静的姿勢制御機能における加齢変化 - 鉛直・水平方向の足圧中心振動と年齢・体重・身長

Postural control in standing balance was analyzed in 80 volunteers, aged 31 to 92 years, who were free from equilibrium disease. Center of foot pressure (COP) was measured on a horizontal plane and in a vertical direction, during 20 sec with eyes open and 20 sec with eyes closed. COP-path length and COP-path area were obtained on the horizontal plane, and coefficient of correlation was tested for them with age, body weight and height. Integrated power between 0 and 10 Hz was tested for the horizontal medial-lateral oscillation, horizontal anterior-posterior oscillation, and vertical oscillation. Age was correlated with COP-path length and COP-path area, but body weight and height were not correlated with them. Age was correlated with the powers in the medial-lateral oscillation with eyes open and closed, and in the anterior-posterior oscillation with eyes closed. Body weight and height were correlated with the powers in the anterior-posterior oscillation with eyes closed and in the vertical oscillation with eyes open and closed. Conclusively, vision was important to the postural control for aged people, and the medial-lateral oscillation might increase with aging. Vertical oscillation correlated to body weight and height, which suggests important weight control for aged people.