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

Long-range synchronization and local desynchronization of alpha oscillations during visual short-term memory retention in children.
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DOI:
10.1007/s00221-009-2086-9
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发表时间:
2010-04
影响因子:
2
通讯作者:
Grunau, Ruth E.
Grunau, Ruth E.
中科院分区:
医学4区
文献类型:
--
作者:
Doesburg, Sam M.;Herdman, Anthony T.;Ribary, Urs;Cheung, Teresa;Moiseev, Alexander;Weinberg, Hal;Liotti, Mario;Weeks, Daniel;Grunau, Ruth E.

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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.
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