A three-dimensional model of vocal fold abduction/adduction
A three-dimensional model of vocal fold abduction/adduction
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DOI：
10.1121/1.1652033
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发表时间：
2004-04-01
影响因子：
2.4
通讯作者：
Alipour, F
中科院分区：
文献类型：
--
作者：
Hunter, EJ;Titze, IR;Alipour, F
建立了组织变形的三维生物力学模型，用于模拟动态声带的外展和内收。该模型由1721个几乎不可压缩的有限元组成。建立了类似于两个同心圆柱体的摆动-滑动运动模型。声带韧带和甲颧肌的纤维特性被实施为纤维-凝胶复合材料，该复合材料由嵌入纤维的各向同性基质制成。这些纤维具有收缩和/或被动的非线性应力-应变特性。通过将运动范围和速度与已发表的声带运动学数据进行比较，对模型进行了验证。该模型模拟了最大声门角度约为31度的外展。该模型使用环鳗后肌，产生了每秒405度的角度外展速度。在峰值速度和反应时间上，系统力学似乎都倾向于外展而不是内收，即使所有的内在肌肉特性保持不变。该模型还验证了这样一个概念，即甲状旁肌的声门部分和肌肉部分在姿势中扮演着显著不同的角色，而肌肉部分对颧骨运动的影响更大。此外，还对外展/内收的机制提出了其他见解。(C)2004年美国声学学会。
A three-dimensional biomechanical model of tissue deformation was developed to simulate dynamic vocal fold abduction and adduction. The model was made of 1721 nearly incompressible finite elements. The cricoarytenoid joint was modeled as a rocking-sliding motion, similar to two concentric cylinders. The vocal ligament and the thyroarytenoid muscle's fiber characteristics were implemented as a fiber-gel composite made of an isotropic ground substance imbedded with fibers. These fibers had contractile and/or passive nonlinear stress-strain characteristics. The verification of the model was made by comparing the range and speed of motion to published vocal fold kinematic data. The model simulated abduction to a maximum glottal angle of about 31degrees. Using the posterior-cricoarytenoid muscle, the model produced an angular abduction speed of 405degrees per second. The system mechanics seemed to favor abduction over adduction in both peak speed and response time, even when all intrinsic muscle properties were kept identical. The model also verified the notion that the vocalis and muscularis portions of the thyroarytenoid muscle play significantly different roles in posturing, with the muscularis portion having the larger effect on arytenoid movement. Other insights into the mechanisms of abduction/adduction were given. (C) 2004 Acoustical Society of America.