Babbling and Chewing: Jaw Kinematics from 8 to 22 months.
Babbling and Chewing: Jaw Kinematics from 8 to 22 months.
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DOI：
10.1016/j.wocn.2010.05.001
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发表时间：
2010-07-01
影响因子：
1.9
通讯作者：
Steeve, Roger W.
中科院分区：
文献类型：
--
作者：
Steeve, Roger W.
经验的差距仍然存在关于婴儿下颌运动学观察自然发生的事件期间的咀嚼和前语言发声在第一个2年的生活。垂直颌位移测量从一个典型的发展中的婴儿从8至22个月。婴儿下颌运动学测量元音牙牙学语，非杂色和杂色牙学语，咀嚼。结果表明，咀嚼的运动变异性的措施显着低于所有的咿呀学语类别。这些指标随咀嚼年龄的变化而变化：（a）下颌垂直高度峰值的变异性降低，而（B）下颌位移和（c）运动速度的变异性增加。元音混语的运动学特征是下颌位移较小，平均垂直下颌位置高于其他混语类型和咀嚼。在发展过程中，牙牙学语的颌运动学改变了颌位移和平均垂直颌位。这些变化与元音牙牙学语产生的事件减少和杂色牙学语和重叠音节的事件增加有关。这些结果表明，发展过程，如非重叠的任务要求可能区分的下颌运动的轨迹，婴儿咀嚼和牙牙学语。婴儿牙牙学语的下巴运动学无法通过观察成人说话者或观察婴儿或成人的非言语行为来预测。
Empirical gaps remain regarding infant mandibular kinematics observed during naturally occurring episodes of chewing and pre-linguistic vocalizations during the first 2-years of life. Vertical jaw displacement was measured from a typically developing infant from 8 to 22 months. Infant jaw kinematics was measured for vowel babble, non-variegated and variegated babble, and chewing. Results indicated that measures of kinematic variability were significantly less for chewing than all babble categories. These measures changed across age for chewing: (a) peak vertical jaw elevation decreased in variability, while (b) jaw displacement and (c) speed of movement increased in variability. Kinematics for vowel babble were characterized as exhibiting less jaw displacement with higher average vertical jaw position than other babble types and chewing. Developmentally, jaw kinematics for babble changed for jaw displacement and average vertical jaw position. These changes were related to decreased episodes for vowel babble productions and increased episodes for variegated babble and reduplicative syllables. These results suggest that developmental processes such as non-overlapping task-demands likely differentiate trajectories of jaw movement for infant chewing and babble. Infant jaw kinematics for babble cannot be predicted from observations of adult speakers or from non-speech behaviors observed for infants or adults.
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影响因子：
2.6
作者：
Green, JR;Moore, CA;Steeve, RW
通讯作者：
Steeve, RW
影响因子：
9.2
作者：
GRILLNER S
通讯作者：
GRILLNER S
影响因子：
0.9
作者：
Meier, RP;McGarvin, L;Willerman, R
通讯作者：
Willerman, R
影响因子：
56.9
作者：
DELCOMYN, F
通讯作者：
DELCOMYN, F
影响因子：
2.5
作者：
Green, JR;Moore, CA;VanWitzenburg, MJ
通讯作者：
VanWitzenburg, MJ