With the continuous development of electronic technology, such as electronic computer and amplifier, the modern EEG machine is basically a digital EEG machine, mechanical old EEG machine is gradually eliminated. And the digital EEG machine is constantly updated. Lead number from the initial 8 lead EEG, gradually upgraded to 16, 32, 40, 64,, 128, 196, and so on, and even has been the emergence of 256 eeg.

At the same time, the electroencephalogram (EEG) and video camera system have been combined, and the digital video electroencephalogram (VEEG) has been emerged. That electroencephalogram (EEG) at the same time, video, and through the software to every moment of electroencephalogram (EEG) and video image corresponding to stand up, can electroencephalogram (EEG) at the same time, watch patients at the onset of the synchronized video and greatly improve the understanding of seizure events can be easier to shave artifact interference than.

Video EEG as the name suggests, is the combination of EEG and video. According to the number of EEG channels can also be divided into 32 channel video EEG, 64 channel video EEG and 128 channel video EEG etc., according to the need, also can easily produce more video EEG; according to the number of cameras can also be divided into single camera visual frequency electroencephalogram (EEG) and dual camera video EEG. The current trend is a dual camera video EEG, a shooting in patients with systemic observed overall episodes, another shooting local can be better observed seizures when face and eye subtle movements, such as lip smacking, blink of an eye. Single camera video EEG disadvantage is either only to see the general attack, or just look at the local attack, can not take into account.

Video EEG machine quality is mainly depends on three factors: amplifier, camera system and computer system. Because of the rapid development of computer and video camera, computer and camera are not the key factors of video EEG. The important factor to decide the video EEG is the anti-interference ability of the amplifier and the software system of the computer.

The number of lead is not the factor that determines the quality of video EEG. According to the clinical needs, the scalp EEG in the outpatient clinic, 32 digital video EEG is enough. In epilepsy surgery for invasive electroencephalogram (EEG) is much to lead multiple EEG, usually cases, 128 channel EEG can meet the needs of the general labor.