How is an EEG recorded?

Before the test, a technologist will obtain a thorough history. The patient’s head will be measured and marked so that approximately 25 electrodes can be applied to the scalp.

In most cases, the electrodes are applied with a special tape that is easily removed when the test is finished.

Once the electrodes have been applied, the patient lies on a bed and the test can begin. During the study, the patient may be asked to perform a deep breathing exercise, look at a flashing light or even take a short nap.

When the test has been completed, the patient’s scalp is cleaned.