Neural activity during sentence processing as reflected in theta, alpha, beta, and gamma oscillations

Nietzsche H L Lam, Jan Mathijs Schoffelen*, Julia Uddén, Annika Hultén, Peter Hagoort

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

42 Citations (Scopus)

Abstract

We used magnetoencephalography (MEG) to explore the spatiotemporal dynamics of neural oscillations associated with sentence processing in 102 participants. We quantified changes in oscillatory power as the sentence unfolded, and in response to individual words in the sentence. For words early in a sentence compared to those late in the same sentence, we observed differences in left temporal and frontal areas, and bilateral frontal and right parietal regions for the theta, alpha, and beta frequency bands. The neural response to words in a sentence differed from the response to words in scrambled sentences in left-lateralized theta, alpha, beta, and gamma. The theta band effects suggest that a sentential context facilitates lexical retrieval, and that this facilitation is stronger for words late in the sentence. Effects in the alpha and beta bands may reflect the unification of semantic and syntactic information, and are suggestive of easier unification late in a sentence. The gamma oscillations are indicative of predicting the upcoming word during sentence processing. In conclusion, changes in oscillatory neuronal activity capture aspects of sentence processing. Our results support earlier claims that language (sentence) processing recruits areas distributed across both hemispheres, and extends beyond the classical language regions.

Original languageEnglish
Pages (from-to)43-54
Number of pages12
JournalNeuroImage
Volume142
DOIs
Publication statusPublished - 15 Nov 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Lexical retrieval
  • MEG
  • Oscillations
  • Sentence processing
  • Unification

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