Electroencephalography EEG is a method of recording the functional currents produced in the brain. The EEG apparatus is equipped with special electrodes, which are placed on the head. These electrodes record changes in the potential of bioelectrical currents in the brain.
The EEG enables to differentiate between organic and functional brain diseases. It allows to localize the disease process in a specific area (e.g. frontal lobe). It is particularly useful in epileptic states, the course of brain trauma, and also in differentiating comas.
Preparation for the examination – electroencephalography
- A light meal should be consumed before the examination.
- Hair should be washed and hair spray, gels, etc. should not be used.
- The patient should be rested and sleepy.
- No drugs or medicines that stimulate or inhibit the nervous system, e.g. cola, strong tea, alcohol, coffee, should be consumed before the examination.
- you must tell the doctor you are taking medication before the test.
Procedure of the EEG examination
The test is performed sitting or lying down. The scalp is rubbed with alcohol or ether at the electrode site. Gel-coated electrodes are placed on the head. The patient should be relaxed and should not make any movements. During the test, the doctor may ask you to open and close your eyes or to breathe faster. Sometimes the examination is performed while you sleep. The test takes several tens of minutes.
Indications for an EEG examination
- epileptic seizures
- head injuries
- sleep disorders
- diagnosis of chronic headaches.
This examination is painless and can be performed in children and adults.