What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Moving too much.
- Taking some medicines, such as those used to treat seizures (antiepileptic medicines) or sedatives, tranquilizers, and Reference barbiturates Opens New Window.
- Not eating before the test.
- Drinking coffee, soda, tea, or other foods that contain caffeine before the test.
- Being unconscious from severe drug poisoning or a very low body temperature (hypothermia).
- Having hair that is dirty, oily, or covered with hair spray or other hair preparations. This can cause a problem with the placement of the electrodes.
|By:||Reference Healthwise Staff||Last Revised: Reference May 8, 2012|
|Medical Review:||Reference Anne C. Poinier, MD - Internal Medicine
Reference Colin Chalk, MD, CM, FRCPC - Neurology