What is an EEG? |
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By definition, an EEG is an electroencephalogram (EEG) test to detect abnormalities in the
Electrodes: Fine wires that carry electrical activity
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How is an EEG test performed? |
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Brain cells communicate by producing tiny electrical impulses. In an EEG, electrodes are placed on the scalp over specific areas of the brain to detect and record patterns of electrical activity and check for abnormalities. The test is performed by an Registered technologist in a specially designed room that may be in your health care provider's office. You will be asked to lie in a very comfortable reclining chair. The technologist will apply 25 flat metal discs (electrodes) in different positions on your scalp. The discs are held in place with a paste. The electrodes are connected by wires to an amplifier and a digital machine. The recording machine converts the electrical signals into a series of wavy lines that are recorded via the digital equipment. You will be asked to lie still with your eyes closed because excessive movement, can alter the results. You may be asked to do certain things during the recording, such as breathe deeply and rapidly for several minutes or have a bright flickering light flashed at you. |
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How do I prepare for an EEG test? |
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You will need to wash your hair the night before the test. Do not use any oils or sprays on your hair before this test. Your health care provider may want you to discontinue some medications before the test. Do not change or stop medications without first consulting your health care provider. Sometimes it is necessary to sleep during the test, so you may be asked to reduce your sleep time the night before. See Neurology Associates specific instructions!
Infants and children:
The preparation you can provide for this test depends on your child's age, previous experiences, and level of trust. For general information regarding how you can prepare your child, see the following topics:
How will the EEG test feel?
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This test causes no discomfort. Although having electrodes pasted onto your skin may feel strange, they only record activity and do not produce any sensation. The electrode paste is removed once the study is complete. |
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