A Study on the Progress of Performance Through Forehead EEG Biofeedback Training

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EEG amplifiers (FM515s, ss) picked up the EEG at Fp_2 position, and divided it into six bandpass waves (the θ_2, α_1, α_2, α_3, β_2 waves and the artifact). It distinguished one dominant wave in the EEG in each 2 second interval. The speed of A/D conversion is 20ms. The amplitude of these six bandpass waves is an out put with a 1/256 resolution of the full scale every 2 seconds. Signal sounds at the BFT by means of the image based on autogenic training, color, scene and sound were sent from FM515S when the Fp_2 α_2 wave appeared predominantly. Performance was measured by means of concentration level meter and others.The following several researches were performed in series :1 Examination of the increasing concentration by the EEG α_2 wave biofeedback training using the autogenic training method.2 Relationship between the improvement of performance and prevalent Fp_2 α_2 wave by EEG biofeedback training using the imagination.3 Relationship between a person's comfortable feelings caused by sound and the prevalent EEG.4 Relationship between the performance of hitting the mark in kyudo and the control of heart rate by biofeedback training using autogenic training with Kyudo athletes and others.As a result, the following conclusions were obtained :1. A high level of concentration to one point is accompanied by a large time fraction of the Fp_2α_2 wave.2. Intensification of the Fp_2α_2 wave can be accomplished by BFT of the prevalent EEG α_2 wave using the autogenetic training method.3. The concentration level to one point can be increased by the intensification of the Fp_2 α_2 wave accomplished through BFT using the autogenetic training method.4. The time fraction of each wave prevalent in EEG is a reasonable measure of psychological response more than the time average of EEG amplitude.5. The concentration level to one point can be increased by the intensification of the Fp_2 α_2 wave accomplished through BFT using the imagination.And others.