Mailend Marja-Liisa, Maas Edwin, Beeson Pélagie M, Story Brad H, Forster Kenneth I
Department of Speech, Language, and Hearing Sciences, The University of Arizona, Tucson, AZ, USA.
Marja-Liisa Mailend is now at Moss Rehabilitation Research Institute, Einstein Healthcare Network, Elkins Park, PA, USA.
Cogn Neuropsychol. 2021 Feb;38(1):72-87. doi: 10.1080/02643294.2020.1847059. Epub 2020 Nov 29.
This study investigated the underlying nature of apraxia of speech (AOS) by testing two competing hypotheses. The argues that people with AOS can plan speech only one syllable at a time Rogers and Storkel [1999. Planning speech one syllable at a time: The reduced buffer capacity hypothesis in apraxia of speech. , (9-11), 793-805. https://doi.org/10.1080/026870399401885]. The states that selecting a motor programme is difficult in face of competition from other simultaneously activated programmes Mailend and Maas [2013. Speech motor programming in apraxia of speech: Evidence from a delayed picture-word interference task. , (2), S380-S396. https://doi.org/10.1044/1058-0360(2013/12-0101)]. Speakers with AOS and aphasia, aphasia without AOS, and unimpaired controls were asked to prepare and hold a two-word utterance until a go-signal prompted a spoken response. Phonetic similarity between target words was manipulated. Speakers with AOS had longer reaction times in conditions with two similar words compared to two identical words. The Control and the Aphasia group did not show this effect. These results suggest that speakers with AOS need additional processing time to retrieve target words when multiple motor programmes are simultaneously activated.
本研究通过检验两种相互竞争的假设，调查了言语失用症（AOS）的潜在本质。罗杰斯和斯托克尔[1999年。一次计划一个音节的言语：言语失用症中缓冲能力降低的假设。，（9 - 11），793 - 805。https://doi.org/10.1080/026870399401885]认为，患有AOS的人一次只能计划一个音节的言语。梅林德和马斯[2013年。言语失用症中的言语运动编程：来自延迟图片 - 单词干扰任务的证据。，（2），S380 - S396。https://doi.org/10.1044/1058 - 0360(2013/12 - 0101)]指出，面对来自其他同时激活的程序的竞争，选择运动程序很困难。患有AOS和失语症的说话者、无AOS的失语症患者以及未受损的对照组被要求准备并保持一个双词话语，直到一个开始信号促使他们做出言语反应。对目标词之间的语音相似性进行了操控。与两个相同的词相比，患有AOS的说话者在两个相似词的条件下反应时间更长。对照组和失语症组没有表现出这种效应。这些结果表明，当多个运动程序同时被激活时，患有AOS的说话者需要额外的处理时间来检索目标词。
