How an EEG is carried out

There are several different ways an EEG recording can be taken. The clinical neurophysiologist will explain the procedure to you andcan answerany questions you have.You'll also be asked whether you give permission (consent) for the various parts of the test to be carried out.

Before the test starts, your scalp will be cleanedand about 20 small sensors calledelectrodes will be attached using a special glue or paste. These are connected by wires to an EEG recording machine.

Routine EEG recordings usually take 20 to 40 minutes, althougha typical appointment willlast about an hour, including some preparation timeat the beginningand some time at the end. Other types ofEEG recording may take longer.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018