![]() You relax in a comfortable position with your eyes closed during the test. ![]() Testing for certain conditions requires you to sleep during the test. Once the electrodes are in place, an EEG typically takes between 20 and 40 minutes. ![]() The electrodes are connected with wires to an instrument that amplifies the brain waves and records them on computer equipment. Sometimes, an elastic cap fitted with electrodes is used instead. These spots on your scalp might be scrubbed with a gritty cream to improve the quality of the recording.Ī technician attaches discs (electrodes) to your scalp using a special adhesive.
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