The role of audio-visual and auditory-motor integration in speech perception: Is what we hear dominated by what we see or how we move?

发音运动皮质在言语知觉中起着重要作用。使用重复的经颅磁刺激(TMS)扰乱大脑皮层，已经显示出在要求苛刻的言语感知任务中表现出显著的下降(MöTTönen，Rogers，&Watkins，2014)。当在困难的听力条件下听到语音时，我们的听觉系统会招募发音运动皮质来帮助语音感知。进一步的TMS研究被用来证明这一效应，发现与清晰的言语条件相比，嘴唇运动区的兴奋性增加了扭曲的言语条件(Nutall等人，2016)。这表明，在困难的语音条件下，发音运动系统与听觉语音系统的相互作用比在清晰语音中更多。

The articulatory motor cortex plays a large role in speech perception. Disrupting this cortex using repetitive Transcranial Magnetic Stimulation (TMS) has shown significant decrease in performance on demanding speech perception tasks (Möttönen, Rogers, & Watkins, 2014). When hearing speech in difficult listening conditions, our auditory system recruits the articulatory motor cortex to assist with speech perception. Further TMS studies have been used to demonstrate this effect, finding that the excitability of the lip motor region increases distorted speech conditions compared to clear speech conditions (Nuttall et al., 2016). This suggests that in difficult speech conditions, the articulatory motor system interacted with the auditory speech systems more than in clear speech.