How the procedure is done?

The brain consists of a huge number of neurons, each of which generates its own electrical impulse. All signals must be consistent within small areas of the brain. The strength and amplitude of these microcurrents are not stable and must change.

This bioelectric activity of the brain can be registered using special metal electrodes placed on the intact scalp. They pick up the vibrations of the brain, amplify them and record them on paper or display them on a monitor in the form of waves. The resulting image is a graphical representation of how the brain works in real time.

Patient goes into a special room, isolated from light and sound, a special cap with electrodes is put on his head, he sits in a comfortable chair or lies on a couch. Various tests are usually used for diagnosis:

With a flash of bright light (photostimulation);
With monotonous on / off light;
With hyperventilation (deep breathing);
With loud sound (audio stimulation);
Falling asleep - on its own or with the help of sedative.

The procedure lasts from 30 minutes to 2 hours in the daytime. After graduation, patients can return to their usual activities.

Types of EEG 

Sleep-deprived EEG. It is carried out after short-term sleep deprivation (up to 24 hours) for more accurate detection of pathological changes. During the recording, provocative loads are applied: photo and phonostimulation, hyperventilation; deprivation of sleep, sleep (physiological).

EEG video monitoring is a study during which a long-term synchronous recording of electroencephalogram and video data patient's motor and behavioral activity is carried out. This study is of great importance for the diagnosis of various paroxysmal conditions and disorders in neurology, primarily in the diagnosis and differential diagnosis of epilepsy, non-epileptic paroxysms (panic attacks, visual, auditory hallucinations, hyperkinesis, etc.); conditions arising in sleep (sleepwalking, dreaming, etc.)