Cornwall M W, McPoil T G
Department of Physical Therapy, Northern Arizona University, Flagstaff 86011.
Foot Ankle Int. 1994 Feb;15(2):75-9. doi: 10.1177/107110079401500205.
The purpose of this study was to determine whether tibialis anterior muscle activity influences the rate of rearfoot motion during walking. Two-dimensional rearfoot motion was recorded from 23 feet. The feet were assigned to one of two experimental groups. Muscle activity was recorded from the tibialis anterior muscle using surface electrodes. The early pronators (N = 12) reached maximal pronation within the first 20% of the stance phase. The late pronators (N = 11) reached maximal pronation only after 40% of the stance phase. The results of a t-test showed that there was a significant difference (P < .05) in the time to minimal tibialis anterior muscle activity between the two groups. These results indicate that tibialis anterior muscle activity can influence rearfoot motion during the stance phase of walking. A clinician should consider the muscular system when evaluating and designing a treatment program for patients with foot-related problems. The results of this study also indicate that static nonweightbearing evaluations alone may not provide an accurate picture of the foot during walking.
本研究的目的是确定胫骨前肌活动是否会影响步行过程中后足的运动速率。记录了23只脚的二维后足运动情况。这些脚被分配到两个实验组之一。使用表面电极记录胫骨前肌的肌肉活动。早期旋前者（n = 12）在站立期的前20%内达到最大旋前。晚期旋前者（n = 11）仅在站立期的40%之后才达到最大旋前。t检验结果显示，两组之间胫骨前肌活动降至最低的时间存在显著差异（P < 0.05）。这些结果表明，胫骨前肌活动可在步行站立期影响后足运动。临床医生在评估和为足部相关问题患者设计治疗方案时应考虑肌肉系统。本研究结果还表明，仅进行静态非负重评估可能无法准确反映步行时的足部情况。
