Abstract
Today, the half of disabled people have defect in the limb in Japan. In addition, in order to stabilize the standing or walking, they have to work their muscles well. There are many rehabilitation systems for them. However, it is too difficult for severe disabled people that cannot stand or walk using rehabilitation systems. On the basis of this current situation, rehabilitation systems that severe disabled people can use safely are necessary. We focus on reach movement with seating because this is one of the basic operation they desire reacquisition when suffer from disablement and the longer forward reach length makes people more stable. In this study, in order to understand the difference between extended posture and flexuous posture by healthy people people performing reach movement, we considered influence of posture on the muscle activity and floor reaction force. Then, in order to understand how differently healthy subjects and disabled subjects, we perform same experiment by disabled subjects. As a result, we understood flexuous posture by healthy subjects and severe disabled subjects apply a force to the buttocks than the foot. Also erector spinae muscle activity is extremely small in flexuous posture by healthy subjects and the peak of this muscle activity is seen at some point in time.
