Ishizawa Masanori, Yamamoto Shin-Ichiroh
Shibaura Institute of Technology, Japan.
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:4772-5. doi: 10.1109/EMBC.2012.6347034.
Previous studies have reported that postural coordination patterns change as a function of translation frequency. However, the effect of inclined support surface on postural strategy was not clear. Therefore, the purpose of this study is to investigate the influence of inclined support surface on postural strategy during platform translations. Eight healthy adults maintained their balance in stance during support surface translations in the anterior-posterior direction at two different frequencies (0.2 and 0.8[Hz]) and at three different base of support condition (LV: Level, TD: Toe Down, TU: Toe Up). For the kinematic data at slow frequency, subjects rode the platform depending on the movement of platform itself, while at fast frequency subjects fixed their head and center of mass (COM) in space. For the kinetic data at slow frequency, the ankle moment amplitude is similar among all support surface conditions, while at fast frequency the ankle moment amplitude for TU is significantly larger than LV. Result shown that the effect of inclined surface on postural strategy changed according to frequency of support surface translations.
先前的研究报告称，姿势协调模式会随着平移频率的变化而改变。然而，倾斜支撑面对姿势策略的影响尚不清楚。因此，本研究的目的是探讨倾斜支撑面在平台平移过程中对姿势策略的影响。八名健康成年人在支撑面以两种不同频率（0.2和0.8[赫兹]）在前后方向上平移以及三种不同支撑条件（LV：水平，TD：脚尖向下，TU：脚尖向上）下保持站立姿势的平衡。对于低频运动学数据，受试者根据平台自身的运动乘坐平台，而在高频时，受试者将头部和质心（COM）固定在空间中。对于低频动力学数据，在所有支撑面条件下，踝关节力矩幅度相似，而在高频时，TU的踝关节力矩幅度明显大于LV。结果表明，倾斜表面对姿势策略的影响会根据支撑面平移的频率而变化。
