Eye movements track prioritized auditory features in selective attention to natural speech
Eye movements track prioritized auditory features in selective attention to natural speech
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DOI：
10.1101/2023.01.23.525171
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
Q. Gehmacher;Juliane Schubert;F. Schmidt;T. Hartmann;P. Reisinger;S. Rösch;K. Schwarz;Tzvetan Popov;M. Chait;N. Weisz
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文献类型：
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作者：
Q. Gehmacher;Juliane Schubert;F. Schmidt;T. Hartmann;P. Reisinger;S. Rösch;K. Schwarz;Tzvetan Popov;M. Chait;N. Weisz
在过去的几十年里，认知神经科学已经确定了一组分布的大脑区域，这些区域对注意力至关重要--这是适应行为的关键原则之一。在解剖学上，与对眼动过程至关重要的大脑区域有很强的重叠，这表明注意力和眼球运动是一个联合网络。然而，这种共享网络在复杂的自然环境中的作用仍然没有得到充分的研究。在这里，我们调查了眼球运动的关系（联合国）出席句子的自然语音在同时记录的眼动跟踪和脑磁图（MEG）数据。使用时间响应函数（TRF），我们表明，眼睛注视跟踪声学特征（信封和声学发作）出席的讲话，我们称之为眼语音跟踪的现象。眼语音包络跟踪甚至区分目标从干扰在多说话人的情况下，并进一步涉及到可懂度。此外，我们提供的证据，其贡献的神经差异的语音处理，强调有必要考虑眼活动在未来的研究和解释的神经差异的听觉认知。我们的研究结果扩展了以前的联合网络的注意力和眼动控制以及运动理论的讲话。他们提供了宝贵的新方向的研究神经生物学机制的现象，其依赖于学习和可塑性，其功能的影响，在社会交往。
Over the last decades, cognitive neuroscience has identified a distributed set of brain regions that are critical for attention - one of the key principles of adaptive behavior. A strong anatomical overlap with brain regions critical for oculomotor processes suggests a joint network for attention and eye movements. However, the role of this shared network in complex, naturalistic environments remains understudied. Here, we investigated eye movements in relation to (un)attended sentences of natural speech in simultaneously recorded eye tracking and magnetoencephalographic (MEG) data. Using temporal response functions (TRF), we show that eye gaze tracks acoustic features (envelope and acoustic onsets) of attended speech, a phenomenon we termed ocular speech tracking. Ocular speech envelope tracking even differentiates a target from a distractor in a multi speaker context and is further related to intelligibility. Moreover, we provide evidence for its contribution to neural differences in speech processing, emphasizing the necessity to consider oculomotor activity in future research and in the interpretation of neural differences in auditory cognition. Our results extend previous findings of a joint network of attention and eye movement control as well as motor theories of speech. They provide valuable new directions for research into the neurobiological mechanisms of the phenomenon, its dependence on learning and plasticity, and its functional implications in social communication.