Carmines D V, Nunley J A, McElhaney J H
Department of Biomedical Engineering, Duke University Medical Center, Durham, North Carolina.
J Orthop Res. 1988;6(2):223-9. doi: 10.1002/jor.1100060209.
Gait analysis was used to compare the ground reaction forces, ankle and foot rotations in the sagittal plane, and the center of pressure pattern beneath the right feet of seven normal subjects walking barefoot, with and without their right ankles taped in the neutral position. Instrumentation included a force plate, ankle goniometer, and two accelerometers mounted on top of the foot. The ground reaction forces showed no changes between the same ankle, taped and untaped. Taping served to reduce the range of ankle rotations in the sagittal plane by approximately 20%, with a subsequent increase in the rotation about the metatarsal heads during heel-up. Heel-up occurred earlier in stance when the ankle was taped than with no taping. The vertical force graph was integrated over time when the center of pressure was located beneath the heel and the ball, resulting in two impulse measurements. The heel impulse decreased for each of the 7 subjects and 6 of the 7 subjects displayed an increase in the ball impulse due to taping, indicating that taping served to shift the load-time history away from the heel and toward the ball. The results of this study may apply to fused ankle patients, who may suffer forefoot abnormalities subsequent to ankle fusion surgery.
步态分析用于比较7名正常受试者在赤足行走时，右脚在有无将右踝关节固定于中立位的情况下，其地面反作用力、矢状面内的踝关节和足部旋转以及足底压力模式。检测设备包括一个测力台、一个踝关节角度计以及两个安装在足部上方的加速度计。同一踝关节在固定和未固定时，地面反作用力未显示出变化。固定踝关节可使矢状面内的踝关节旋转范围减少约20%，随后在足跟抬起时，跖骨头周围的旋转增加。当踝关节固定时，足跟抬起在站立期比未固定时更早发生。当压力中心位于足跟和跖球下方时，垂直力曲线随时间进行积分，得出两个冲量测量值。7名受试者的足跟冲量均降低，7名受试者中有6名由于固定而使跖球冲量增加，这表明固定有助于将负荷-时间历程从足跟转移至跖球。本研究结果可能适用于踝关节融合患者，他们在踝关节融合手术后可能会出现前足异常。
