Vignali Lorenzo, Himmelstoss Nicole A, Hawelka Stefan, Richlan Fabio, Hutzler Florian
Centre for Cognitive Neuroscience, University of Salzburg Salzburg, Austria.
Front Hum Neurosci. 2016 Apr 29;10:191. doi: 10.3389/fnhum.2016.00191. eCollection 2016.
The present study investigated oscillatory brain dynamics during self-paced sentence-level processing. Participants read fully correct sentences, sentences containing a semantic violation and "sentences" in which the order of the words was randomized. At the target word level, fixations on semantically unrelated words elicited a lower-beta band (13-18 Hz) desynchronization. At the sentence level, gamma power (31-55 Hz) increased linearly for syntactically correct sentences, but not when the order of the words was randomized. In the 300-900 ms time window after sentence onsets, theta power (4-7 Hz) was greater for syntactically correct sentences as compared to sentences where no syntactic structure was preserved (random words condition). We interpret our results as conforming with a recently formulated predictive-coding framework for oscillatory neural dynamics during sentence-level language comprehension. Additionally, we discuss how our results relate to previous findings with serial visual presentation vs. self-paced reading.
本研究调查了自定节奏的句子层面加工过程中的脑电振荡动力学。参与者阅读完全正确的句子、包含语义违背的句子以及单词顺序被随机化的“句子”。在目标词层面，对语义无关词的注视引发了较低频率的β波段（13 - 18赫兹）去同步化。在句子层面，对于句法正确的句子，伽马功率（31 - 55赫兹）呈线性增加，但单词顺序被随机化时则不然。在句子开始后的300 - 900毫秒时间窗口内，与没有保留句法结构的句子（随机单词条件）相比，句法正确的句子的θ功率（4 - 7赫兹）更大。我们将研究结果解释为符合最近提出的句子层面语言理解过程中振荡神经动力学的预测编码框架。此外，我们还讨论了我们的结果与先前关于串行视觉呈现与自定节奏阅读的研究结果之间的关系。
