Application of spherical and cylindrical wrapping algorithms in a musculoskeletal model of the upper limb
Application of spherical and cylindrical wrapping algorithms in a musculoskeletal model of the upper limb
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DOI：
10.1016/s0021-9290(01)00074-4
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发表时间：
2001-09-01
影响因子：
2.4
通讯作者：
Johnson, GR
中科院分区：
文献类型：
--
作者：
Charlton, IW;Johnson, GR
在上肢的建模中，许多肌肉不能表示为从起点到插入点的直线，因为复杂的形态使它们缠绕在被动结构周围。大多数构成这些障碍物的骨骼轮廓可以被描述为简单的几何形状，如球体和圆柱体，一种新的肌肉路径参数化技术已经被开发用于上肢模型。新方法涉及移动坐标系的定义，其中包裹的肌肉的路径不移动，允许简化规范。此外，围绕一个圆柱体的包裹路径的分析计算提出了在以前的近似方法。肌肉力矩臂预先计算从矢量的考虑和SIMM内的肌腱偏移。两者之间的密切的协议表明，所提出的实现准确地遵循理论关系，并可以使用的信心在肌肉骨骼模型。(C)2001爱思唯尔科技有限公司版权所有。
In the modelling of the upper limb, many muscles cannot be represented as a straight line from origin to insertion due to the complex morphology causing them to wrap around passive structures. The majority of bony contours that form these obstructions can be described adequately as simple geometric shapes such as spheres and cylinders.A novel technique for the parameterisation of muscle paths as they wrap around such shapes has been developed for use in an upper limb model. The new method involves the definition of moving co-ordinate systems in which the path of a wrapped muscle does not move, allowing simplified specification. In addition, an analytical calculation of the wrapping path around a cylinder is presented over previous approximate methods.Muscle moment arms were pre-calculated from vector considerations and within SIMM by tendon excursion. Close agreement between the two suggests that the proposed implementations accurately follow the theoretical relationship and can be used with confidence in musculoskeletal models. (C) 2001 Elsevier Science Ltd. All rights reserved.