NDLI: Left parietal alpha enhancement during working memory-intensive sentence processing.

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Left parietal alpha enhancement during working memory-intensive sentence processing.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Meyer, Lars Obleser, Jonas Friederici, Angela D.
Description	Country affiliation: Germany Author Affiliation: Meyer L ( Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany. lmeyer@cbs.mpg.de)
Abstract	Both functional magnetic resonance imaging (fMRI) and event-related brain potential (ERP) studies have shown that verbal working memory plays an important role during sentence processing. There is growing evidence from outside of sentence processing that human alpha oscillations (7-13 Hz) play a critical role in working memory. This study aims to link this to the sentence processing domain. Time-frequency analyses and source localization were performed on electroencephalography (EEG) data that were recorded during the processing of auditorily presented sentences involving either a short or a long distance between an argument (subject or object) and the respective sentence-final verb. We reasoned that oscillatory activity in the alpha band should increase during sentences with longer argument-verb distances, since decreased temporal proximity should result in increased memory demands. When verbal working memory-intensive long-dependency sentences were compared to short-dependency sentences, a sustained oscillatory enhancement at 10 Hz was found during storage prior to the sentence-final verb, turning into a transient power increase in the beta band (13-20 Hz) at the sentence-final verb. The sources of the alpha oscillations were localized to bilaterally occipital and left parietal cortices. Only the source activity in the left parietal cortex was negatively correlated with verbal working memory abilities. These findings indicate that the parsimonious role of alpha oscillations in domain-general working memory can be extended to language, that is, sentence processing. We suggest that the function of left parietal cortex underlying verbal working memory storage during sentence processing is to inhibit the premature release of verbal information that will subsequently be integrated.
File Format	HTM / HTML
ISSN	00109452
Issue Number	3
Volume Number	49
e-ISSN	19738102
Journal	Cortex
Language	English
Publisher	Elsevier
Publisher Date	2013-03-01
Publisher Place	Italy
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Neuroscience Discipline Cognitive Science Discipline Neuropsychology Discipline Neurology Discipline Psychology Alpha Rhythm Physiology Memory, Short-term Parietal Lobe Speech Perception Acoustic Stimulation Adult Brain Mapping Electroencephalography Female Humans Language Male Reaction Time Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Neurology Experimental and Cognitive Psychology Cognitive Neuroscience Developmental and Educational Psychology Neurology (clinical) Neuropsychology and Physiological Psychology

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