Fig. 6.

Pre- and post-movement motor beta bursts exhibit the predicted bilaminar dynamics. A) The aligned pre-movement beta burst source level current density time courses averaged across subjects (shaded area shows standard error). B) Activity at the beginning and end of pre-movement bursts localized to deep cortical layers, whereas activity at the peak of the bursts localized superficially, in agreement with the results from the biophysical model (inset, reproduced from Fig. 3F). This was not true for spatially randomized (blue) surrogate data which yielded a flat Bayes factor time course that was not biased to either surface (shared area shows standard error). Post-movement beta bursts had similar source level temporal (C) and laminar (D) characteristics as pre-movement bursts (inset demonstrates how ΔF is computed).