Except for foods or beverages containing caffeine, you do not need to restrict food or fluids before the test. Eat a small meal shortly before the test because low blood sugar may produce abnormal test results. You may be asked not to take this medication before the test. Do not take any anti-convulsants, tranquilizers, barbiturates or other sedatives for 2 to 4 days before the test. Needle electrodes cause mild, temporary pain when inserted.
Discomfort disappears when the test is finished.
Equipment used Electroencephalograph and recorder. Electrodes with leads. Description of test You relax in a reclining chair or lie on a bed while electrodes are attached to your scalp. Electrodes will not shock you. If needle electrodes are used, you'll feel a prickling sensation when they are inserted into your scalp.