Speech Perception Triggers Articulatory Action: Evidence From Mechanical Stimulation
Speech Perception Triggers Articulatory Action: Evidence From Mechanical Stimulation
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DOI：
10.3389/fcomm.2020.00034
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发表时间：
2020-05-27
影响因子：
2.4
通讯作者：
Pascual-Leone, Alvaro
中科院分区：
文献类型：
--
作者：
Berent, Iris;Platt, Melanie;Pascual-Leone, Alvaro
神经影像学研究表明，大脑发音运动系统在言语感知过程中被激活。然而，这些结果不能确定电机系统是否参与电机模拟（例如，嘴唇运动）或非运动计算。为了衡量发音运动系统的因果作用，在这里，我们检查机械刺激的效果。参与者听到的语音标记，模糊的关于唇（ba/pa）或冠（da/ta），同时轻轻咬嘴唇或舌头。与不一致的刺激（例如，嘴唇，具有DA/TA），一致刺激（例如，舌，具有DA/TA）改变了发声感知，并提高了辨别灵敏度（d '）。这些结果表明，成年人从事发音运动系统的言语知觉，即使它是无关的反应。与经颅磁刺激实验的融合表明，言语感知涉及发音动作。这些结论阐明了体现和认知之间的联系。
Neuroimaging studies show that the brain articulatory motor system is activated during speech perception. These results, however, cannot determine whether the motor system is engaged in motor simulation (e.g., lip movement) or in non-motor computations. To gauge the causal role of the articulatory motor system, here we examine the effect of mechanical stimulation. Participants heard speech tokens, ambiguous with respect to voicing-either labial (ba/pa) or coronal (da/ta)-while lightly biting on either the lips or tongue. Compared to incongruent stimulation (e.g., lips, with da/ta), congruent stimulation (e.g., tongue, with da/ta) shifted the voicing percepts, and improved discrimination sensitivity (d'). These results demonstrate that adults engage the articulatory motor systemin speech perception even when it is irrelevant to response. The convergence with transcranial magnetic stimulation experiments suggests that speech perception engages articulatory action. These conclusions illuminate the links between embodiment and cognition.