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Neurosci Lett. 2004 Jan 9;354(2):123-6.

Theta coupling in the human electroencephalogram during a working memory task.

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  • 1Department of Physiological Psychology, University of Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria.


The role of coupling between prefrontal and temporo-parietal brain areas within the theta frequency range of the human electroencephalogram was explored in a working memory task. During encoding of visual information higher theta amplitudes were observed in the right compared to the left hemisphere. Retrieval of visuospatial and verbal information elicited a more bilateral activation pattern. These effects were accompanied by theta coupling between dorsolateral prefrontal and right posterior temporal electrode sites during encoding. During retrieval prefrontal and bilateral temporo-parietal brain areas were coupled. These results support the idea of working memory functions being dependent on distributed prefrontal-temporal networks.

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