The viscoelastic properties of passive eye muscle in primates. III: force elicited by natural elongations.
The viscoelastic properties of passive eye muscle in primates. III: force elicited by natural elongations.
复制标题
DOI：
10.1371/journal.pone.0009595
复制
发表时间：
2010-03-08
期刊：
影响因子：
3.7
通讯作者：
Optican LM
中科院分区：
文献类型：
--
作者：
Quaia C;Ying HS;Optican LM
我们最近已经表明，在猴子被动眼外肌的力所引起的拉伸不依赖于整个长度的历史，但在很大程度上只是一个功能的最后伸长。这使我们得出结论，冯的准线性粘弹性（QLV）模型，更一般的非线性模型的基础上一个单一的卷积积分，不能忠实地模仿被动的眼肌。在这里，我们提出了更多的数据，在深度麻醉的猴子被动眼肌的机械性能。我们发现，除了上述失败，以前的模型也严重高估了被动眼肌肉在平滑伸长过程中所施加的力，类似于正常眼球运动过程中所经历的。重要的是，我们还表明，肌肉伸长后施加的力在很大程度上与伸长本身无关，并且主要由最终肌肉长度决定。这些额外的发现最终排除了使用经典的粘弹性模型来模拟被动眼肌的机械特性。在这里，我们描述了一个新的模型，扩展了以前的使用来自触变材料的研究原理。这个模型能够合理地解释我们的数据，因此可以被纳入眼睛植物的模型。
We have recently shown that in monkey passive extraocular muscles the force induced by a stretch does not depend on the entire length history, but to a great extent is only a function of the last elongation applied. This led us to conclude that Fung's quasi-linear viscoelastic (QLV) model, and more general nonlinear models based on a single convolution integral, cannot faithfully mimic passive eye muscles. Here we present additional data about the mechanical properties of passive eye muscles in deeply anesthetized monkeys. We show that, in addition to the aforementioned failures, previous models also grossly overestimate the force exerted by passive eye muscles during smooth elongations similar to those experienced during normal eye movements. Importantly, we also show that the force exerted by a muscle following an elongation is largely independent of the elongation itself, and it is mostly determined by the final muscle length. These additional findings conclusively rule out the use of classical viscoelastic models to mimic the mechanical properties of passive eye muscles. We describe here a new model that extends previous ones using principles derived from research on thixotropic materials. This model is able to account reasonably well for our data, and could thus be incorporated into models of the eye plant.
登录
查看更多内容
影响因子：
4.4
作者：
Yoo L;Kim H;Gupta V;Demer JL
通讯作者：
Demer JL
影响因子：
2.5
作者：
OPTICAN, LM;MILES, FA
通讯作者：
MILES, FA
影响因子：
2.4
作者：
Nekouzadeh, Ali;Pryse, Kenneth M.;Elson, Elliot L.;Genin, Guy M.
通讯作者：
Genin, Guy M.
影响因子：
4
作者：
Zaaimi B;Ruiz-Torres R;Solla SA;Miller LE
通讯作者：
Miller LE
影响因子：
3.1
作者：
ACIERNO, D;LAMANTIA, FP;TITOMANLIO, G
通讯作者：
TITOMANLIO, G