HealthWise KnowledgeBase
Electroencephalogram (EEG)
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 |
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