25/10/2021
Some education…worth reading!
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EEG (Electroencephalogram)
What is an EEG?
An electroencephalogram (EEG) is a test used to evaluate the electrical activity in the brain. Brain cells communicate with each other through electrical impulses. An EEG can be used to help detect potential problems associated with this activity.
An EEG tracks and records brain wave patterns. Small flat metal discs called electrodes are attached to the scalp with wires. The electrodes analyze the electrical impulses in the brain and send signals to a computer that records the results.
The electrical impulses in an EEG recording look like wavy lines with peaks and valleys. These lines allow doctors to quickly assess whether there are abnormal patterns. Any irregularities may be a sign of seizures or other brain disorders.
Why is an EEG performed?
An EEG is used to detect problems in the electrical activity of the brain that may be associated with certain brain disorders. The measurements given by an EEG are used to confirm or rule out various conditions, including:
seizure disorders (such as epilepsy)
head injury
encephalitis (inflammation of the brain)
brain tumor
encephalopathy (disease that causes brain dysfunction)
memory problems
sleep disorders
stroke
dementia
When someone is in a coma, an EEG may be performed to determine the level of brain activity. The test can also be used to monitor activity during brain surgery.
Are there risks associated with an EEG?
There are no risks associated with an EEG. The test is painless and safe.
Some EEGs do not include lights or other stimuli. If an EEG does not produce any abnormalities, stimuli such as strobe lights, or rapid breathing may be added to help induce any abnormalities.
When someone has epilepsy or another seizure disorder, the stimuli presented during the test (such as a flashing light) may cause a seizure. The technician performing the EEG is trained to safely manage any situation that might occur.
How do I prepare for an EEG?
Before the test, you should take the following steps:
Wash your hair the night before the EEG, and don’t put any products (like sprays or gels) in your hair on the day of the test.
Ask your doctor if you should stop taking any medications before the test. You should also make a list of your medications and give it to the technician performing the EEG.
Avoid eating or drinking anything containing caffeine for at least eight hours before the test.
Your doctor may ask you to sleep as little as possible the night before the test if you have to sleep during the EEG. You may also be given a sedative to help you relax and sleep before the test begins.
After the EEG is over, you can continue with your regular routine. However, if you were given a sedative, the medication will remain in your system for a little while. This means that you’ll have to bring someone with you so they can take you home after the test. You’ll need to rest and avoid driving until the medication wears off
