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| Research article summary (published 27 Feb 2002): |
EEG theta synchronization conjoined with alpha desynchronization indicate intentional encoding.
Full Abstract
The involvement of different oscillating neuronal systems activated during intentional learning was investigated by measuring ongoing EEG activity. In 17 subjects, the EEG was recorded while learning pairs of words and faces. Subjective task difficulty was rated and a control condition of mental relaxation was also run. Spontaneous EEG activity during epochs which subsequently resulted in efficient encoding was associated with upper alpha desynchronization (10-12 Hz) and theta synchronization (4-8 Hz) when compared with spontaneous EEG activity during epochs of poor recall performance. The combined measure of theta synchronization plus upper alpha desynchronization was enhanced selectively over left frontotemporal cortical regions during efficient learning of words and over right parietal cortical regions during efficient learning of faces (P < 0.001). This striking topographical dissociation between learning materials for the combined measure of theta and upper alpha EEG activity suggests that the mode of intentional learning relies essentially on an interdependent regulation of two neuronal circuits:
the thalamo-cortical circuit and the hippocampo-cortical circuit.
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Author information
Author/s: Mölle, Matthias (M); Marshall, Lisa (L); Fehm, Horst L (HL); Born, Jan (J);
Affiliation: Department of Clinical Neuroendocrinology, Medical University of Lübeck, Ratzeburger Allee 160, Haus 23a, 23538 Lübeck, Germany. moelle(-atsign-)kfg.mu-luebeck.de
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: The European journal of neuroscience (Eur J Neurosci), published in France. (Language: eng)
Reference: 2002-Mar; vol 15 (issue 5) : pp 923-8
Dates: Created 2002/03/21; Completed 2002/05/23; Revised 2006/11/15;
PMID: 11906534, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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