用计算分析理解手指屈肌腱滑车系统
Comprehending finger flexor tendon pulley system using a computational analysis
摘要：
现有的假肢/矫形器设计很少基于生物手指的运动静力学，特别是其肌腱滑轮系统（TPS），其有助于呈现一组非凡的功能。计算模型或尸体实验的研究确实存在。然而，他们提供的TPS配置，导致较低的肌腱张力，bowstringing，滑轮应力，所有这些生物手指可能会采用毕竟信息很少。此类配置和相关联的权衡的先验知识不仅从例如外骨骼的设计观点来看是有帮助的，而且对于外科重建程序也是有帮助的。我们提出了一个参数研究，以确定最佳TPS配置的Flexor机制。一个顺应性，弯曲为基础的计算模型的开发和模拟使用伪刚体方法，与各种组合的滑轮/肌腱附件点定位，滑轮的高度和宽度。从收集的数据中进行扣除，以推荐最合适的配置。生物TPS配置的许多方面通过所提出的分析进行了解释。我们认为，这里的分析方法将是有用的，在定制（优化）的手外骨骼设计。
英文摘要：
Existing prosthetic/orthotic designs are rarely based on kinetostatics of a biological finger, especially its tendon-pulley system (TPS) which helps render a set of extraordinary functionalities. Studies on computational models or cadaver experiments do exist. However, they provide little information on TPS configurations that lead to lower tendon tension, bowstringing, and pulley stresses, all of which a biological finger may be employing after all. A priori knowledge of such configurations and associated trade-offs is helpful not only from the design viewpoint of, say, an exoskeleton but also for surgical reconstruction procedures. We present a parametric study to determine optimal TPS configurations for the flexor mechanism. A compliant, flexure-based computational model is developed and simulated using the pseudo rigid body method, with various combinations of pulley/tendon attachment point locations, pulley heights, and widths. Deductions are drawn from the data collected to recommend the most suitable configuration. Many aspects of the biological TPS configuration are explained through the presented analysis. We reckon that the analytical approach herein will be useful in arriving at customized (optimized) hand exoskeletal designs.
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