As the speech apparatus is also involved in producing non-speech movements, understanding whether speech and non-speech planning are controlled by the same brain mechanisms is central to the comprehension of motor speech planning. A crucial issue is whether a specialized motor planning/control system is dedicated to speech or if the motor planning/control system is shared across oromotor behaviors. We investigated the EEG/ERP spatio-temporal dynamics of the motor planning processes preceding articulation by comparing the production of non-speech gestures matched to monosyllabic words and non-words. To isolate motor from pre-motor planning, we used a delayed production task combined with an articulatory suppression task. Results suggest that the planning processes preceding articulation for non-speech, words and non-words recruit the same neural networks but with different involvement for non-speech and speech. The results support the idea of shared motor planning/control systems for speech and non-speech but with different dynamics for each oromotor behavior.

中文翻译：

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言语和非言语运动规划的神经动力学

由于语音装置也参与产生非语音运动，因此了解语音和非语音规划是否由相同的大脑机制控制是理解运动语音规划的核心。一个关键问题是专门的运动规划/控制系统是否专用于语音，或者运动规划/控制系统是否在口运动行为之间共享。我们通过比较与单音节单词和非单词匹配的非语音手势的产生，研究了发音前运动规划过程的 EEG/ERP 时空动态。为了将运动与运动前规划分离，我们使用了延迟生产任务与发音抑制任务相结合。结果表明，非语音清晰度之前的规划过程，单词和非单词招募相同的神经网络，但对非语音和语音的参与程度不同。结果支持语音和非语音共享运动规划/控制系统的想法，但每种口部运动行为具有不同的动态。