基于核磁共振成像和有限元建模的嘴唇前突机制的研究

发布时间：2018-07-07 09:17

本文选题：嘴唇前突 + 口轮匝肌　；参考：《天津大学》2016年硕士论文

【摘要】：嘴唇是人类的发音器官之一,不仅可以辅助产生语音,还可以在视觉上辅助听众对言语进行感知。因此对于嘴唇运动及其变形机制的研究是语音生成领域的一个重要方面,对于揭示人类语音产生的基本控制原理有着非常重要的意义。目前国内外对于嘴唇的运动及其生理控制机制的研究非常有限,还没有研究成果可以合理的揭示嘴唇的运动是如何产生的,特别是对于嘴唇前突的动作,其生理控制机制长期以来一直都没有被发现。嘴唇产生运动的方式与舌头是类似的,它们都是依靠肌肉的收缩引起软组织产生形变而运动,而不依靠人类的骨骼系统。目前最有效的探究人类发音器官的生理控制机制的手段是通过构建生理模型的方法进行生物力学仿真。本课题的主要目的是基于肌肉可视化和构建生理模型的方法探究嘴唇前突的生理控制机制。通过对国内外相关研究成果的分析研究,我们提出了一个嘴唇前突的可能的生理控制机制,在口周肌肉群中,我们重点关注口轮匝肌的唇周部,因为它更靠近口腔侧的唇组织,这样的几何形态预示着它的收缩会引起嘴唇内侧和外侧唇组织不同比例的收缩。为了验证我们提出的嘴唇前突的生理控制机制,本文通过物理实验和有限元分析的方法对口轮匝肌唇周部的生理作用进行了分析,并基于高清的核磁共振图像提取了下唇和下颚的生理形态,在ArtiSynth平台上构建了下唇-下颚的动态的三维复合生理模型。
[Abstract]:Lips are one of the speech organs of human beings, which can not only help to produce speech, but also help listeners to perceive speech visually. Therefore, the study of lip movement and its deformation mechanism is an important aspect in the field of speech production, and it is of great significance to reveal the basic control principle of human speech production. At present, the research on the movement of lips and its physiological control mechanism is very limited at home and abroad, and no research results can reasonably reveal how the movement of lips is produced, especially for the movement of lip protrusions. Its physiological control mechanism has not been discovered for a long time. The lips move in a similar way to the tongue. They move on the basis of soft tissue deformation caused by muscle contraction, rather than on the human skeletal system. At present, the most effective way to explore the physiological control mechanism of human vocal organs is to construct physiological models for biomechanical simulation. The main purpose of this study is to explore the physiological control mechanism of anterior lip protrusion based on muscle visualization and physiological modeling. Through the analysis of the related research results at home and abroad, we put forward a possible physiological control mechanism of anterior lip protrusion. In the perioral muscle group, we focus on the labial part of orbicularis oris muscle because it is closer to the labial tissue of the oral side. This geometry indicates that its contraction will cause different proportions of contraction in the medial and lateral lip tissues of the lips. In order to verify the physiological control mechanism of anterior lip protrusion proposed by us, the physical experiment and finite element analysis were used to analyze the physiological function of the lip around the orbicularis oris muscle. Based on the high-definition MRI images, the physiological morphology of the lower lip and the lower jaw was extracted, and the dynamic three-dimensional composite physiological model of the lower lip and the lower jaw was constructed on the ArtiSynth platform.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：R33;TP391.41

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