Electroencephalography (EEG)

A completely painless and safe diagnostic method that uses scalp electrodes to measure the electrical activity of the cerebral cortex.

Why is EEG performed?

Electroencephalography is most commonly used to diagnose epilepsy and sleep disorders; however, some changes may indicate structural changes in the brain, such as encephalopathy, tumor, stroke, or other focal changes. Electroencephalography also reveals physiological aspects of brain function.

Indications for EEG tests:

  • Epilepsy and convulsive syndromes of any kind
  • Syncopal state (fainting)
  • Internal bleeding and brain tumors
  • Traumatic brain injuries cause damage
  • Alzheimer's disorder and dementia
  • Infections like encephalitis, etc.
  • Sleeping disorders
  • Stroke
  • Metabolic and hormonal conditions that affect brain tissue
Electroencephalography as a diagnostic method is popular because it has several significant advantages:
- it is safe and painless;
- no contraindications;
- no side effects;
- no age restrictions;
- takes less than 30 minutes;
- high test accuracy;
- not an expensive procedure.

How is EEG performed?

There are several methods for performing the EEG procedure. In general, it is a painless test in which small electrodes (the number of electrodes varies depending on the disease being studied) are applied to the patient's scalp with a washable adhesive or a cap with built-in electrodes to collect electrical signals generated by the brain.

The client is instructed to lie down on a bed or in a recliner chair. After cleaning the patient's scalp, the specialist glues or applies conductive paste to the electrodes.

After the procedure begins, the electrodes on the patient's scalp detect electrical impulses that travel between brain cells. The electrodes are connected to wires that send information about the patient's electrical impulses to the EEG equipment. The equipment records information in the form of lines (waves) representing the patient's brain's electrical patterns.

Following the EEG procedure, the doctor examines the recorded brain activity to look for any abnormal patterns or changes. An EEG can help rule out or confirm the presence of specific neurological disorders, such as traumatic brain injuries, sleep disorders, and so on. It also helps the doctor make an appropriate treatment decision.

FAQs about EEG
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