Differential articulatory movements during Japanese /s/ and /t/ as revealed by MR image sequences with tooth visualization
Differential articulatory movements during Japanese /s/ and /t/ as revealed by MR image sequences with tooth visualization
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DOI：
10.1016/j.archoralbio.2011.11.002
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发表时间：
2012-06-01
影响因子：
3
通讯作者：
Moriyama, Keiji
中科院分区：
文献类型：
--
作者：
Ng, Inn Wo;Ono, Takashi;Moriyama, Keiji
目的：为了评估在口腔前部的发音之间的时空关系，在生产日本摩擦音和爆破音的关节使用我们提出的方法在MR图像sequences.Design牙齿可视化：10名健康成人没有错牙合参与了这项研究。制作了定制的上颌和下颌骨板，在中切牙周围留有间隙，并填充MR兼容的造影剂。在通过电影磁共振成像（MRI）技术获取图像的过程中，受试者重复元音辅音和元音音节（/阿萨/和/ata/），而不戴盘子。然后，受试者戴上牙齿成像板。所有数据均在正中矢状面采集。使用标志物叠加牙齿边界。测量了舌重心（CoG）的几个参数和时空变化。结果如下：在/t/期间，舌-腭/切牙接触的持续时间和量显著大于/s/期间，舌-上颌切牙-下颌切牙之间的内切圆半径显著小于/s/期间。在最大收缩期间，/t/的舌CoG也比/s/更靠前。时空变化的CoG的舌头之间/阿萨/和/ata/。结论：我们得出结论，增加舌腭/切牙接触和更大的前关闭是必要的生产日本/t/相比/s/。随着使用这种新的方法在MR图像序列中的牙齿可视化，它应该是可能的，以评估在讲话过程中的牙齿和其他发音器官的相互作用。(C)2011爱思唯尔有限公司保留所有权利。
Objective: To evaluate the spatio-temporal relationships between articulators in the anterior oral cavity, during the production of Japanese fricative and plosive articulation using our proposed method for tooth visualization in MR image sequences.Design: Ten healthy adults without malocclusion participated in the study. Customized maxillary and mandibular plates with space around the central incisors that was to be filled with MR-compatible contrast medium were made. During image-acquisition by a cine magnetic resonance imaging (MRI) technique, the subjects repeated vowel consonant vowel syllables (/asa/ and /ata/) without wearing the plates. The subjects then wore the plates for tooth imaging. All data were acquired in the midsagittal plane. Tooth boundaries were superimposed using landmarks. Several parameters and spatio-temporal changes in the centre of gravity (CoG) of the tongue were measured. Results: During /t/, the duration and amount of tongue-to-palate/incisor contact were significantly greater and the radius of the inscribed circle between the tongue maxillary incisor mandibular incisor was significantly shorter than those during /s/. /t/ also had a more anteriorly located CoG of the tongue than /s/ during maximum constriction. The spatio-temporal changes in the CoG of the tongue were significantly different between /asa/ and /ata/.Conclusions: We conclude that increased tongue-to-palate/incisor contact and greater anterior closure are necessary for the production of Japanese /t/ compared to /s/. With the use of this new method for tooth visualization in MR image sequences, it should be possible to evaluate the interaction of teeth and other articulators during speech. (C) 2011 Elsevier Ltd. All rights reserved.