Electroencephalography (EEG) is a procedure that uses electrodes placed on the scalp to register action currents (or brain waves) in the human brain. This procedure makes it possible to differentiate functional diseases of the brain from organic ones. In the case of many brain diseases, EEG allows for precise identification of the affected brain area. This examination is particularly important in patients with epileptic seizures, in the course of encephalitis and after cranial traumas, as well as for the diversification of comas. EEG performs an auxiliary role in the assessment of patients with brain tumours and angiogenic brain damage (after brain strokes). In some cases, this examination method serves to monitor brain function, e.g. in patients with numerous epileptic seizures, during surgeries on the carotid artery or the heart, as well as to assess sleep disorders. EEG can only be performed upon medical referral.
How to prepare for the examination:
It is not strictly necessary to perform other examinations or tests beforehand. Drugs that stimulate or inhibit the central nervous system should not be taken within a 24-hour period before the examination. Before the examination, it is necessary to avoid beverages with alcohol or caffeine content (strong tea or coffee, Coca-Cola, etc.). You should come for the examination after eating a light meal, to avoid any decreases in the blood sugar level. It is necessary to wash your hair before the examination. It is forbidden to use any hair lotions, gels or creams for hair modelling. The examination should be taken when you are relaxed and well-rested.
Inform the person performing the test about the following:
before the test:
- current medications;
during the test:
- any sudden feelings of discomfort (e.g. headaches, dizziness, drowsiness).