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.
|Number of pages||9|
|Journal||Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale|
|Publication status||Published - 2010|
Doesburg, S. M., Herdman, A. T., Ribary, U., Cheung, T., Moiseev, A., Weinberg, H., Liotti, M., Weeks, D., & Grunau, R. E. (2010). Long-range synchronization and local desynchronization of alpha oscillations during visual short-term memory retention in children. Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale, 201(4), 719-27. https://doi.org/10.1007/s00221-009-2086-9