What is brain electroencephalography ?


1. When appointed?

2. Contraindications

3. How to prepare?

Electroencephalography (EEG) - a non-invasive method for the diagnosis of the brain based on the registration of electrical impulses that originate from its individual regions and zones.Registration is carried out by a special device - an electroencephalograph in sound and svetoizolirovannom room.

patient during diagnosis usually lies on a bed or sitting in a chair.Its head mounted electrodes (the most common chashechkovye, bridging and needle) with special caps.If necessary, long-term recording can capture their special glue (collodion) or a special paste.Each electrode is connected to the device.During the recording of brain biocurrents patient is recommended not to move, as this will cause interference in the EEG, complicating the decoding of the results.Also, the patient can not be in a state of hypoglycemia (hunger), psycho emotional excitation, and under the influence of sedatives (sedative) funds.

signals coming from the cerebral cortex, comes to an electroencephalograph, which immediately converts them into a graphic image in the form of waves.This image reminds heartbeat on an electrocardiogram (ECG).Brain EEG expectancy in different laboratories can vary and depend on the condition of the patient, his diagnosis, the presence of diagnostics during seizures, etc.Often the necessary information can be obtained about half an hour, but the technician or physician can reduce or increase the EEG recording, if necessary.

When he appointed?

brain Electroencephalography is indicated for any speech, mental and neurological disorders.Also, the EEG data are of great importance in the study of patients with epilepsy, because it only shows the electroencephalogram epileptic brain activity.In addition, this diagnosis makes it possible to identify the causes of crises, endocrine diseases, frequent headaches, autism, degenerative, inflammatory and vascular cerebral pathologies, fainting, coma, and panic attacks.

EEG results can be studied:

  • location of the pathological focus;
  • cycle "sleep and wakefulness";
  • dynamics of the rehabilitation process.

Among other things, you can:

  • evaluate the effectiveness of treatment of different drugs affect the central nervous system;
  • determine the direction of the lesion.

Contraindications Absolute contraindications for brain electroencephalography not.If the patient has seizures, hypertension, coronary heart disease, or he suffers from mental illness at the time of the study there anesthetist (especially if there is a need for functional tests).

How to prepare?

eve of study is recommended to wash the head, remove the pins and ornaments, untwist braids.Styling hair is better not to use.In some cases, the doctor may ask to limit sleep before diagnosis, the patient was able to sleep during the execution of electroencephalography (EEG), which will increase its informative value.Under sleep restriction meant reducing its duration for several hours (at least 3-4 hours).

necessary to bring a towel, because after the study will have to clear your head from the electrode gel or paste.Young children in feeding may be required when recording.

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