Cortical entrainment to continuous speech: functional roles and interpretations.
Cortical entrainment to continuous speech: functional roles and interpretations.
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DOI：
10.3389/fnhum.2014.00311
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发表时间：
2014
影响因子：
2.9
通讯作者：
Simon JZ
中科院分区：
文献类型：
--
作者：
Ding N;Simon JZ
听觉皮层活动被带入语音的时间包络，这对应于语音的音节节奏。这种夹带的皮层活动可以从自然听句子或口语段落的受试者中测量出来，为在线语音处理提供了可靠的神经标记。一个中心问题仍然有待回答，是否皮质夹带活动更密切相关的语音感知或非语音特定的听觉编码。在这里，我们回顾了一些关于皮质夹带对语音功能作用的假设，例如，编码声学特征，解析音节边界，并在复杂的听音环境中选择感官信息。很可能语音夹带不是均匀的响应，并且这些假设分别适用于从不同神经源产生的语音夹带。本文还讨论了夹带活动与语音清晰度的关系。一个初步的结论是，θ带夹带（4-8赫兹）编码的语音特征的可懂度的关键，而δ带夹带（1-4赫兹）是有关的感知，非语音特定的声学节奏。为了进一步理解语音夹带的功能特性，需要一种分离器的方法来研究（1）不仅是时间包络，而且是编码了哪些特定的声学特征;（2）不仅是语音可懂度，而且是由夹带的皮层活动编码了哪些特定的心理语言学过程。同样，在研究其功能特性时，需要考虑夹带活性的解剖学和光谱-时间细节。
Auditory cortical activity is entrained to the temporal envelope of speech, which corresponds to the syllabic rhythm of speech. Such entrained cortical activity can be measured from subjects naturally listening to sentences or spoken passages, providing a reliable neural marker of online speech processing. A central question still remains to be answered about whether cortical entrained activity is more closely related to speech perception or non-speech-specific auditory encoding. Here, we review a few hypotheses about the functional roles of cortical entrainment to speech, e.g., encoding acoustic features, parsing syllabic boundaries, and selecting sensory information in complex listening environments. It is likely that speech entrainment is not a homogeneous response and these hypotheses apply separately for speech entrainment generated from different neural sources. The relationship between entrained activity and speech intelligibility is also discussed. A tentative conclusion is that theta-band entrainment (4–8 Hz) encodes speech features critical for intelligibility while delta-band entrainment (1–4 Hz) is related to the perceived, non-speech-specific acoustic rhythm. To further understand the functional properties of speech entrainment, a splitter’s approach will be needed to investigate (1) not just the temporal envelope but what specific acoustic features are encoded and (2) not just speech intelligibility but what specific psycholinguistic processes are encoded by entrained cortical activity. Similarly, the anatomical and spectro-temporal details of entrained activity need to be taken into account when investigating its functional properties.
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影响因子：
25
作者：
通讯作者：
--
影响因子：
4.3
作者：
Elliott TM;Theunissen FE
通讯作者：
Theunissen FE
DOI：
10.1523/jneurosci.5297-12.2013
发表时间：
2013-03-27
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Ding N;Simon JZ
通讯作者：
Simon JZ
影响因子：
9.8
作者：
Gross J;Hoogenboom N;Thut G;Schyns P;Panzeri S;Belin P;Garrod S
通讯作者：
Garrod S
影响因子：
3.8
作者：
Ghitza O
通讯作者：
Ghitza O