This paper considered a rehabilitation device for leg paralyzed patients and developed a foot pedaled exercise device. This device has foot pedal driven by motor and crank mechanism, and forcibly moves legs fixed on pedals. To confirm performance of this device as a part of brain- machine interface (BMI) lower limb rehabilitation system, we investigated user's brain activity during his foot pedal exercise by electroencephalography (EEG) and near-infrared spectroscopy (NIRS). As a result, we confirmed that the brain activity characteristics measured at using our developed device is almost the same as the characteristics measured at using bicycle ergometer. This indicates that our developed device is possible to use a lower limb rehabilitation device.
