The bioelectricity current effected by brain wave---electroencephalograph which has regularity contains mass information of brain activity. The method using EEG to describe, record and measure the brain function has been used for nearly eighty years and has been proved to be scientific and practical.
It also has been used widely for scientific research of advanced brain activity and neurology diagnosis to brain disease such as epilepsy, encephaloma encephalitis, cerebral injury and cerebrovascular disease.
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