Oscillatory neuronal dynamics during language comprehension.

MCM Bastiaansen, P. Hagoort

Research output: Chapter in Book/Report/Conference proceedingChapterScientific

Abstract

Language comprehension involves two basic operations: the retrieval of lexical information (such as phonologic, syntactic, and semantic information) from long-term memory, and the unification of this information into a coherent representation of the overall utterance. Neuroimaging studies using hemodynamic measures such as PET and fMRI have provided detailed information on which areas of the brain are involved in these language-related memory and unification operations. However, much less is known about the dynamics of the brain's language network. This chapter presents a literature review of the oscillatory neuronal dynamics of EEG and MEG data that can be observed during language comprehension tasks. From a detailed review of this (rapidly growing) literature the following picture emerges: memory retrieval operations are mostly accompanied by increased neuronal synchronization in the theta frequency range (4–7 Hz). Unification operations, in contrast, induce high-frequency neuronal synchronization in the beta (12–30 Hz) and gamma (above 30 Hz) frequency bands. A desynchronization in the (upper) alpha frequency band is found for those studies that use secondary tasks, and seems to correspond with attentional processes, and with the behavioral consequences of the language comprehension process. We conclude that it is possible to capture the dynamics of the brain's language network by a careful analysis of the event-related changes in power and coherence of EEG and MEG data in a wide range of frequencies, in combination with subtle experimental manipulations in a range of language comprehension tasks. It appears then that neuronal synchrony is a mechanism by which the brain integrates the different types of information about language (such as phonological, orthographic, semantic, and syntactic information) represented in different brain areas.
Original languageEnglish
Title of host publicationEvent-related dynamics of brain oscillation
EditorsC Neuper, W Klimesch
PublisherElsevier
Pages179-196
Volume159
Edition1st
ISBN (Print)9780444521835
DOIs
Publication statusPublished - 2006
Externally publishedYes

Fingerprint Dive into the research topics of 'Oscillatory neuronal dynamics during language comprehension.'. Together they form a unique fingerprint.

Cite this