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

通过监测发音和咀嚼时的口面部运动来研究口腔运动轨迹。方法：用红外频闪灯照射后，将反射标记物记录为轮廓清晰的反射点，提供以下参考点的轨迹数据：modiolus (Mo)；曼顿（我）；和切点（IP）。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在说话和咀嚼时的面部标记，并使用Datastation （Vicon 370）收集视频数据。牛津地铁有限公司)。使用3D分析仪（Movias 3D,nac Co.）对每个被测辅音发音和咀嚼阶段的照相测量结果进行分析，参考以下参数：从开始到结束的轨迹总长度（TL）；轨迹起点与终点之间的距离（SL）；TL /S；包围整个轨迹的矩形实体的体积（Cud）；以及每个测量时间（TH）的前后轨迹方向差异所产生的三维角度的平均值。结果：(1)测试句中[s]、[m]、[*]等常量和元音的发音有特定的轨迹。(2)一个咀嚼周期和闭合阶段的时间缩短。此外，随着咀嚼的进行，关闭阶段的口面部运动范围变得更窄，所有轨迹都变得更平滑。

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.