A brain wave test, otherwise known as an electroencephalogram (EEG), is a process that allows tiny metal discs (electrodes) placed on your scalp to detect electromagnetic activity in your brain. Even while you’re sleeping, your brain cells interact with each other through electrical impulses. Wavy lines may be seen on an EEG recording when this activity is present.
Why Is This Done?
A brain wave test may detect variations in brain function that can aid in the diagnosis of many brain diseases, including epilepsy as well as other neurological disorders. The following disorders may be diagnosed and treated with an EEG:
- Stroke
- Tumor in the brain
- Sleep disturbances
- Head injuries
- Brain irritation
- Brain damage
A brain wave test could also be applied to verify cell death in people who have been in a coma for a long time. In a comatose state, a continual EEG is utilized to determine the appropriate degree of anesthetic.
Danger
EEGs are comfortable and secure. During the exam, seizures in individuals with epilepsy are sometimes deliberately provoked, although if this happens, proper medical treatment is given.
How do you get ready?
Medications and food
- Caffeine-containing beverages should be avoided on the day before the test since it may influence the findings.
- Unless otherwise directed, continue taking your regular medicines.
What you may anticipate
During the test
During brain wave tests it should produce little or no pain. There are no feelings sent by the electrodes. Instead, they just take notes on your electrical impulses.
While in an EEG, you may anticipate the following to occur:
- A technician will take your head measurement and mark your head with a specialized pencil to designate where the electrodes should be attached. To raise the effectiveness of the recording, scrape such areas on your scalp with a grainy cream.
- A specialist contains a unique glue to adhere plates (electrodes) to your scalp. A flexible hat with electrodes is sometimes used instead. Wires link the electrodes to a device that enhances the brainwave activity and saves them on electronic equipment.
- You sit comfortably and your eyes closed throughout the test. The technician may request you to perform some basic arithmetic, read a text, snap a picture, take a few slow breaths, or look at a flashing dispersed light.
