Tardieu G, Lespargot A, Tardieu C
Eur J Appl Physiol Occup Physiol. 1977 Sep 16;37(2):163-71. doi: 10.1007/BF00421702.
Previous papers gave some methods for the reliable measurement of the tibia-calcaneum angle. It is of common use to evaluate the physical properties of triceps surae on the basis of torque-angle curves. However this method is reliable only if each tibia-calcaneum angle corresponds to a defined distance between the insertions of the muscle in subjects of the same height. Evidence is given by radiological measurements that this correspondance is correct in normal children. However, this is no longer true in certain cerebral palsied children because of abnormal translation of the calcaneum and/or abnormal ratio of bone sizes. In this case the torque-angle curves do not define properly the torque-length curves. A method of correction is given. This correction may be as high as 15 degrees.
以往的论文给出了一些可靠测量胫跟角的方法。基于扭矩-角度曲线来评估小腿三头肌的物理特性是常用的方法。然而，只有当每个胫跟角对应于相同身高受试者肌肉附着点之间的特定距离时，这种方法才是可靠的。放射学测量表明，在正常儿童中这种对应关系是正确的。然而，在某些脑瘫儿童中，由于跟骨的异常移位和/或骨尺寸比例异常，情况就不再如此了。在这种情况下，扭矩-角度曲线不能正确地定义扭矩-长度曲线。本文给出了一种校正方法。这种校正可能高达15度。
