Gamma and alpha/beta oscillations have characteristic WM-related temporal dynamics: gamma is elevated and beta suppressed during encoding (sample period) and readout (end-of-delay ‘‘ramp-up’’) of WM, while the opposite is true during WM maintenance (delay period; Lundqvist et al., 2016, 2018). We replicated these anti-correlated gamma/beta dynamics both when a WM is statically maintained, and when it is transferred between hemispheres. We found that theta dynamics also broadly correlate with gamma and anti-correlate with alpha/beta. We also found similar dynamics in these frequency bands in the synchrony between distinct sites both within a prefrontal hemisphere and between hemispheres, with the exception that synchronization between hemispheres at traditional gamma frequencies was absent.
