Brain-machine interfaces (BMIs), which connect brain tissue to machines, have been investigated extensively in recent years. The main purpose of a BMI is to assist paralyzed patients by enabling them to operate machines based on their own brain activity. In this paper, we measure brain activation using near-infrared spectroscopy (NIRS) so as to clarify the relationship between the consciousness and unconsciousness in the motion. It is hope that the results obtained in this study can be applied

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... o machine operation using a BMI. Bio-locomotion is divided into voluntary movements, which are made voluntarily and consciously, and passive movement, which are made passively and unconsciously. Accordingly, we investigate the brain activation associated with these two types of movement. The subjects successively move their lower legs through knee bends using a vibratory device which we made to conduct experiments. The result showed that the concentration of oxygenated hemoglobin (oxy-Hb) levels change in the primary NIRS を用いた随意運動および他動運動の脳賦活分析 *