Paré E B, Stern J T, Schwartz J M
J Bone Joint Surg Am. 1981 Dec;63(9):1457-71.
Electromyograms recorded by three or four fine-wire bipolar electrodes inserted along a transverse line across the right tensor fasciae latae of ten normal adults (five men and five women, twenty to thirty-six years old) during a standardized series of exercises and locomotor activities demonstrated different functional roles for the anteromedial and posterolateral fibers of the muscle. Although anatomical dissections in six normal cadavera demonstrated that the force of contraction of the tensor fasciae latae could be transmitted to the knee by the iliotibial tract, the observed activity of this muscle can be explained completely in terms of its action at the hip. The anteromedial fibers have a greater mechanical advantage for hip flexion than do the posterolateral fibers, whereas the posterolateral fibers possess a better mechanical advantage for hip abduction and internal rotation. During walking the anteromedial fibers were electromyographically silent, whereas the posterolateral fibers were active near heel-strike. For all subjects, increased locomotor velocity (during jogging, running, and sprinting) was associated both with increased activity of the anteromedial fibers near toe-off apparently to assist deceleration of extension and acceleration of flexion of the thigh, and with increased activity of the posterolateral fibers at heel-strike.
在一系列标准化的运动和日常活动中，沿着横穿十名正常成年人（五男五女，年龄在20至36岁之间）右侧阔筋膜张肌的横向线插入三到四根细线状双极电极记录的肌电图，显示了该肌肉前内侧和后外侧纤维的不同功能作用。尽管对六具正常尸体的解剖表明，阔筋膜张肌的收缩力可通过髂胫束传递至膝关节，但观察到的该肌肉活动完全可以用其在髋关节处的作用来解释。前内侧纤维在髋关节屈曲方面比后外侧纤维具有更大的机械优势，而后外侧纤维在髋关节外展和内旋方面具有更好的机械优势。在行走过程中，前内侧纤维的肌电图显示无活动，而后外侧纤维在足跟触地时活跃。对于所有受试者，运动速度增加（在慢跑、跑步和冲刺过程中）与前内侧纤维在足趾离地附近的活动增加相关，这显然有助于大腿伸展的减速和屈曲的加速，同时也与后外侧纤维在足跟触地时的活动增加相关。
