Effect of ankle-foot orthosis on roll-over shape in adults with hemiplegia
Effect of ankle-foot orthosis on roll-over shape in adults with hemiplegia
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DOI：
10.1682/jrrd.2006.08.0090
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发表时间：
2007-01-01
影响因子：
--
通讯作者：
Hansen, Andrew H.
中科院分区：
文献类型：
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作者：
Fatone, Stefania;Hansen, Andrew H.
踝足矫形器 (AFO) 旨在改善摆动过程中的脚趾间隙以及初始接触 (IC) 和中间站立时的踝关节位置。改善踝足运动学的变化可能会导致更加仿生的翻转形状（ROS）。 ROS 是 IC 和对侧 IC 之间踝足复合体所遵循的有效几何形状。步态期间有效的 ROS 可能有助于向前进展。本研究调查了 AFO 对中风后偏瘫成人患者 ROS 的影响。记录了 13 名偏瘫患者和 12 名对照者的运动和力数据。偏瘫受试者以自行选择的速度行走，有或没有带有跖屈止动装置的铰接式 AFO。对于受影响的肢体，AFO 显着增加了 ROS 弧长（从足长 [FL] 的 32.6% 增加到 55.7%）和弧半径（FL 的 67.4% 增加到 139.3%），并显着改变了第一压力中心 (COP) 点的矢状平面位置，将其移至踝中心后方（FL 的 -1.2% 到 -20%）（所有比较 p < 0.002）。然而，当偏瘫患者佩戴 AFO 行走时，其平均弧半径更大，平均弧长更短，并且第一个 COP 点比对照受试者更靠后。
Ankle-foot orthoses (AFOs) are intended to improve toe clearance during swing and ankle position at initial contact (IC) and midstance. Changes that lead to improved ankle-foot kinematics may result in a more biomimetic rollover shape (ROS). ROS is the effective geometry to which the ankle-foot complex conforms between IC and contralateral IC. An effective ROS during gait may facilitate forward progression. This study investigated the effect of an AFO on ROS in adults with hemiplegia following stroke. Kinematic and force data were recorded from 13 people with hemiplegia and 12 controls. Hemiplegic subjects walked at a self-selected speed with and without an articulated AFO with plantar flexion stop. For the involved limb, the AFO significantly increased the ROS arc length (from 32.6% to 55.7% of foot length [FL]) and arc radius (67.4% to 139.3% of FL) and significantly altered the sagittal plane location of the first center of pressure (COP) point, moving it posterior to the ankle center (-1.2% to -20% of FL) (p < 0.002 for all comparisons). However, when hemiplegic patients walked with an AFO, their mean arc radius was greater, mean arc length less, and the first COP point further posterior than those of control subjects.