Working Memory: MEG Study Of The Oscillatory Mechanisms For Working Memory Components

The neural mechanisms underlying the involvement of different working memory components remain unclear. We investigated oscillatory activity during verbal- spatial WM tasks involving either simple retention or complex manipulation. Using MEG, we examined differences in sensor-level activity across conditions in 29 participants. No significant differences were found between simple verbal and spatial storage. Complex tasks elicited distinct oscillatory patterns: spatial manipulation showed increased anterior alpha and central beta and decreased central gamma, while verbal manipulation revealed posterior alpha/theta suppression, anterior beta increase and central gamma suppression. These results suggest modality-specific executive mechanisms and support a dual Central Executive hypothesis.