Dynamic aspects of lower lip movement in parkinsonian and neurologically normal geriatric speakers' production of stress.
Dynamic aspects of lower lip movement in parkinsonian and neurologically normal geriatric speakers' production of stress.
复制标题
帕金森病和神经正常老年说话者产生压力时下唇运动的动态方面。
DOI：
10.1044/jshr.3802.260
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Weismer,G
中科院分区：
文献类型：
--
作者：
Forrest,K;Weismer,G
在交替应力对比的生产过程中，对帕金森氏症构音障碍和年龄匹配的神经学正常的扬声器的下唇+下颌运动进行了评估。离散措施的运动，包括位移幅度，峰值速度，幅度与峰值速度的关系，和运动持续时间进行了比较，各组的强调和非强调音节。此外，定量（参数和加减速比）和定性指标的动态特性的下唇+下巴张开和关闭的姿态的速度分布进行了比较，在受试者群体。在构音障碍组，每个离散和动态运动学参数和构音障碍的严重程度之间的关系进行了研究。离散措施证实了先前的研究结果，减少位移和峰值速度的帕金森氏症的发言者在开放和关闭的手势，无论是强调和非强调的音节。然而，幅度和速度之间的关系并没有不同的两个主题组的任何手势。运动持续时间是相等的两组在生产过程中的开放姿态，但显着较短的帕金森氏症的发言者在关闭手势。速度曲线的定量指标也未能区分受试者组之间或构音障碍的扬声器作为严重程度的函数。相比之下，定性描述的速度配置文件显示扬声器之间的差异，更严重的构音障碍的主题更明显。这些质的差异是明显的开放姿态对一个非重读元音，只有。
Lower lip+jaw movement was evaluated for parkinsonian dysarthric and age-matched, neurologically normal speakers during the production of alternating stress contrasts. Discrete measures of movement, including displacement amplitude, peak velocity, the relation of amplitude to peak velocity, and movement durations were compared across groups for stressed and unstressed syllables. Additionally, quantitative (parametercand the ratio of acceleration to deceleration) and qualitative indices of dynamic characteristics of velocity profiles for lower lip+jaw opening and closing gestures were compared across the subject groups. Within the dysarthric group, the relation between each discrete and dynamic kinematic parameter and the perceived severity of the dysarthria was investigated. The discrete measures confirmed previous findings of reduced displacement and peak velocity for the parkinsonian speakers during opening and closing gestures for both the stressed and unstressed syllables. However, the relation between amplitude and velocity did not differ for the two subject groups for any gesture. Movement durations were equivalent for the two groups during the production of opening gestures, but were significantly shorter for the parkinsonian speakers during closing gestures. Quantitative indices of the velocity profiles also failed to differentiate between the subject groups or between dysarthric speakers as a function of severity. By contrast, the qualitative descriptions of the velocity profiles showed between-speaker differences that were more pronounced for subjects with more severe dysarthria. These qualitative differences were evident in opening gestures toward an unstressed vowel, only.