Kinematic analyses of speech, orofacial nonspeech, and finger movements in stuttering and nonstuttering adults.
Kinematic analyses of speech, orofacial nonspeech, and finger movements in stuttering and nonstuttering adults.
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DOI：
10.1044/1092-4388(2003/017
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发表时间：
2003-02
期刊：
影响因子：
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通讯作者：
L. Max;A. Caruso;V. Gracco
中科院分区：
文献类型：
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作者：
L. Max;A. Caruso;V. Gracco
这项工作调查了一种假设，即口吃者和非口吃者之间的神经运动差异并不局限于涉及言语产生的运动。运动学数据来自性别和年龄匹配的口吃(n=10)和非口吃(n=10)成年人，在言语运动、口面部非言语运动和手指运动中。在序列长度和目标运动在序列中的位置不同的4种情况下执行所有动作。结果显示，在口吃者和非口吃者之间，在感知流利的语言过程中，嘴唇和下巴闭合(但不是张开)的几个指标上存在统计学上的显著差异。这些差异的大小在不同的话语长度水平上(较短的话语中差异较大)和在话语中目标运动的不同位置上(接近开始的较大差异)而不同。结果进一步表明，口吃组和非口吃组在手指屈曲(但不伸展)运动持续时间和峰值速度潜伏期方面存在统计学差异。总体而言，研究结果表明，口吃和非口吃的个体之间的差异并不局限于言语产生的感觉运动过程，甚至总体上口面部系统的运动。相反，这两组人似乎在不相关的运动系统中，在某些目标定向运动的持续时间上表现出普遍的差异。
This work investigated the hypothesis that neuromotor differences between individuals who stutter and individuals who do not stutter are not limited to the movements involved in speech production. Kinematic data were obtained from gender- and age-matched stuttering (n = 10) and nonstuttering (n = 10) adults during speech movements, orofacial nonspeech movements, and finger movements. All movements were performed in 4 conditions differing in sequence length and location of the target movement within the sequence. Results revealed statistically significant differences between the stuttering and nonstuttering individuals on several measures of lip and jaw closing (but not opening) movements during perceptually fluent speech. The magnitude of these differences varied across different levels of utterance length (larger differences during shorter utterances) and across different locations of the target movement within an utterance (larger differences close to the beginning). Results further revealed statistically significant differences between the stuttering and nonstuttering groups in finger flexion (but not extension) movement duration and peak velocity latency. Overall, findings suggest that differences between stuttering and nonstuttering individuals are not confined to the sensorimotor processes underlying speech production or even movements of the orofacial system in general. Rather, it appears that the groups show generalized differences in the duration of certain goal-directed movements across unrelated motor systems.