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Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
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Left parietal alpha enhancement during working memory-intensive sentence processing.

Lars Meyer1, Jonas Obleser, Angela D Friederici

  • 1Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany. lmeyer@cbs.mpg.de

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|April 20, 2012
PubMed
Summary
This summary is machine-generated.

Alpha oscillations in the brain are crucial for verbal working memory during sentence processing. This study found increased alpha activity in the left parietal cortex for complex sentences, linking brain waves to language comprehension.

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Last Updated: May 23, 2026

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Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies

Published on: May 9, 2019

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psycholinguistics

Background:

  • Verbal working memory is vital for sentence processing, as evidenced by fMRI and ERP studies.
  • Alpha oscillations (7-13 Hz) are increasingly recognized for their role in general working memory.
  • A gap exists in understanding alpha oscillations' specific function within language comprehension.

Purpose of the Study:

  • To investigate the role of alpha oscillations in verbal working memory during sentence processing.
  • To determine if alpha oscillatory activity increases with greater memory demands in sentence comprehension.
  • To identify the brain regions involved in alpha-mediated working memory during language tasks.

Main Methods:

  • Electroencephalography (EEG) was used to record brain activity.
  • Time-frequency analyses and source localization were applied to EEG data.
  • Participants processed auditorily presented sentences with varying argument-verb distances.

Main Results:

  • A sustained 10 Hz alpha band enhancement was observed during the storage phase of long-dependency sentences.
  • A transient beta band (13-20 Hz) power increase occurred at the sentence-final verb.
  • Alpha oscillation sources were localized to occipital and left parietal cortices, with left parietal activity correlating with working memory capacity.

Conclusions:

  • The findings extend the known role of alpha oscillations in domain-general working memory to language processing.
  • Left parietal cortex activity in the alpha band is implicated in maintaining verbal information during sentence comprehension.
  • This suggests alpha oscillations help inhibit premature verbal information release, aiding integration in complex sentences.