Kuruvilla-Dugdale Mili, Chuquilin-Arista Miguel
a Department of Communication Science and Disorders , University of Missouri , Columbia , MO , USA.
b Department of Neurology , University of Florida , Gainesville , FL , USA.
Clin Linguist Phon. 2017;31(10):725-742. doi: 10.1080/02699206.2017.1318173. Epub 2017 May 11.
Amyotrophic lateral sclerosis (ALS) affects the speech motor system and causes a substantial decline in intelligibility. Clear speech strategies have been found to benefit intelligibility in talkers with dysarthria and the purpose of this study was to examine clear speech effects on tongue, lip, and jaw movements in persons with ALS and healthy controls. For this purpose, participants produced 10 repetitions of the sentence 'I owe you a yoyo' using both habitual and clear speech. Movement variability as well as maximum speed, range, and duration of movement of the articulators were obtained for both conditions. The results show significantly lower jaw movement variability during habitual speech but greater variability for clear speech in ALS relative to controls. The kinematic data was consistent with expectations for individuals with dysarthria. Based on these results, clear speech may be considered a mode of speech that produces high movement variability in talkers with ALS.
肌萎缩侧索硬化症（ALS）会影响言语运动系统，并导致可懂度大幅下降。已发现清晰言语策略对构音障碍患者的可懂度有益，本研究的目的是检查清晰言语对ALS患者和健康对照者舌头、嘴唇和下颌运动的影响。为此，参与者使用习惯性言语和清晰言语重复说出句子“I owe you a yoyo”10次。在两种情况下均获得了运动变异性以及发音器官的最大速度、运动范围和持续时间。结果显示，与对照组相比，ALS患者在习惯性言语期间下颌运动变异性显著降低，但在清晰言语时变异性更大。运动学数据与构音障碍患者的预期一致。基于这些结果，清晰言语可能被认为是一种会使ALS患者产生高运动变异性的言语模式。
