Long-range synchronization and local desynchronization of alpha oscillations during visual short-term memory retention in children

Sam M Doesburg, Anthony T Herdman, Urs Ribary, Teresa Cheung, Alexander Moiseev, Hal Weinberg, Mario Liotti, Daniel Weeks, Ruth E Grunau

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Local alpha-band synchronization has been associated with both cortical idling and active inhibition. Recent evidence, however, suggests that long-range alpha synchronization increases functional coupling between cortical regions. We demonstrate increased long-range alpha and beta band phase synchronization during short-term memory retention in children 6-10 years of age. Furthermore, whereas alpha-band synchronization between posterior cortex and other regions is increased during retention, local alpha-band synchronization over posterior cortex is reduced. This constitutes a functional dissociation for alpha synchronization across local and long-range cortical scales. We interpret long-range synchronization as reflecting functional integration within a network of frontal and visual cortical regions. Local desynchronization of alpha rhythms over posterior cortex, conversely, likely arises because of increased engagement of visual cortex during retention.
Original languageEnglish
Pages (from-to)719-27
Number of pages9
JournalExperimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale
Volume201
Issue number4
DOIs
Publication statusPublished - 2010

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