Spatial and temporal lingual coarticulation and motor control in preadolescents.
Spatial and temporal lingual coarticulation and motor control in preadolescents.
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青春期前儿童的空间和时间舌协同发音和运动控制。
DOI：
10.1044/2014_jslhr-s-11-0350
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Zharkova N
中科院分区：
文献类型：
--
作者：
Zharkova N
本研究比较了青春期前儿童和成人的舌面协同发音和舌面运动学，以确定青春期前和成人的舌位是否具有更大程度的随机变异性，以及他们的舌面协同发音模式是否与成年人不同。方法记录15名儿童(10-12岁)和15名成人的高速超声舌形数据。用辅音/S/和/ʃ/对/a/、/i/和/a/舌形曲线的9个归一化时间点进行舌形轮廓分析。在出现显著元音效应的情况下，两组的协同发音量相似。但青春期前/ʃ/出现协同发音效应的时间明显晚于青春期前/S/，也晚于成年/S/和/ʃ/。结论青春期前期儿童舌位的空间特征具有成人式的舌控精度和成人式的预期性协同发音。然而，在某些复杂的舌头运动的运动编程方面仍然存在一些不成熟的地方。
PurposeIn this study, the authors compared coarticulation and lingual kinematics in preadolescents and adults in order to establish whether preadolescents had a greater degree of random variability in tongue posture and whether their patterns of lingual coarticulation differed from those of adults.MethodHigh-speed ultrasound tongue contour data synchronized with the acoustic signal were recorded from 15 children (ages 10–12 years) and 15 adults. Tongue shape contours were analyzed at 9 normalized time points during the fricative phase of schwa-fricative-/a/ and schwa-fricative-/i/ sequences with the consonants /s/ and /ʃ/.ResultsThere was no significant age-related difference in random variability. Where a significant vowel effect occurred, the amount of coarticulation was similar in the 2 groups. However, the onset of the coarticulatory effect on preadolescent /ʃ/ was significantly later than on preadolescent /s/, and also later than on adult /s/ and /ʃ/.ConclusionsPreadolescents have adult-like precision of tongue control and adult-like anticipatory lingual coarticulation with respect to spatial characteristics of tongue posture. However, there remains some immaturity in the motor programming of certain complex tongue movements.
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