Purdue University, West Lafayette, IN, USA
J Speech Lang Hear Res. 2011 Oct;54(5):1247-59. doi: 10.1044/1092-4388(2011/10-0024). Epub 2011 Mar 8.
Individuals with Parkinson's disease (PD) exhibit differences in displacement and velocity of the articulators as compared with older adults. The purpose of the current study was to examine effects of 3 loudness cues on articulatory movement patterns in individuals with PD.
Nine individuals diagnosed with idiopathic PD and 9 age- and sex-matched healthy controls produced sentences in 4 conditions: (a) comfortable loudness, (b) targeting 10 dB above comfortable, (c) twice as loud as comfortable, and (d) in background noise. Lip and jaw kinematics and acoustic measurements were obtained.
Both groups significantly increased sound pressure level (SPL) in the loud conditions as compared with the comfortable condition. For the loud conditions, both groups had the highest SPL in the background noise and the 10 dB conditions, and the lowest SPL in the twice as loud condition. Control participants produced the largest opening displacement in the background noise condition and the smallest opening displacement in the twice as loud condition. Conversely, individuals with PD produced the largest opening displacement in the twice as loud condition and the smallest opening displacement in the background noise condition.
Control participants and individuals with PD responded to cues to increase loudness in different ways. Changes in SPL may explain differences in kinematics for the control participants, but they do not explain such differences for individuals with PD.
与老年人相比，帕金森病（PD）患者的构音器官的位移和速度存在差异。本研究的目的是研究 3 种响度提示对 PD 患者构音运动模式的影响。
9 名被诊断为特发性 PD 的患者和 9 名年龄和性别匹配的健康对照者在 4 种条件下产生句子：（a）舒适响度，（b）目标比舒适响度高 10dB，（c）比舒适响度高两倍，（d）在背景噪声中。获取唇和颌的运动学和声学测量值。
与舒适条件相比，两组在响亮条件下的声压级（SPL）均显著增加。对于响亮条件，两组在背景噪声和 10dB 条件下的 SPL 最高，在两倍响亮条件下的 SPL 最低。对照组在背景噪声条件下产生的开口位移最大，在两倍响亮条件下产生的开口位移最小。相反，PD 患者在两倍响亮的条件下产生的开口位移最大，在背景噪声条件下产生的开口位移最小。
对照组和 PD 患者对响度提示的反应方式不同。SPL 的变化可以解释对照组运动学的差异，但不能解释 PD 患者的差异。
