Sharkey N A, Ferris L, Donahue S W
Center for Locomotion Studies, Pennsylvania State University, University Park 16902-5702, USA.
Foot Ankle Int. 1998 Dec;19(12):812-20. doi: 10.1177/107110079801901204.
To examine whether conformational changes induced by plantar fascial division may progress during gait, we loaded the feet of seven cadavers using an apparatus that simulates the actions of the extrinsic plantarflexors. We measured the effects of plantar fasciotomy at two instants in the terminal-stance phase of gait. Radiographic measurements of height of the arch, base length of the arch, and talo first-metatarsal angle were used to assess contributions to arch support made by the plantar fascia, tibialis posterior, peroneus longus and brevis, and digital flexor muscles. Complete fasciotomy caused significant collapse of the arch in the sagittal plane. Early in terminal stance, at the instant after heel-off, mean height of the arch decreased from 47 to 45 mm. Late in terminal stance, at the instant preceding contralateral heel strike, mean height of the arch decreased from 46 to 43. Effects of division of the central band, though significant, were mild. Medial base length of the arch increased from 163 to 167 mm in the absence of tibialis posterior contraction at late terminal stance. Arch-supporting abilities of the other extrinsic muscles were insignificant.
为了研究足底筋膜切断术所引发的形态变化在步态过程中是否会持续发展，我们使用一种模拟外在跖屈肌动作的装置对七具尸体的足部进行加载。我们在步态的终末支撑期的两个时刻测量了足底筋膜切开术的效果。通过对足弓高度、足弓基部长度以及距骨第一跖骨角的影像学测量，来评估足底筋膜、胫后肌、腓骨长肌和短肌以及趾屈肌对足弓支撑的作用。完全筋膜切断术导致足弓在矢状面显著塌陷。在终末支撑早期，足跟离地后的瞬间，足弓平均高度从47毫米降至45毫米。在终末支撑后期，对侧足跟撞击前的瞬间，足弓平均高度从46毫米降至43毫米。中央束切断的影响虽然显著，但较为轻微。在终末支撑后期，在没有胫后肌收缩的情况下，足弓内侧基部长度从163毫米增加到167毫米。其他外在肌肉的足弓支撑能力不显著。
