The Electroencephalogram (EEG)<\/strong> is a functional test designed to observe the brain’s electrical activity.<\/span><\/p>\n Electroencephalographic tests may include standard EEG, EEG with sleep test or polygraph EEG in neonates with digital equipment (Grass Telefactor).<\/span><\/p>\n Other tests that use EEG include:<\/span><\/p>\n The EEG can be carried out with the patient awake or asleep, an indication that should be given by the patient’s attending physician. <\/span><\/p>\n When asleep, the patient is instructed to sleep for about half the time they usually do the day before the test, in order to obtain the recording during physiological sleep. Ambulatory EEG (EEGamb)<\/b> is an electroencephalogram carried out with an ambulatory (portable) recorder which is designed to record uninterruptedly for several hours – the usual standard is 24 hours of recording, with 19 electrodes.\n
\nPossibility of examining EEG channels and classifying\/quantifying sleep phases. <\/span><\/li>\n
\nIt is important for diagnosing diseases that cause excessive daytime sleepiness, such as narcolepsy. <\/span><\/li>\n<\/ul>\nHow is it done?<\/h2>\n
\nThe sleep EEG lasts between one and a half and two hours.
\nThe EEG in wakefulness (routine) lasts about an hour (total time including placing and removing the electrodes). <\/span><\/p>\n
\nThe patient is connected to the recorder and can go home or to their usual work.
\nPreparation of the head by the technician takes longer as the electrodes are placed one by one with an appropriate glue.
\nThe patient can and should maintain activities as close to normal as possible during the recording day(s).
\nThe electrodes are removed in the laboratory at the end of the examination.
\nThe EEGamb is usually carried out on patients who have already had a routine EEG or even an EEG with a sleep test carried out previously.
\nYour doctor will know which type of test is right for you. <\/span><\/p>\n