Allard P, Thiry P S, Duhaime M, Geoffroy G
Can J Neurol Sci. 1982 May;9(2):119-25. doi: 10.1017/s0317167100043808.
Orthogonal stereoradiographs are frequently utilized in determining three-dimensional geometrical parameters of human body segments. They have been applied here in the estimation of the length and elongation of the ligaments of the normal foot. Three small spherical metallic markers were respectively encrusted into the tibia and fibula, the seven bones of the tarsus and into the five metatarsals of an amputated lower limb to identify uniquely their spatial location. The foot was then positioned on a rotating platform. Standardized antero-posterior and lateral radiographs were taken. Afterwards the foot was dissected and the proximal and distal insertions of most of its ligaments were located by means of spherical markers. A second series of orthogonal radiographs were taken of each of the fourteen bones. The radiographs were digitized. The length of each ligament and elongation for a simple and complex movements were calculated by means of a computer program. The results of a simple movement of rotation representing a normal 20 degree dorsiflexion at the talocrural joint and of complex movements of rotation stimulating an abnormal high arch such as encountered in Friedreich's ataxia are presented and discussed.
正交立体放射照片常用于确定人体节段的三维几何参数。本文将其应用于正常足部韧带长度和伸长率的估计。将三个小型球形金属标记分别嵌入截肢下肢的胫骨、腓骨、跗骨的七块骨头以及五块跖骨中，以唯一确定它们的空间位置。然后将足部放置在旋转平台上。拍摄标准化的前后位和侧位X线片。之后解剖足部，通过球形标记确定大部分韧带的近端和远端附着点。对十四块骨头中的每一块都拍摄了第二组正交X线片。将X线片数字化。通过计算机程序计算每个韧带的长度以及简单和复杂运动时的伸长率。展示并讨论了代表距小腿关节正常20度背屈的简单旋转运动以及模拟如弗里德赖希共济失调中出现的异常高弓的复杂旋转运动的结果。
