Runnqvist Elin, Chanoine Valérie, Strijkers Kristof, Pattamadilok Chotiga, Bonnard Mireille, Nazarian Bruno, Sein Julien, Anton Jean-Luc, Dorokhova Lydia, Belin Pascal, Alario F-Xavier
Aix-Marseille Université, CNRS, LPL, Aix-en-Provence 13100, France.
Aix-Marseille Université, Inserm, INS 13005, Marseille, France.
Cereb Cortex Commun. 2021 May 31;2(2):tgab038. doi: 10.1093/texcom/tgab038. eCollection 2021.
An event-related functional magnetic resonance imaging study examined how speakers inspect their own speech for errors. Concretely, we sought to assess 1) the role of the temporal cortex in monitoring speech errors, linked with comprehension-based monitoring; 2) the involvement of the cerebellum in internal and external monitoring, linked with forward modeling; and 3) the role of the medial frontal cortex for internal monitoring, linked with conflict-based monitoring. In a word production task priming speech errors, we observed enhanced involvement of the right posterior cerebellum for trials that were correct, but on which participants were more likely to make a word as compared with a nonword error (contrast of internal monitoring). Furthermore, comparing errors to correct utterances (contrast of external monitoring), we observed increased activation of the same cerebellar region, of the superior medial cerebellum, and of regions in temporal and medial frontal cortex. The presence of the cerebellum for both internal and external monitoring indicates the use of forward modeling across the planning and articulation of speech. Dissociations across internal and external monitoring in temporal and medial frontal cortex indicate that monitoring of overt errors is more reliant on vocal feedback control.
一项与事件相关的功能磁共振成像研究考察了说话者如何检查自己的言语是否出错。具体而言，我们试图评估：1）颞叶皮质在监测言语错误中的作用，这与基于理解的监测有关；2）小脑在内部和外部监测中的参与情况，这与前向模型有关；3）内侧额叶皮质在内部监测中的作用，这与基于冲突的监测有关。在一个引发言语错误的单词生成任务中，我们观察到，对于正确但与非单词错误相比参与者更可能说出一个单词的试验（内部监测对比），右侧后小脑的参与度增强。此外，将错误与正确话语进行比较（外部监测对比）时，我们观察到相同的小脑区域、小脑上内侧以及颞叶和内侧额叶皮质区域的激活增加。小脑参与内部和外部监测表明在言语的计划和发音过程中使用了前向模型。颞叶和内侧额叶皮质在内部和外部监测中的分离表明，对明显错误的监测更依赖于声音反馈控制。
