期刊
NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS
卷 34, 期 7, 页码 1002-1014出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neubiorev.2009.10.004
关键词
Electroencephalogram (EEG); Binding; Oscillations; Phase synchronization; Event-related potentials (ERP); Memory
资金
- DFG [DFG-KL1856/1-1 of Forschergruppe 448]
A central topic in cognitive neuroscience is the question, which processes underlie large scale communication within and between different neural networks. The basic assumption is that oscillatory phase synchronization plays an important role for process binding - the transient linking of different cognitive processes - which may be considered a special type of large scale communication. We investigate this question for memory processes on the basis of different types of oscillatory synchronization mechanisms. The reviewed findings suggest that theta and alpha phase coupling (and phase reorganization) reflect control processes in two large memory systems, a working memory and a complex knowledge system that comprises semantic long-term memory. It is suggested that alpha phase synchronization may be interpreted in terms of processes that coordinate top-down control (a process guided by expectancy to focus on relevant search areas) and access to memory traces (a process leading to the activation of a memory trace). An analogous interpretation is suggested for theta oscillations and the controlled access to episodic memories. (C) 2009 Elsevier Ltd. All rights reserved.
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