Németh G, Ohlsén H
Spine (Phila Pa 1976). 1986 Mar;11(2):158-60. doi: 10.1097/00007632-198603000-00011.
Computed tomography is valuable in obtaining in vivo length of muscular moment arms, which can be used in biomechanical models. Using computed tomography, the authors measured lengths of the muscular moment arms of the erector spinae, psoas, oblique abdominal, and rectus abdominis muscles to the bilateral motion axis (about which flexion/extension movements occur) and to the anteroposterior motion axis (about which lateral bending occurs), both axes running through the lumbosacral joint. The subjects were 21 patients. Examinations were performed on a General Electric CT/T 7800 scanner. The average erector spinae moment arm to the bilateral motion axis was 68 mm, which is greater than the moment arm used earlier. The results also revealed significant differences in moment arm length between men and women for several muscles. The authors conclude that for some muscles different moment arm lengths should be used for men and for women. The moment arms reported are proposed for use in biomechanical models for calculating lumbosacral joint load.
计算机断层扫描在获取肌肉力臂的体内长度方面具有重要价值，这些长度可用于生物力学模型。作者利用计算机断层扫描测量了竖脊肌、腰大肌、腹外斜肌和腹直肌至双侧运动轴（即发生屈伸运动的轴）以及至前后运动轴（即发生侧屈的轴）的肌肉力臂长度，这两个轴均穿过腰骶关节。受试者为21名患者。检查在通用电气CT/T 7800扫描仪上进行。竖脊肌至双侧运动轴的平均力臂为68毫米，这比之前使用的力臂更长。结果还显示，几种肌肉的力臂长度在男性和女性之间存在显著差异。作者得出结论，对于某些肌肉，男性和女性应使用不同的力臂长度。所报告的力臂建议用于计算腰骶关节负荷的生物力学模型中。
