Speaking rate effects on articulatory pattern consistency in talkers with mild ALS.
Speaking rate effects on articulatory pattern consistency in talkers with mild ALS.
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DOI：
10.3109/02699206.2014.908239
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发表时间：
2014-11
影响因子：
1.2
通讯作者：
Green JR
中科院分区：
文献类型：
--
作者：
Mefferd AS;Pattee GL;Green JR
Articulatory pattern variability describes the movement consistency across several repetitions of the same utterance. This study investigated speaking rate effects on articulatory pattern variability in talkers with mild ALS. Fast speech was used to differentiate disease-related and compensatory motor performance changes. Slow speech was used to evaluate therapeutic benefits. Eight talkers with mild ALS and eleven controls participated in this study. Participants produced five repetitions of “Buy Bobby a puppy” at their typical rate, as fast as possible, and at a slow rate. Lower lip and jaw movements were captured using a motion capture system. Talkers with ALS tended to be more variable than controls during fast speech. During typical speech, however, talkers with ALS demonstrated significantly lower articulatory pattern variability than controls. Slow speech elicited elevated levels of articulatory pattern variability in both groups. Increased variability during fast speech suggests that ALS negatively affects the ability to produce highly consistent articulatory movements; however, decreased variability during typical speech indicates a successful adaption to disease-related articulatory limitations. Findings of slow speech did not support the use of rate reductions to enhance this aspect of articulatory performance during the early stages of the ALS.
