Visualization of unconscious information in the brain by wearable EEG device

Abstract

We have been developing a wearable electroencephalograph (EEG) device. By using this device, EEG measurement outside hospitals and laboratories has become easier. Thus, the possibility of applications using EEG has been broadened. We are focusing on developing a system that can visualize a part of unconscious information in the brain. For example, neurofeedback training using a mismatch negative potential, which is an event-related potential (ERP) that responds to differences in sound, makes it possible that Japanese people can recognize the difference between "right" and "light" sounds. Moreover, it was clarified that we can estimate the English ability from an ERP equivalent to N400 extracted from EEG data during listening to English. Furthermore, it was suggested that the degree of immersion in the game can be estimated by error related potential, which was caused by an error recognition. These results suggested that the we can extract a part of information that is unconscious and difficult to verbalize from EEG data.