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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Visual speech speeds up the neural processing of auditory speech.
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Visual speech speeds up the neural processing of auditory speech.

机译：视觉语音可加快听觉语音的神经处理。

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摘要

Synchronous presentation of stimuli to the auditory and visual systems can modify the formation of a percept in either modality. For example, perception of auditory speech is improved when the speaker's facial articulatory movements are visible. Neural convergence onto multisensory sites exhibiting supra-additivity has been proposed as the principal mechanism for integration. Recent findings, however, have suggested that putative sensory-specific cortices are responsive to inputs presented through a different modality. Consequently, when and where audiovisual representations emerge remain unsettled. In combined psychophysical and electroencephalography experiments we show that visual speech speeds up the cortical processing of auditory signals early (within 100 ms of signal onset). The auditory-visual interaction is reflected as an articulator-specific temporal facilitation (as well as a nonspecific amplitude reduction). The latency facilitation systematically depends on the degree to which the visual signal predicts possible auditory targets. The observed auditory-visual data support the view that there exist abstract internal representations that constrain the analysis of subsequent speech inputs. This is evidence for the existence of an analysis-by-synthesis
机译：刺激向听觉和视觉系统的同步呈现可以修改任一模态中感知的形成。例如，当说话者的面部发音运动可见时，听觉语音的感觉得到改善。已提出将神经融合到表现出超可加性的多感觉位点上作为整合的主要机制。然而，最近的发现表明，推测的感觉特异性皮层对通过不同方式呈现的输入有反应。因此，视听表示出现的时间和地点仍未解决。在组合的心理物理和脑电图实验中，我们表明视觉语音可以提早（在信号发作的100毫秒内）加快听觉信号的皮质处理。听觉与视觉的互动反映为咬合架特定的时间便利性（以及非特定的振幅降低）。等待时间的便利性系统地取决于视觉信号预测可能的听觉目标的程度。观察到的听觉-视觉数据支持以下观点：存在抽象的内部表示形式，这些表示形式限制了后续语音输入的分析。这是存在综合分析的证据

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