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首页> 外文期刊>Journal of speech, language, and hearing research: JSLHR >Indirect estimates of jaw muscle tension in children with suspected hypertonia, children with suspected hypotonia, and matched controls
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Indirect estimates of jaw muscle tension in children with suspected hypertonia, children with suspected hypotonia, and matched controls

机译：疑似高渗症儿童，疑似低渗症儿童和对照者的颌骨肌肉张力的间接估计

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Purpose: In this study, the authors compared indirect estimates of jaw-muscle tension in children with suspected muscle-tone abnormalities with age- and gender-matched controls. Method: Jaw movement and muscle activation were measured in children (ages 3 years, 11 months, to 10 years) with suspected muscle-tone abnormalities (Down syndrome or spastic cerebral palsy; n = 10) and controls (n = 11). Two measures were used to infer jaw tension: a kinematic index of mass-normalized stiffness and electromechanical delay (EMD). The kinematic index used video-based kinematics to obtain the slope of the peak velocitydisplacement relationship. The EMD was derived from the interval between the onset of suprahyoid muscle activity and the onset of jaw depression. Results: Neither measure differentiated the groups. The kinematic index revealed differences between stressed and unstressed palsy and controls, but not in 2-syllable productions by the participants with Down syndrome and controls. Conclusion: This preliminary investigation included the novel application of 2 measures to infer the jaw-muscle tension of children with suspected tone abnormalities. Although the results do not support the hypothesis that suspectedmuscle-tone abnormalities affect jaw movement sufficiently to influence speech production, considerations for interpreting the findings include methodological limitations and possible compensatory muscle coactivation.
机译：目的：在这项研究中，作者将怀疑患有肌音异常的儿童与年龄和性别相匹配的对照组的下颌肌肉张力的间接估计值进行了比较。方法：对怀疑有肌音异常（唐氏综合症或痉挛性脑瘫; n = 10）和对照组（n = 11）的儿童（3岁，11个月至10岁）进行下颌运动和肌肉激活测量。两种方法可用来推断颌骨拉力：质量归一化刚度的运动学指标和机电延迟（EMD）。运动学指标使用基于视频的运动学来获得峰值速度位移关系的斜率。 EMD是从上睑下垂肌活动开始与下颌开始发作之间的时间间隔得出的。结果：两种方法均未区分组。运动学指标显示了重度和非重度麻痹与对照组之间的差异，但唐氏综合症和对照组的2个音节的产生没有差异。结论：这项初步调查包括两种方法的新应用，以推断疑似音调异常儿童的下颌肌肉张力。尽管结果不支持可疑的肌音异常会影响下颌运动以充分影响言语产生的假说，但解释该发现的考虑因素包括方法学限制和可能的代偿性肌肉共激活。

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