What is electroencephalography?

Electroencephalography is the generation of a tracing or graph of brain waves, which represent the electrical activity of the brain.

What is an electroencephalogram or electroencephalograph (EEG)?

An electroencephalogram or electroencephalograph (EEG) is a graphic record of the electrical activity of the brain.

What is an electroencephalograph machine?

An electrocardiograph machine is a device that measures and records electrical activity in the heart by the use of ECG pads placed on the chest and connected to wires, call leads. The leads are connected to a bedside monitor where the information is displayed. ECGs are usually measured in at least one view (i.e., one line on the monitor). Many doctors and nurese want more than one view, often as many as twelve views, also called leads. To measure these different views, ECG pads are placed on several parts of the body. The nurse determines where to place these pads based on the view of the heart that is desired.

What information does the EEG provide?

The EEG provides information about the electrical activity of the brain. From this information the doctors can tell if a patient is having seizures (convulsions), decreased brain function, or normal brain function. It is a helpful tool to pinpoint brain function problems.

How long is an EEG used?

Depending on the circumstances, only a single recording may be made or the device may be used continuously for several days.

Does having an EEG hurt?


Are there any potential complications associated with having an EEG?

There are no significant complications associated with having an EEG.

An electroencephalograph machine making an electroencephalogram (EEG)

Patient with EEG pads and leads in place