Yettram A L, Jackman M J
J Biomed Eng. 1982 Apr;4(2):118-24. doi: 10.1016/0141-5425(82)90072-3.
A method of structural analysis is proposed for a model of the thoracic and lumbar spine which involves body weight, external load, muscle forces, intervertebral reactions and disc and ligament elasticity. The procedure consists of three phases: (i) for an initial position the equations of equilibrium are solved using a linear programming technique which minimizes the total force in the system and produces intervertebral reactions and muscle forces, (ii) for an incremental change in configuration a structural analysis is performed to obtain a further set of intervertebral reactions, (iii) with the net values of intervertebral reactions, from combining the results of the previous two phases, a further application of the linear programming technique is made to obtain the muscle forces in the deformed positions. The results are presented for a subject, in a single step of forward flexion.
提出了一种针对胸腰椎模型的结构分析方法，该模型涉及体重、外部负荷、肌肉力量、椎间反应以及椎间盘和韧带弹性。该过程包括三个阶段：(i) 对于初始位置，使用线性规划技术求解平衡方程，该技术可使系统中的总力最小化，并产生椎间反应和肌肉力量；(ii) 对于构型的增量变化，进行结构分析以获得另一组椎间反应；(iii) 结合前两个阶段的结果，利用椎间反应的净值，再次应用线性规划技术以获得变形位置处的肌肉力量。给出了一名受试者在一次前屈步骤中的结果。
