Theta responses are involved in lexico-semantic retrieval during language 
processing

Bastiaansen, Marcel C. M.; Van der Linden, Marieke; Ter Keurs, Mariken; Dijkstra, Ton; Hagoort, Peter

doi:10.1162/0898929053279469

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Theta responses are involved in lexico-semantic retrieval during language processing

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Bastiaansen, Marcel C. M.
FC Donders Centre for Cognitive Neuroimaging , External Organizations;
Neurocognition of Language Processing , MPI for Psycholinguistics, Max Planck Society;

Ter Keurs, Mariken
Language Production Group Levelt, MPI for Psycholinguistics, Max Planck Society;

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Citation

Bastiaansen, M. C. M., Van der Linden, M., Ter Keurs, M., Dijkstra, T., & Hagoort, P. (2005). Theta responses are involved in lexico-semantic retrieval during language processing. Journal of Cognitive Neuroscience, 17, 530-541. doi:10.1162/0898929053279469.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-1DE4-8

Abstract

Oscillatory neuronal dynamics, observed in the human electroencephalogram (EEG) during language processing, have been related to the dynamic formation of functionally coherent networks that serve the role of integrating the different sources of information needed for understanding the linguistic input. To further explore the functional role of oscillatory synchrony during language processing, we quantified event-related EEG power changes induced by the presentation of open-class (OC) words and closed-class (CC) words in a wide range of frequencies (from 1 to 30 Hz), while subjects read a short story. Word presentation induced three oscillatory components: a theta power increase (4–7 Hz), an alpha power decrease (10–12 Hz), and a beta power decrease (16–21 Hz). Whereas the alpha and beta responses showed mainly quantitative differences between the two word classes, the theta responses showed qualitative differences between OC words and CC words: A theta power increase was found over left temporal areas for OC words, but not for CC words. The left temporal theta increase may index the activation of a network involved in retrieving the lexical–semantic properties of the OC items.