The essential role of premotor cortex in speech perception
The essential role of premotor cortex in speech perception
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DOI：
10.1016/j.cub.2007.08.064
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发表时间：
2007-10-09
期刊：
影响因子：
9.2
通讯作者：
Lacoboni, Marco
中科院分区：
文献类型：
--
作者：
Meister, Ingo G.;Wilson, Stephen M.;Lacoboni, Marco
除了颞上区参与处理复杂的语音之外，有证据表明运动系统也可能发挥作用 [1-4]。这表明听者可能通过模拟说话者的发音姿势来感知语音 [5, 6]。这种模拟过程对于语音感知是否必要仍然是一个悬而未决的问题。我们对前运动皮层应用重复的经颅磁刺激，以破坏受试者执行语音辨别任务的能力。受试者在区分噪音中的塞音辅音方面受到损害，但在难度、任务结构和反应特征相匹配的控制任务中不受影响。这些结果表明，人类前运动皮层的破坏会损害言语感知，从而证明前运动皮层在知觉过程中的重要作用。
Besides the involvement of superior temporal regions in processing complex speech sounds, evidence suggests that the motor system might also play a role [1-4]. This suggests that the hearer might perceive speech by simulating the articulatory gestures of the speaker [5, 6]. It is still an open question whether this simulation process is necessary for speech perception. We applied repetitive transcranial magnetic stimulation to the premotor cortex to disrupt subjects' ability to perform a phonetic discrimination task. Subjects were impaired in discriminating stop consonants in noise but were unaffected in a control task that was matched in difficulty, task structure, and response characteristics. These results show that the disruption of human premotor cortex impairs speech perception, thus demonstrating an essential role of premotor cortices in perceptual processes.