Synchronization between Prefrontal and Posterior Association Cortex during Human Working Memory
We measured coherence between the electroencephalogram at different scalp sites while human subjects performed delayed response tasks. The tasks required the retention of either verbalizable strings of characters or abstract line drawings. In both types of tasks, a significant enhancement in coheren...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 1998-06, Vol.95 (12), p.7092-7096 |
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| container_title | Proceedings of the National Academy of Sciences - PNAS |
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| creator | Sarnthein, J. Petsche, H. Rappelsberger, P. Shaw, G. L. Von Stein, A. |
| description | We measured coherence between the electroencephalogram at different scalp sites while human subjects performed delayed response tasks. The tasks required the retention of either verbalizable strings of characters or abstract line drawings. In both types of tasks, a significant enhancement in coherence in the θ range (4-7 Hz) was found between prefrontal and posterior electrodes during 4-s retention intervals. During 6-s perception intervals, far fewer increases in θ coherence were found. Also in other frequency bands, coherence increased; however, the patterns of enhancement made a relevance for working memory processes seem unlikely. Our results suggest that working memory involves synchronization between prefrontal and posterior association cortex by phase-locked, low frequency (4-7 Hz) brain activity. |
| doi_str_mv | 10.1073/pnas.95.12.7092 |
| format | Article |
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| subjects | Biological Sciences Brain Cerebral Cortex - physiology Electrodes Electroencephalography Frequency ranges Humans Memory Memory - physiology Neurology Pattern perception Perceptual similarity Prefrontal cortex Prefrontal Cortex - physiology Visual perception Working memory |
| title | Synchronization between Prefrontal and Posterior Association Cortex during Human Working Memory |
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