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Evaluation and Improvement of Oral Function by Analysis of Speech Articulatory and Masticatory Orofacial Movements

通过分析言语发音和咀嚼口面部运动来评估和改善口腔功能

基本信息

批准号：
07457477
负责人：
YAMAGATA Kensuke
金额：
$ 4.03万
依托单位：
Showa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07457477/
关键词：
masticatio speech orofacial movements motion analysis motions capture retro-reflective marker 3D trajectory autotracking

项目摘要

Oral movement trajectories were studied by monitoring orofacial movements during pronunciation and mastication.Methods : Retro-reflective markers that were recorded as reflective points with clear outlines when illuminated with infrared strobe lights provided trajectory data at the following reference points : modiolus (Mo) ; menton (Me) ; and incisal point (IP). The subjects'facial markers were located and automatically tracked while speaking and chewing using six video cameras from six different perspectives, and the video data were collected using a Datastation (Vicon 370.Oxford Metorics Ltd.). The results of photogramtric measurement during pronunciation of each tested consonant and chewing phase were analyzed using a 3D analyzer (Movias 3D,nac Co.) with reference to the following parameters : total length of the trajectory from start to finish (TL) ; distance between the start and finish of the trajectory (SL) ; TL to SL ratio (T/S) ; volume of the rectangular solid encompassing the entire trajectory (Cud) ; and the mean of the 3D angles created by differences in the direction of the preceding and subsequent trajectories for each measured time (TH).Results : (1) Specific trajectories were seen during pronunciation of [s], [m] and [*] among other constants and vowels in the test sentence. (2) Elapsed times in one chewing cycle and closing phase were decreased. In addition, the range of orofacial movements in the closing phase became narrower and all trajectories became smoother as mastication proceeded.

口腔运动轨迹进行了研究，通过监测orofacial运动在发音和mastication.Methods：回射标记，被记录为具有清晰的轮廓反射点时，用红外频闪灯照明提供轨迹数据在以下参考点：蜗轴（Mo），门顿（Me），和切点（IP）。在说话和咀嚼时，使用六个摄像机从六个不同的角度定位并自动跟踪受试者的面部标记，并且使用Datastation（Vicon 370，Oxford Metorics Ltd.）收集视频数据。使用3D分析仪（Movias 3D，nac Co.）参照以下参数：轨迹从开始到结束的总长度（TL）;轨迹的开始和结束之间的距离（SL）; TL与SL的比率（T/S）;包围整个轨迹的长方体的体积（Cud）;以及由每个测量时间（TH）的先前和后续轨迹的方向上的差异产生的3D角度的平均值。（1）测试句子中[s]、[m]和[*]等常量和元音的发音过程中出现了特定的轨迹。(2)一个咀嚼周期和闭合期的耗时减少。此外，随着咀嚼的进行，闭合期的口面运动范围变窄，所有运动轨迹变得更平滑。