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The lexical semantics of adjective–noun phrases in the human brain

机译:人脑中形容词-名词短语的词汇语义

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摘要

As a person reads, the brain performs complex operations to create higher order semantic representations from individual words. While these steps are effortless for competent readers, we are only beginning to understand how the brain performs these actions. Here, we explore lexical semantics using magnetoencephalography (MEG) recordings of people reading adjective–noun phrases presented one word at a time. We track the neural representation of single word representations over time, through different brain regions. Our results reveal two novel findings: (a) a neural representation of the adjective is present during noun presentation, but this representation is different from that observed during adjective presentation and (b) the neural representation of adjective semantics observed during adjective reading is reactivated after phrase reading, with remarkable consistency. We also note that while the semantic representation of the adjective during the reading of the adjective is very distributed, the later representations are concentrated largely to temporal and frontal areas previously associated with composition. Taken together, these results paint a picture of information flow in the brain as phrases are read and understood.
机译:当一个人阅读时,大脑执行复杂的操作以从单个单词创建更高阶的语义表示。尽管这些步骤对于有能力的读者而言是轻松的,但我们才刚刚开始了解大脑如何执行这些动作。在这里,我们使用磁脑电图(MEG)记录来探讨词汇语义,该记录的人们每次读一个单词时出现形容词-名词短语。我们随着时间的推移,通过不同的大脑区域跟踪单个单词表示的神经表示。我们的结果揭示了两个新颖的发现:(a)在名词表示过程中存在形容词的神经表示形式,但是这种表示形式不同于在形容词表示过程中观察到的表示形式;(b)在形容词阅读过程中观察到的形容词语义的神经表示形式在激活后重新激活短语阅读,具有显着的一致性我们还注意到,虽然在形容词的阅读过程中形容词的语义表示非常分散,但后来的表示形式主要集中在先前与构图相关的时间和额叶区域。综上所述,这些结果描绘了阅读和理解短语时大脑中信息流的情况。

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