1) for the diagnosis of epilepsy, the EEG is one of the most important and most valuable and most convenient means in the diagnosis of epilepsy. In addition to the clinical manifestations, EEG can be found in the seizure and seizure. Now, with the advent of brain electrical monitor and dynamic EEG, 24 hours of recording and observation of EEG changes, and can accurately record the onset of the EEG during the attack, the diagnosis of epilepsy is more accurate and scientific. Especially for the clinical diagnosis of atypical epilepsy, rare type of epilepsy and hidden epilepsy, it is more necessary, or even play a decisive role.
(2) for the classification of epilepsy: all kinds of Epilepsy EEG have relative characteristics. Such as EEG showed that the height of the number of the children's spasm, display for the 3C/S spine - slow wave synthetic wave is more for the small attack, display for the intermittent period of the spike wave for the big attack and the spirit of the seizure. Focal epileptic wave 80% is a local or a mental exercise. Based on the clinical features of the patients with seizures and episodes of intermittent EEG, combined with the location of the lesion, the cause of disease and the age of onset of epilepsy, it is helpful to the clinical symptoms, especially for some clinical symptoms.
(3) for the identification of other diseases: some of the clinical characteristics of the disease is easy to be confused with epilepsy, EEG examination is one of the important means of identification. Such as syncope, it is a transient loss of consciousness caused by many reasons, such as a transient acute cerebral circulation disorder, which is not easy to distinguish between the clinical and the epileptic seizures and syncope. In patients with syncope, the EEG was normal, and the onset time was irregular. 2 ~ 3C/S slow wave. The induced test could not get the epileptic wave.