Long-range synchronization and local desynchronization of alpha oscillations during visual short-term memory retention in children
- 27 November 2009
- journal article
- research article
- Published by Springer Nature in Experimental Brain Research
- Vol. 201 (4), 719-727
- https://doi.org/10.1007/s00221-009-2086-9
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.Keywords
This publication has 51 references indexed in Scilit:
- From local inhibition to long-range integration: A functional dissociation of alpha-band synchronization across cortical scales in visuospatial attentionBrain Research, 2009
- Coherent oscillatory networks supporting short-term memory retentionBrain Research, 2008
- Alpha phase coupling reflects object recognitionNeuroImage, 2008
- MEG event-related desynchronization and synchronization deficits during basic somatosensory processing in individuals with ADHDBehavioral and Brain Functions, 2008
- Effects of Working Memory Load on Oscillatory Power in Human Intracranial EEGCerebral Cortex, 2007
- Directed Cortical Information Flow during Human Object Recognition: Analyzing Induced EEG Gamma-Band Responses in Brain's Source SpacePLOS ONE, 2007
- Resting State Cortical Connectivity Reflected in EEG Coherence in Individuals With AutismBiological Psychiatry, 2007
- Phase Synchrony among Neuronal Oscillations in the Human CortexJournal of Neuroscience, 2005
- Sensitivity of human EEG alpha band desynchronization to different working memory components and increasing levels of memory loadNeuroscience Letters, 2003
- Object-load and feature-load modulate EEG in a short-term memory taskNeuroReport, 2003