Attempts to Quantitative Analyze for the Change of Human Brain Activity with Physical and Psychological Load

Recently, Japan (also world-wide countries) has become aged society, and a wide variety welfare device and system have been developed. Various companies are trying to enter the welfare device and system. Successful cases of the attempt are rare. There are several problems. For example, it is difficult to sell to the user because it does not known the effect. Thus, the direction of development is hard to determined. Because there is no evaluation method is the main cause of those. Evaluation of welfare system and device are limited only stability, intensity and partial operability. So, evaluation of usefulness is insufficient. Therefore, we will attempt to establish the standard to evaluate usefulness for objectively and quantitatively on the basis of including non-verbal cognition. In this paper, we measure load of sitting and standing movement to use Electoromyogram (EMG) and 3D Motion Capture and set a goal to establish objective evaluation method. We think that establishing objective evaluation method is necessity to develop useful welfare device. We examined possibility of assessing load and fatigue from measuring brain activity to use Near Infra-Red Spectroscopy (NIRS). The idea of universal design is widespread in welfare device and system. Measuring requires verification of all generations. But, we performed to measure younger subjects as a first step. We think that younger subjects were observed the significant difference, because they had enough physical function. Considering younger subjects as a benchmark is appropriate for creating evaluation method.