Evaluation of Dynamic Sitting Balance in Elderly People(Mechanical Systems)

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  • 高齢者における動的座位バランスの評価(機械力学,計測,自動制御)
  • 高齢者における動的座位バランスの評価
  • コウレイシャ ニ オケル ドウテキザイ バランス ノ ヒョウカ

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This paper presents a system for evaluating dynamic sitting balance in elderly people to prevent their falls and hip fractures. The proposed system comprises a three-dimensional position and orientation sensor for measuring the upper body joint angle, a stabilometer for measuring the center of pressure (COP) trajectory and the seat reaction force, and a six-degree-of-freedom platform for producing seat perturbation. The seat reaction force and joint angle of the upper body were used to calculate the joint torque of lumbar and thoracic vertebra. In the experiments, 11 young and 14 older healthy adults tried to maintain a sitting posture relative to the seat perturbation (0.25 and 0.5Hz, 5deg amplitude). Results of experiments show that the COP trajectory and the joint torque were significantly higher in elderly subjects.

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