled. Refrain from using conditioner, oils, or leave-in products.

-          If you have hair extensions, ask the nurse about specific instructions.

-          Your physician may ask you to stop using one or more of your medications prior to the test.

-          Avoid caffeine for at least 8 hours prior to the test.

-          If you are going to need to sleep during the EEG test, you may be asked to reduce your amount of sleep the night before.

An EEG test is a safe, painless, noninvasive procedure that uses electrodes placed on the scalp to measure electrical activity in the brain. This information can be used to assess and diagnose various neurological and sleep disorders. 

BIOFEEDBACK EEG THERAPY