The relationship between ankle, hindfoot, and forefoot position and posterior tibial muscle excursion
The relationship between ankle, hindfoot, and forefoot position and posterior tibial muscle excursion
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DOI：
10.3113/fai.2007.0448
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发表时间：
2007-04-01
影响因子：
2.7
通讯作者：
Houck, Jeff
中科院分区：
文献类型：
--
作者：
Flemister, Adolph S.;Neville, Christopher G.;Houck, Jeff
背景：本研究的目的是使用体外尸体模型检查横向平面中的前足位置（外展/内收）、额平面中的后足位置（外翻/内翻）和矢状平面中的踝关节位置（跖屈/背屈）与胫骨后肌（PT）肌肉偏移的关系。方法：将七个新鲜冷冻尸体标本盆栽并安装在框架上。在内踝近端 15 cm 处解剖 PT 肌腱，并将 5 kg 重物缝合到肌腱上。六摄像头运动分析系统（Optotrak，Northern Digital，Inc.）用于使用骨针跟踪胫骨、跟骨（后足）和第一跖骨（前足）的三维（3D）运动。脚踝、后脚和前脚被手动放置在 24 个不同的脚踝和脚位置。使用逐步回归分析来检查踝关节、后足和前足运动学与 PT 肌肉偏移之间的关系。结果：后足外翻/内翻和前足外展/内收占 PT 肌肉偏移方差的 77%，踝关节跖屈/背屈 (5.7%) 和前足跖屈/背屈 (1.9%) 的贡献较小。应用于单个样本的组合回归方程导致平均误差小于 2.5 毫米。结论：本研究支持以下假设：可以使用特定的足部和踝关节运动学变量来估计 PT 肌肉偏移。此外，这些数据表明，后足外翻和前足外展是 PT 肌肉偏移的大部分差异的原因，并且理论上对于控制临床上改变胫骨后肌的长度很重要。
Background: The purpose of this study was to examine the relationship of forefoot position in the transverse plane (abduction/adduction), hindfoot position in the frontal plane (eversion/inversion), and ankle position in the sagittal plane (plantarflexion/dorsiflexion) with posterior tibialis (PT) muscle excursion using an in vitro cadaver model. Methods: Seven fresh-frozen cadaver specimens were potted and mounted on a frame. The PT tendon was dissected 15 cm proximal to the medial malleolus, and a 5-kg weight was sutured to the tendon. A six-camera motion analysis system (Optotrak, Northern Digital, Inc.) was used to track three-dimensional (3D) motion of the tibia, calcaneus (hindfoot) and first metatarsal (forefoot) using bone pins. The ankle, hindfoot, and forefoot were manually placed in 24 different ankle and foot positions. A stepwise regression analysis was used to examine the relationship among ankle, hindfoot, and forefoot kinematics and PT muscle excursion. Results: Hindfoot eversion/inversion and forefoot abduction/adduction accounted for 77% of the variance in PT muscle excursion, with small contributions from ankle plantarflexion/dorsiflexion (5.7%) and forefoot plantarflexion/dorsiflexion (1.9%). A combined regression equation applied to individual specimens resulted in average errors of less than 2.5 mm. Conclusions: This study supports the hypothesis that PT muscle excursion can be estimated using specific foot and ankle kinematic variables. Further, these data suggest that hindfoot eversion and forefoot abduction account for most of the variance in PT muscle excursion and are theorized to be important to control clinically altering the length of the posterior tibial muscle.