ABSTRACT
In parallel to rapid popularization of personal computers, EEG studies in psychiatric field have become one of important and indispensable methods particularly because of appearance of topographical imaging of scalp EEG b ased on quantitative techaics of convational qualitative ones. Pharmaco-EEG has been an example of quantitative EEG, which is quite useful in objectively predicting clinical efficacies of newly developed substance in healthy subject before giving it to patient with supposed targel from animal experiments. It is also usable in predicting clinical outcomes of psychotic disorder only single dose administration of the drug selected for the treatment. It may be quite evident that we have not necessarily to interpret EEG tracings by replacing them with EEG imagings, which are comparable to the other brain imagings such as CT, SPECT, PET and MRl. The author has proposed the creation of tele-EEG network systems through telephone line in near future.