Seeing and hearing speech excites the motor system involved in speech production
Seeing and hearing speech excites the motor system involved in speech production
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DOI：
10.1016/s0028-3932(02)00316-0
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发表时间：
2003-01-01
期刊：
影响因子：
2.6
通讯作者：
Paus, T
中科院分区：
文献类型：
--
作者：
Watkins, KE;Strafella, AP;Paus, T
对动作的感知与运动区域的活动增加有关，这意味着这些区域参与了对动作的识别、理解和模仿。我们研究的可能性，语音感知，听觉和视觉，也会导致运动系统的兴奋性的变化，潜在的语音生产。经颅磁刺激应用于初级运动皮层的面部区域，以引起唇部肌肉的运动诱发电位。运动诱发电位的大小进行了比较，在以下条件下：听语音，听非语言的声音，观看语音相关的嘴唇运动，并观看眼睛和眉毛的运动。与控制条件相比，听和看语音增强运动诱发电位的大小。这种效应只在刺激左半球时才出现，而刺激右半球在任何条件下都不会引起运动诱发电位的变化。在对照实验中，在右手肌肉中引起的运动诱发电位的大小在不同条件下没有差异，这表明与语言相关的兴奋性变化是特定于嘴唇肌肉的。这些结果提供了证据表明，听觉和视觉言语知觉促进参与言语产生的运动系统的兴奋性。(C)2003爱思唯尔科技有限公司版权所有。
The perception of action is associated with increased activity in motor regions, implicating such regions in the recognition, understanding and imitation of actions. We examined the possibility that perception of speech, both auditory and visual, would also result in changes in the excitability of the motor system underlying speech production. Transcranial magnetic stimulation was applied to the face area of primary motor cortex to elicit motor-evoked potentials in the lip muscles. The size of the motor-evoked potentials was compared under the following conditions: listening to speech, listening to non-verbal sounds, viewing speech-related lip movements, and viewing eye and brow movements. Compared to control conditions, listening to and viewing speech enhanced the size of the motor-evoked potential. This effect was only seen in response to stimulation of the left hemisphere; stimulation of the right hemisphere produced no changes in motor-evoked potentials in any of the conditions. In a control experiment, the size of the motor-evoked potentials elicited in the muscles of the right hand did not differ among conditions, suggesting that speech-related changes in excitability are specific to the lip muscles. These results provide evidence that both auditory and visual speech perception facilitate the excitability of the motor system involved in speech production. (C) 2003 Elsevier Science Ltd. All rights reserved.